MOST CAPABLE CORVETTE EVER!
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1. Tech2 Diagnostics S750 per year includes Tech2 Diagnostic software updates GM Global Diagnostic System 2 GDS2 S57 3 days 227 monthly 575 per year includes e Diagnostics for specific vehicles beginning in MY2010 Tech2Win S55 3 days includes e Software to emulate Tech2 diagnostics on aPC or laptop Does not provide programming capability GM Vehicle Communication Interface Package S775 per year includes GDS2 Tech2Win GDS2 requires a GM MDI or J2534 2 equivalent Tech2Win requires an ISO 22900 PDU API compliant device View a list of GDS2 supported vehicles Jul Sep 2015 Servicelnsights 9 _ MOST CAPABLE The C7Z R Edition pays tribute to the Corvette Racing C7 R racecars It s offered in Corvette Racing s signature yellow livery or black with coordinated exterior and interior accents Only 500 will be built all with the Z07 Performance Package with carbon ceramic brakes and a Specially serialized vehicle identification number The Corvette Z06 s capability is rooted in its LT4 super charged 6 2L V8 engine which is SAE certified at 650 horsepower 485 kW at 6 400 rpm and 650 Ib ft of torque 881 Nm at 3 600 rpm making it the most powerful pro duction car ever from General Motors and one of the most powerful production cars available in the United States With the available ZO7 package its capability enables e 0 60 mph acceleration in 2 952. GENUINE PARTS GM 6 Speeds TEHCM Programming Front and Center at ATRA Powertrain Expo GM Customer Care amp Aftersales will present a comprehensive seminar on servicing GM 6 speed transmissions It will cover the finer points of diagnosing servicing and replacing 6 speeds A special emphasis will be the Transmission Electro Hydraulic Control Module The TEHCM is a component of all GM 6 speed transmissions It optimizes shifting fuel economy operating life and overall performance But it must be programmed to operate correctly The seminar will review how Independent Service Centers ISCs working on 6 speeds do that using a TIS2WEB interface and a scan tool The event will be patterned after the TEHCM You Can Fix EM seminar presented at the ATRA 2014 Powertrain Expo It was well attended by service technicians interested in GM 6 speed service business opportunities GM has made that possible by expanding access to TEHCM programming beyond GM dealer service centers GM continues to make it easy for ISCs to try their hand at GM 6 speed work Through the end of 2015 ISCs can get a no cost 2 day TIS2WEB subscription with the purchase of a GM 6 speed transmission Independent service centers have a great opportunity to expand into GM 6 speed transmission service work says Michelle Francisco product specialist transmission amp transfer case assemblies with GM CCA Attending the ATRA show and taking in our 6 speed and TE
3. availability of extensive additional resources from GM that techs can consult He never loses sight of the goal arm techs with the understanding that repairing GM vehicles requires specialized knowledge and strive to make sure they know how to find it and use that in their work Knowledge is nothing more than another tool and the more you have the better off you re going to be he says Jul Sep 2015 Servicelnsights 5 GM Powered Nautique Boats Make Their First Appearance at Masters Tournament Slalom trick and jump events In earlier qualifying events for the tournament held in Orlando a Ski Nautique 200 pulled a competitor to a world ski jump record That put another feather in the boat s cap Since its introduction At the 56th Annual Masters Water Ski amp Wakeboard it has pulled competitors to 20 world records in different Tournament GM and its partners unveiled a brand new events triple the number of all competing boats combined GM Gen V engine application according to Nautique Meanwhile other GM powered boats pulled several competitors to new records and GM Marine Engines shared the spotlight as a presenting sponsor of the Sport s premier event The Gen V GM engine marinized and supplied by PCM Marine Engines powered Ski Nautique 200 boats built by Nautique Boat Company This was absolutely huge for the engine s debut tournament says Brad Gearheart Nautique senior marketing communication
4. seconds with the eight speed automatic and 3 2 seconds with the seven speed manual transmission 10 Jul Sep 2015 Servicelnsights CORVETTE EVER e Quarter mile times of 10 95 seconds at 127 mph with the eight speed and 11 2 seconds at 127 mph with the seven speed transmission e Lateral acceleration of 1 2 g e 60 0 mph braking in only 99 6 feet the best of any production car tested by General Motors The Z07 package adds adjustable front and rear aero components for true aerodynamic downforce Michelin Pilot Super Sport Cup tires for enhanced grip and Brembo carbon ceramic matrix brake rotors that improve braking performance and contribute to greater handling through reduced un sprung weight The unique grille also features dedicated brake cooling intakes and wider grille outlets on the bottom serve as air diffusers The grille is complemented with a larger hood vent which vents hot air from the engine compartment and contributes to downforce by allowing air driven through the grille to exit through the hood rather than being forced under the car which could create lift Additional cooling elements include larger front fender vents and unique air blades over the inlets on the rear fenders of Coupe models which force about 50 percent more air into the cooling ducts for the transmission and differential coolers than those on the Stingray Convertible models feature under body inlets To cope with the additional airflow
