GM Service Information Goes Global
Contents
1. connect E ACDelco March April 2008 Volume 15 No 2 GM Service Information When GM sold the most recent edition of the Pontiac GTO which was designed in Australia it was necessary to recreate the service manual content for North America GM Holden in Australia provided a service manual for the GTO but its layout was very different from what s in GM Service Information SI in North America It had to be converted to a familiar format that technicians knew how to use in order to make it easy to find information Multiply this situation by all of the vehicles GM sells worldwide and things could get pretty confusing As part of GM s continuing evolution as a global company changes have been made to SI recently so that it can be used by all of GM the world over No longer are there different service manual styles and layouts for the vari ous GM regions in North America Asia Pacific Europe or Latin America G TOC When using SI after selecting the year make and model followed by Select a Vehicle Publication to View the Select a Category list appears This first list of categories is the main Table of Contents A team from all of GM s worldwide rations worked together to develop new Table of Contents the G TOC if j p tea a h d b A or Global Table of Contents GM s North eering Suspension Brakes and General Information have not changed Other areas have only mino2. Connections or Circuit Testing The control modules and components will also be diagnosed during these test steps Always retest a control module or component before replace ment For example re connect all components and modules and retest the system to verify the condition still exists before replacing modules or components Thanks to Dave Nowak UCoat It floor coating systems are permanently bonded to the substrate and maintain flexural strength in extreme heat and severe cold They are designed to move with the sub strate without cracking Road salt and other abrasive materials i gt 2 as well as oil gas brake fluid and other auto motive chemli cals do not affect UCoat It finishes All that is required keep the UCoat on aai It floor looking ae eee good is routine cleaning and general maintenance Floor should be cleaned regularly and spills should not be left for extended periods of time Sales are based on the initial purchase of the UCoat It Kit designed for a 2 4 car garage with material only extender packs for larger areas Optional high gloss topcoat systems are also available in kits and material only extender packs Multiple colors and finish styles are available to fit virtually any d cor UCoat It also offers UPatch epoxy crack and floor patch and USolv an industrial strength nontoxic stain remover and degreaser All UCoat It product kits come complete with applicator tools mixing p
3. of the equivalent lamp on the opposing side of the vehicle indicates a similar performance Water Leak e Covers more than half the surface of the lamp lens e Accumulation of water in the bottom of the lamp assembly e Will not clear when the vehicle is parked in a dry environment or when the vehicle is driven with the lights on e A comparison of the equivalent lamp on the opposing side of the vehicle indicates a different performance Reverse Lamp