5. their insurer will only pay for aftermarket parts Morey isn t Sure what he ll purchase next with his Genuine GM Rewards points Something for his wife and business partner Amber perhaps Maybe something for the business Then again there s always golf I saw that you can get a golf cart for 7 000 points he says That s alot of Genuine GM Parts But after hearing his enthusiasm l m certain he ll have those points in no time Jul Sep 2015 Servicelnsights
6. EWS amp TECHCONNECT Diagnosing Voltage Drops When an electrical circuit is operating as designed electrons flow from the battery positive terminal through each of the components and wiring in the circuit through vehicle ground and back to the battery negative terminal Components include the battery wiring terminals relays switches and other controls the load and various other items depending on the circuit What Is Voltage Drop FLUKE g0 ATAOE METHA TEET hy HAA Voltage is the pressure that pushes electrons to flow through a circuit Current also called amperage is the measure of electron flow Resistance is what holds back electrons from flowing freely Everything that electricity flows through has some amount of resistance When electrons are held back by a resistance fewer of them are available to do the work the circuit was designed for The difference between the amount of electrons on either side of the resistance is the amount of electrons that didn t make it through that dropped out This results in voltage drop Excessive resistance causes excessive voltage drop and voltage drop is a symptom that can be identified and measured in a malfunctioning circuit For example if a fuel pump isn t operating diagnosis calls for verifying system voltage and ground at the fuel pump electrical connector using a digital multimeter DMM But if there is corrosion on the fuel pump relay contact o
7. HCM clinic is an ideal way to begin testing the waters of this promising line of business GM CCA is also planning an 8 speed transmission display at its show booth The 8 speed is a next generation GM transmission that service technicians will be required to understand as they are installed in more GM vehicles The ATRA 2015 Powertrain Expo will be held at the Rio All Suite Hotel amp Casino Oct 29 Nov 1 2015 For registration information visit www powertrainexpo com AUTOMATE TRANS We REG DERS ASSOC LATION a ane GM OE Parts Update New Revised Training Topics In Place For GM Technical Training Clinic Program GM Customer Care amp Aftersales is expanding its commitment to Independent Shop technical education in 2015 GM CCA is adding four brand new service topics to its course offerings in the GM Technical Training Clinic program The clinics are hosted by GM Parts dealers and the dealer invites their local independent shops to attend the FREE training The new clinics address areas certain to be of interest to Independent Shops Two clinics HVAC Technology and Service and Brake Service Tips examine technological advances making that work more challenging Today s Top Service Concerns offers a wide ranging discussion of emerging challenges in diagnostics and repair procedures TEHCM Programming reviews procedures for working with the Transmission Electronic Hydraulic Control Module for GM 6 speed transmission
8. RTS TIS2Web Programming Opens Up New World of GM Vehicle Diagnostics Programming TIS2Web is the gateway to calibration and diagnostic software specific to GM vehicles It s the one stop go to source With it problems can be quickly isolated and targeted repairs performed TIS2Web is a web based subscription service with various programming and diagnostic software packages to fit any business need Subscribe to TIS2Web for Global Diagnostic System 2 Tech2 Scan Tool diagnostic software Tech 2 Win and Service Programming System software The packages range from limited duration access to basic diagnostics capabilities and unrestricted year round passes to the full suite of GM service resources Access to Live Help Subscribers also get access to live GM Assistance That s a benefit when help is needed with diagnostic matters Assistance is available via phone e mail or remote control of atech s PC At any level a TIS2Web subscription is a modest investment That s a benefit when help is needed with diagnostic software concerns An ISC can tap deeply into the GM vehicle service database Paired with the right hardware it can yield profitable work that previously may have gone to dealer service lanes and specialized competitors In addition it helps ensure the work is done efficiently and correctly With TIS2Web shops can keep that specialized GM vehicle work in house In acompetitive business where every p
9. TIS2Web online or to purchase a subscription TAKE ADVANTAGE OF BOSCH DIAGNOSTIC EQUIPMENT REBATE SPS Programming Tips Before programming a vehicle control module using the GM Service Programming System SPS there are several steps technicians can take to assist in completing a successful programming event While every repair shop may have a different network environment here are a few recommended best practices Setup Configuration Recommended setup and configuration e Place the service PC next to or inside the vehicle if it s a laptop computer e Alaptop computer should be plugged in to ensure the laptop battery will be maintained during the programming event e Connect the PC to the Internet TIS2Web via a quality LAN cable or reliable Business Grade Wi Fi access point e Connect the PC to the J2534 programming interface device using the USB cable method e Connect a battery maintainer or equivalent to maintain proper battery voltage during programming when required e Toensure the computer remains active adjust the Microsoft Windows Power Options Select the High performance power plan and set it to Never sleep in either On Battery or Plugged In modes Recommended Process Rationale During SPS programming the required data calibration files are retrieved from the TIS2Web server They are downloaded completely verified and cached onto the service PC before module programm
10. ZO6 Coupe and Convertible also have larger rear fascia openings than the Stingray Standard front and rear brake cooling ducts including ZO06 signature rear ducts integrated in front of the rear fender openings are also part of the functional design changes over Stingray models The Z06 also benefits from interior details designed for high performance driving first introduced on the Stingray including a steel reinforced grab bar on the center console for the passenger and soft touch materials on the edge of the console where the driver naturally braces during high load cornering Performance Data Recorder The award winning industry first Performance Data Recorder or PDR enables users to record high definition video with telemetry overlays of their driving experiences on and off the track It was developed with Cosworth the motorsports engineering company that supplies the Corvette Racing team s data acquisition and telemetry electronics system The PDR system includes three major components all seamlessly integrated into the Corvette Z06 s interior First is a high definition camera mounted within the windshield header trim which records the driver s point of view through the windshield Audio is recorded via a dedicated microphone in the cabin Second is a self contained telemetry recorder which uses a dedicated GPS receiver that operates at 5 hertz or cycles per second five times faster than the in dash navigat
11. cal aspect of repairing today s vehicles that have an increasing number of electronic control modules sensors and actuators running on multiple data networks ina vehicle For most shops service programming provides an important revenue stream and can be a key competitive differentiator SPS is available through an online TIS2Web subscription to update the flash calibration files stored in a vehicle s onboard control modules Using a J2534 programming interface device SPS communicates with a vehicle control module to modify it or reprogram it with newer calibration information downloaded from the GM Technical Delivery System website Service programming Is not complicated but it must be done right Shops that use GM s service programming subscription may find the service programming learning curve is smaller than expected With the right tools and a GM Service Programming 50 SPS subscription independent service centers can program vehicle control modules themselves to maximize the potential of many repairs reducing the time and expense of outsourcing the work GM s short SPS video is a key resource along with 11 additional TIS2Web tutorial videos that are now available to help support independent repair shops that diagnose and program GM vehicles using GM software applications Visit the GM TechConnect website to view the Service Programming tutorial and other videos Click TIS2Web in the Tool Box to learn more about
12. erform the necessary repairs and test again Often the very act of pulling a terminal apart will scrape offending corrosion away But to be sure use approved cleaning procedures If cleaning the connectors does not decrease the voltage drop to an acceptable level the component itself may be defective or may require further examination or testing After making the repair perform the voltage drop test again to confirm that the repair was successful Another Consideration To this point only voltage drops that are higher than design intent have been discussed However voltage drops that are too low can be a problem too Some circuits are controlled by inserting a specified or a variable resistance If this resistance and its resulting voltage drop are too low the circuit will fail to operate as designed For instance many sensors in a computer controlled engine management system operate on the voltage drop principle The amount of voltage drop is interpreted by the computer as a variable operating condition A sensor that drops too little voltage or too much will cause improper operation Article originally appeared in ACDelco News amp TechConnect P2 GM Service Programming System Video Tutorial on ACDelco TechConnect GM has added the Service Programming System SPS tutorial to its lineup of videos covering programming and scan tool diagnosis for service technicians in aftermarket repair shops The SPS video covers acriti
13. iece of business matters that can be a game changer We know many shops send their customers to their competitors or outsource the service programming because they didnt have the right tools to confidently identify and make the repair says Bob Stewart with GM Customer Care amp Aftersales Or they ate into their profits and productivity by spending hours on a vehicle that could have been diagnosed and repaired quickly That impacts customer service Transmission Flashing More ISCs are seeing opportunities in GM 6 speed automatic transmission work To do that work techs must be able to flash the transmission s TEHCM Transmission Electro Hydraulic Control Module TIS2Web is the only source for those programming tools For more information about subscribing to TIS2Web go to www acdelcotechconnect com and click on TIS2Web under the title Toolbox Complete GM Service Support Package 3 125 per year includes e GMSi Tech2 Diagnostic Software Updates Tech2 Snapshot GDS2 Tech2Win Service Programming Software Tech2 and Service Programming Package 1 395 per year includes Tech2 Diagnostic Software Updates Tech2 Snap Shot Tech2Win Service Programming Software Service Programming System SPS Only S55 2 days 275 3 months 9995 per year includes GM and Saturn software to update vehicle calibrations GM vehicle calibrations may be looked up at no charge
14. ing can begin When ready programming continues using these cached files and the required data is then transmitted from the PC to the vehicle module by way of the J2534 device and DLC If an error or connection problem occurs during file retrieval it may be necessary to restart or recover and carry on retrieving the required files If a communication error develops while transmitting to the vehicle there is arisk of damage to the vehicle module that may be unrecoverable Because of this a USB connection from the service PC to MDI is a best practice 16 Jul Sep 2015 Servicelnsights MS Web Trouble Free Programming Several factors to consider to help ensure trouble free programming include Dedicate the service PC laptops preferred Placing a laptop PC inside the vehicle during programming ensures the PC remains dedicated to that function This helps to minimize risk of someone accidentally interrupting the programming process by multitasking the PC Laptops are preferred because their portability permits placement in the vehicle and the internal battery provides additional insurance in the event of a temporary AC power interruption during programming A power supply should be used at all times Prevent PC going into sleep mode Laptops are typically configured to conserve power using Power Management techniques Disable or adjust the Windows Power Options to prevent the computer from going to sleep during the progra
15. ion system which allows more precise positioning and corner traces Finally the system features a dedicated at GENUINE PARTS SD card slot in the glove box for recording and transferring video and vehicle data SD card not included Recording time depends on the capacity of the memory card but an 8 gigabyte card can record approximately 200 minutes while a 32 GB card stores up to about 800 minutes more than 13 hours of driving time The PDR system can record video with three data overlay options each rendered in real time e Track Mode shows the maximum level of data on the screen including speed rpm g force a location based map lap time and more Sport Mode shows fewer details on the overlay but includes key data including speed and g force Touring Mode simply records and displays video and audio of the drive with no data overlay Performance Mode records performance metrics such as 0 to 60 mph acceleration 1 4 mile speed and elapsed time and O 100 0 mph runs The video can be viewed on the Corvette Z06 s eight inch color touchscreen when the car is parked or downloaded to a computer for further editing and sharing video via social media sites For users who want a more in depth understanding of their performance the PDR vehicle data can be opened in the included Cosworth Toolbox software which combines Cosworth s professional level motorsport data analysis with an easy to use graphic i
16. l Motors reserves the right to change specifications without notice and without obligation Published letters do not necessarily reflect the opinions of General Motors or General Motors Parts General Motors Detroit MI 48202 2015 General Motors All rights reserved eA Jul Sep 2015 Servicelnsights 3 GM 6 Speeds TEHCM Programming Front and Center at Fall ATRA Powertrain Expo Read more at GMServicelnsights com 4 New Revised Training Topics in Place for GM Technical Training Clinic Program Read more at GMServicelnsights com 5 GM Clinic Instructor Jerry Mungle Makes Learning Fun 6 Gen V Marine Debut Nautique Boats Powered by GM Pleasurecraft Engines at 2015 Masters Tournament Read more at GMServicelnsights com 8 GM Unveils Reman Turbocharger Line for Duramax Engines Read more at GMServicelnsights com 9 TIS2Web Subscription Opens Up New World of GM Vehicle Diagnostics Programming Read more at GMServicelnsights com 10 2016 Corvette ZO6 Most Capable Corvette Ever Read more at GMServicelnsights com 12 2015 Corvette Service Procedures www gmtechinfo com offers access for service manuals and other repair resources Follow this example for the Corvette 16 TechConnect Insert TechConnect is a magazine to help professional technicians improve their knowledge and understanding of today s increasingly complex vehicles 18 Arkansas Body Shop Owner Indulges his passion with GM Rewards
17. l procedure Jn L Lebat aan l tal PEL Note This is a visual check that will tell i Ai rocedure was done J noc nn rF MMmoN I f l 1p l 1A K correctly If fluid does not come out of the high pressure line three h times verify ther Are nn internnal externnl le p re are no internal external leaks valve stuck or the motor seized before proceeding to the next step 1 Top off Rear Drive Clutch fill hole again with appropriate fluid and repeat Rear Differential Hydraulic Line Fill with scan tool once more 15 Turn engine off 16 Remove DT 51381 Reattach high pressure line to clutch pack 1 Top off Rear Drive Clutch fill hole again with appropriate fluid Install fill plug 18 Reattach the rear stabilizer shaft clamps Refer to Stabilizer Shaft Replacement 19 Install the left rear tire and wheel assembly Refer to Tire and Wheel Removal and Installation 2 0 Lower vehicle back down 2 1 Restart engine 2 2 From the scan tool menu select Rear Differential Clutch Control Module then select Control Functions then Rear Differential Hydraulic System Service Bleed Note The Rear Differential Clutch Control Module can run this n o tomantc m Da IF h nt nnac pr ocedl ure up tO 3 at tempts lO l ge ta Pas S IJ this step do nol Dass et pa repeat procedure from step 2 Note Status will change to Complete when done ACDelco Oyer 100 Years oT Experience ACNeic ACDelco N
18. mming event Choosing an MDI connection method for SPS J2534 device connections are critical to the success of module programming Reliability takes precedence over convenience so keep it simple Connecting the device directly to the service PC via the USB cable is recommended in order to maintain an error free connection between the PC and vehicle module via the J2534 device and DLC This method is simple easy and eliminates any potential for a network problem to interfere while transmitting data to the module during programming Quality Reliability of shop network LAN Wi Fi hardware used by repair shops varies greatly and is difficult to qualify GM recommends Business Grade hardware for the Wi Fi Access Points AP Hard wired cable connections to the LAN are considered more reliable than Wi Fi and may be more suitable if not near a reliable Wi Fi connection Beware that cables are still prone to physical damage such as deterioration of the cable or connector which is not always visually evident If a cable is suspect substitute another cable Throttle it Back Check Connections Before Replacing the Throttle Body or Accelerator Pedal Automotive engineers continue to work to design vehicle systems that reduce weight improve engine performance and increase fuel economy One of those systems is the electronic throttle control system ETC The electronic throttle control system is made up of an electrically controlled thr
19. nterface The Corvette Z06 is built at GM s Bowling Green Ky assembly plant For more pictures and videos on the 2016 Chevrolet Corvette ZO6 go to www gmserviceinsights com Jul Sep 2015 Servicelnsights The Technical Side 2015 Chevrolet Corvette Repair Procedure Even though the Chevrolet Corvette is a new vehicle service and repair information resources are a click away at www gmtechinfo com Electronic Service Information Technicians and shop owners can log on to the site to gain access to subscription services for service procedures and repair manuals A complete Service Manual is accessible 24 7 through a subscription to the site Free collision repair procedures will soon be available for the vehicles by going to www genuinegmparts com Rear Differential Hydraulic System Service Fill Bleed Rear Differential Hydraulic System Service Fill Bleed Procedure The rear differential hydraulic system service bleed is used to remove air from the system check for proper system and solenoid function and determine if full pressure can be achieved at the apply piston Any time a rear differential hydraulic line is disconnected or any repairs are made this procedure must be performed Special Tools DT 51387 Limited Slip Differential Clutch Pipe Connector For equivalent regional tools refer to Special Tools Connect scan tool and check the rear differential clutch control module for any DTCs and perform repairs as neces
20. onnected to the side of the component closest to the battery positive terminal 3 Connect the negative black lead of the multimeter to another point of the circuit Generally the negative lead should be connected to the side of the component closest to the battery negative terminal ground Jul Sep 2015 Servicelnsights If the test leads are reversed the measurement will be indicated as negative voltage although the numerical value will be accurate Operate the circuit 5 While the circuit is operating the multimeter displays the difference in voltage between the two points Because the excessive resistance you re looking for may be in the ground connection of the component be sure to doa voltage drop test between the circuit s ground stud and the battery s negative terminal The amount of voltage drop that is acceptable depends on the current being carried by the circuit A lower current equates to a lower acceptable voltage drop According to standards established by the Society of Automotive Engineers SAE 8 milllivolts mV is the maximum acceptable voltage drop in a 16 gauge wire carrying 15 amps For a fuel pump as mentioned earlier an acceptable voltage drop should be close to zero but no more than 1 10 of a volt for each connection in the circuit Repairing the Cause of an Excessive Voltage Drop If any voltage drop is higher than acceptable disconnect the appropriate connections and look for corrosion P
21. ottle body an electronic accelerator pedal and wiring to connect these components to an electronic control unit or ECU Analysis of throttle bodies returned under warranty shows most are found to be fully functional Common Issues The most common reason for electronic throttle control malfunctions is high resistance in one or more of the sensor circuits between the accelerator pedal and the ECU or between the ECU and the throttle body These low voltage signals can be affected by resistance in the circuits as a result of poor terminal tension or corrosion Another condition is higher than normal idle speed and high engine speed during deceleration after replacing the throttle body or cleaning carbon from the area around the throttle blade How to Repair the ETC System For Diagnostic Trouble Codes DTC related to the throttle or accelerator position sensors GM offers a variety of wiring pigtails to repair wiring concerns A common pigtail used to repair GREEN FILL SALMON FILL i BLUE FILL the ETC system is part number PT2713 This pigtail connector attaches to the throttle body and comes with six blunt cut wires and 7 eT r LD six crimp n seal splice sleeves to make the electrical connection to the vehicle wiring harness To connect the pigtail to the vehicle harness 1 Strip 5 16 inch 8 mm of insulation from the wires to be joined 2 Insert one of the wires into the splice sleeve until it hi
22. pendent Body Shop customers of GM Parts dealers have been extensively updated and enhanced Were fielding a total of 12 brand new clinics this year in hopes of keeping training topics fresh and on top of new technology says Hartley aM GENUINE PARTS GM Clinic Instructor Jerry Mungle Strives to illuminate anni of GM Vehicle Repair Just as blind spot spell potential troub le for repair r techi nician ae rivers at risk they Sometimes you don t know what you don t Know says Jerry Mungle an instructor in the GM Technical Training Clinic program Mungle is guided by a keen understanding of the need to confront that problem In teaching GM dealer sponsored clinics for mechanical service and body repair techs Mungle tries to highlight specialized facets of GM vehicle repairs It s getting harder to say that one size fits all anymore across different vehicle makes and even within the GM family of vehicles he says Two GM vehicles side by side can be completely different in their structure and design The clinics address that problem by focusing on GM specific information that can guide techs in the nuances of repairing GM vehicles And while there s a general script for each subject area instructors bring their own style to the mix Mungle who has taught GM repair for 15 years is no exception Training Should Be Fun really try to make it enjoyable and relevant to what
23. r ground connection to the chassis there might be enough voltage potential for the multimeter to read correctly but the circuit voltage may drop off under load Measure the voltage between the battery positive post and the positive feed at the fuel pump connector with the fuel pump commanded on using a scan tool and with a load applied such as from a small sealed beam headlamp The multimeter will display the difference in voltage potential between the two points the voltage drop Why Not Measure Resistance If excess resistance is the cause of the problem ina malfunctioning circuit it may seem logical to use an ohmmeter to measure and locate the excess resistance But this is not a good idea for several reasons First the ohmmeter sends only a few thousandths of an amp called a milliamp though the circuit This does not simulate the reality of a circuit that normally carries higher amperage EE Block BLL Second the ohmmeter uses its own power supply so the circuit being tested must be isolated disconnected temporarily from the vehicle s battery Again this does not Solari simulate reality And third a very small amount of resistance possibly too small to be measured accurately with an ohmmeter can have a very large effect particularly on high amperage circuits like the starter motor circuit As an example a resistance of only 0 01 ohm in a 200 amp 12 volt circuit will cause a d
24. rop of 2 volts Ohm s Law voltage current x resistance Jul Sep 2015 Servicelnsights 13 How to Measure Voltage Drop The voltage drop test is ideal for locating excessive resistance in acircuit First the circuit being tested is not disturbed in any way by the test so reality is maintained Second the voltage drop test actually requires the circuit to be operating during the test And a high impedance multimeter offers very high resistance through its circuitry so it does not cause confusion by introducing an alternative path for current to flow Never measure voltage in a computer controlled circuit unless instructed to do so by a service procedure Done incorrectly or with the wrong instrument the test could cause more problems than it locates In addition do not insert digital multimeter test probes into any connector or fuse block terminal The diameter of the test probes will deform most terminals A deformed terminal will cause a poor connection which will result in a system failure Always use the properly sized probe from an appropriate terminal test probe kit in order to front probe terminals Do not use paper clips or other substitutes to probe terminals Use a digital multimeter when performing voltage drop tests 1 Set the digital multimeter to the V DC position 2 Connect the positive red lead of the multimeter to one point of the circuit to be tested Generally the positive lead should be c
25. s We evaluated the entire program with an eye toward keeping the topics fresh relevant and on top of new automotive technology says Amy Hartley GM CCA wholesale channel associate That meant taking a look at offerings that covered technologies that were no longer as relevant and removing or tweaking them and adding new courses that cover important automotive technologies that most impact shops today GM CCA spent months reviewing and evaluating the clinic program The effort drew on input from trainers dealers and independent shops The combined insights helped GM CCA refine their course offerings 4 Jul Sep 2015 Servicelnsights Feedback from the field team and our customers was essential to determining the expansion of our clinic program and its more comprehensive offerings says Dale Tripp manager engineering training quality and brand protection What we re offering now is very responsive to what our customers are looking for in the area of GM education and training GM CCA has been expanding the geographic reach of the Technical Training Clinic Program A network of experienced and knowledgeable trainers has been assembled Now scores of GM Parts dealers across the country are able to host training for independent shops in their local markets In addition to refining the service clinic offerings GM CCA has been revamping the collision repair component of the clinic program Clinic offerings for Inde
26. s coordinator Meanwhile another GM engine equipped Nautique boat pulled a Master s competitor to a perfect score in the wakeboard competition Behind a Super Air Nautique i Orlando FL PCM is a longtime The Gen V delivers outstanding G23 equipped with a PCM LSA GM Marine Engine OEM performance including greater fuel engine Australian superstar Partner and exclusive power Harley Clifford rode to a perfect supplier to Nautique a leading anini AES aay 4 E E 100 point run Perfection had ski boat manufacturer engine that s superior in numerous ways never been achieved before in The Ski Nautique 200 to the previous engine 2 Greg Meloon any certified wakeboard event is one of the top water ski boats around It s even more formidable with the new Gen V engine Incorporating the latest GM technology the Gen V enhances the power efficiency maneuverability and overall performance that professional grade ski boats must deliver In the tournament staged on Robin Lake at Callaway Gardens Pine Mountain GA Ski Nautique 200s pulled scores of competitors to impressive performances in In a press release Nautique president Greg Meloon was quoted as saying that the Super Air Nautique G23 proved once again why it is clearly the best boat in the history of wakeboarding The first ever perfect 100 point run could not have happened behind any other boat Equally impressive were the water ski athle
27. s distance and accuracy off the tee A 15 handicapper Wnt he s a regular in a group that plays weekly at courses ws in nearby Bella Vista AR They all like to show off TR the latest gear and now it s Morey s turn to show off his new Titleist 915 driver I ve had Titleist drivers before and this is their latest and greatest he says So far it s a great club Morey has been enrolled in Genuine GM Rewards for a couple of years He started thinking about cashing in when he noticed his account balance was around 1 000 points When he learned points could be redeemed for golf equipment he made a beeline for the online catalog It s Easy to Claim Your Rewards My rep at our GM dealer told me how easy it was to shop with the Genuine GM Rewards program Morey says He knew wanted that driver too and he suggested check it out It took me about five minutes to complete the purchase and had the club a few days later With a 500 point balance remaining in his account Morey s plan is to let the points accumulate That won t be a problem because a third of his business is GM vehicles and every chance he gets he chooses Genuine GM Parts really prefer to put factory parts on because they re consistently higher quality and they fit the first time he says My first option is always to see if OE will match the aftermarket price It s a great feeling when you can tell a customer they Il get OE parts even when
28. s performed with the engine running the scan tool may indicate that the procedure is complete when it is not The procedure can be found at the following path on the Tech 2 scan tool using a 2009 GMC Sierra as an example Engine Control Module gt Module Setup gt Idle Learn Reset e Confirm that the procedure completed successfully by viewing the TB Idle Air Flow Compensation PID in scan tool data If the procedure was successful this PID will show 0 e If high idle is not corrected by following these steps reprogram the Engine Control Module ECM to reset the Idle Air Flow Compensation PID to 0 Jul Sep 2015 Servicelnsights Points for Pars Hardworking Arkansas Body Shop Owner Indulges His Passion With GM Rewards Purchase For years Bob Morey has used Genuine GM Parts to ensure he repairs vehicles professionally but now Genuine GM Parts are even helping him on the golf course Morey owns Bob Morey s Auto Body Inc in Bentonville AR and recently cashed in 500 Genuine GM Rewards points collected for buying qualifying Genuine GM Parts 1 EF jui Sep 2015 Servicelnsightt Morey said was looking through the golf equipment section of the reward program merchandise catalog and there it was the exact club had been thinking about buying he says It was great timing was able to get it for nothing out of pocket M GENUINE PARTS ISIGHTS Morey s new driver is helping him improve hi
29. sary The scan tool may not allow the hydraulic system service fill bleed if certain DTCs are present 2 Raise vehicle Refer to Lifting and Jacking the Vehicle Remove the left rear tire and wheel assembly Refer to Tire and Wheel Removal and Installation Remove the rear stabilizer shaft clamps and pull shaft backwards for clearance Refer to Stabilizer Shaft Replacement Disconnect high pressure line on the clutch pack 2 Refer to Limited Slip Differential Clutch Pipe Connector Disconnection and Connection Attach the DT 51381 to the high pressure line Lead the high pressure line to a drain pan 7 Remove the fill plug 1 Refer to Differential Clutch Oil Inspection Top off Rear Drive Clutch fill hole with the appropriate fluid Refer to Adhesives Fluids Lubricants and Sealers Disconnect the 049 Rear Differential Clutch Solenoid Valve 1 12 Jul Sep 2015 Servicelnsights t D rr TET h an 7 sili i le engine is operating the exhaust system will become extremely hot To prevent burns avoid contacting a Ak exnaust SYS tem 10 Start engine 11 Reconnect the Q49 Rear Differential Clutch Solenoid Valve 12 From the scan tool menu select Rear Differential Clutch Control Module then select Control Functions then Rear Differential Hydraulic Line Fill 1 Verify that fluid comes out of the high pressure line through the DT 51381 three times during the Rear Differential Hydraulic Line Fil
30. te performances behind the amazing Ski Nautique 200 the boat that has dominated the water ski world for several years 6 Jul Sep 2015 Servicelnsights a a E Pini fii GENUINE PARTS For PCM too the tournament was the ideal stage to unveil the new Gen V powered Ski Nautique 200 The Gen V delivers outstanding performance including greater fuel efficiency he says It s truly the next generation engine that s superior in numerous ways to the previous engine GM Marine leveraged its role as a presenting sponsor of the tournament to tout its ski and wakeboard boat power solutions Their display highlighted the new GM PCM power options for Nautique boats which included powering the Nautique G23 with the Gen V engine beginning with the 2016 model year GM also brought its Chevy Truck Tour to the event which treated attendees to an up close he interactive look at the features of the Silverado Tahoe Suburban and all new Colorado GM has been in the marine business just as long as the prestigious Masters Tournament and our partnership this year reflects our commitment to excellence in the sport and marine powertrains says Patrick Koenigknecht GM director of Marine OEM sales For more pictures and to read the rest of the story on Gen V Marine Debut go to gmserviceinsights com GM to Unveil Reman Turbocharger Line for Duramax Engines Visit on August 28 2015 to read the story aM GENUINE PA
31. techs are working on and Seeing in the course of their GM vehicle work he says I ve changed my approach over the years to where it s a more relaxed and less formal environment like group discussions question and answer formats and taking the approach of let s work through this stuff together It also helps that Mungle has a common bond with his audience Before moving into training he was a Cadillac GM Technical Training Class with Instructor Jerry Mungle Fw ape a eee f ti iy as 2i Bi master technician He grew up around cars too and has been involved in drag racing since he was 15 Mungle found his calling as a trainer after trying his hand as a contract instructor for the GM Training Center in Houston while working as a Cadillac tech He quickly found that he had a knack for it and joined GM as a regional instructor Based in Houston Mungle teaches GM training clinics in southern Texas and Louisiana What like most about it is helping people knowing that I ve made techs work lives a little easier and the service centers that employ them more profitable Mungle says The key to becoming a good instructor is being a good listener In a roundabout way if youre listening your audience will tell you what they need to know Knowing he cant cover topics exhaustively in a three hour clinic Mungle s primary aim is to address key knowledge points He supplements that with a discussion of the
32. ts the stop position and crimp using Kent Moore J 38125 8 or equivalent Use the crimp tool nest that corresponds to the color of the splice sleeve The handles will release when the crimp is complete 3 Repeat step 2 with the remaining wires 4 Gently tug on the wires to make sure they are securely crimped 5 Apply heat evenly from the center to the outside of the splice sleeve using a Mastertech UT 100 or UT 100si Ultratorch with hot air attachment or a heat gun capable of producing at least 500 F The sleeve will shrink around the metal clip and sealant will come out the ends of the splice NEVER use an open flame to shrink the splice sleeve APPLY HEAT if r WIRE STOP EVIDENCE OF GLUE To help prevent corrosion or fretting concerns in the future coat the terminals with dielectric lubricant GM part number 10 4071 Idle Learn Reset Procedure If there is higher than normal idle speed and high engine speed during deceleration after the throttle body is replaced or carbon is cleaned Sonsor i fedica om Soria A Und ienad ae ce a o SOc 2 Sensor 1 oleedtitcakest F 1 ansor 2 Inlicated eer si eit if i Ait from the area around the throttle blade e Performan Idle Learn Reset Some vehicles require an Idle Learn Reset procedure after throttle body replacement or cleaning using a Tech 2 GDS2 or equivalent scan tool This procedure must be performed with the key on engine off If it i
33. vicelns IND DEPENDENT SERVICE CENTERS GENUINE PARTS ACDelco m m z e a s i ies cal ss s m v a a Sa I p n Mlo 1016 CORVEHE 10G6 CORVETTE EVER More Inside rotted Service Procedures for the Corvette s W GM Unveils Reman Option for Duramax T rpoeharger oe gmserviceinsights com GM Servicelnsights Online More Genuine GM Parts resources and links Download this issue and past issues of GM Servicelnsights magazine at www gmserviceinsights com GM Servicelnsights Headquarters 2604 N E Industrial Dr 230 N Kansas City MO 64117 Email dealersupport proactgroup com We Support Voluntary Certification National Institute for AUTOMOTIVE SERVICE EXCELLENCE www ase com Compliments of your GM dealer We invite your input and suggestions Please address letters to the editor to the above address Letters submitted imply the right to edit and publish Every effort is made to ensure the accuracy of the information in the offers contained in this magazine However printing and typographical errors may occur These are not intentional and are not the responsibility of GM any dealer or the companies or individuals who create produce and distribute this magazine Offers and pricing may change at any time without prior notification The descriptions and specifications in this publication were in effect at the time of approval for printing Genera
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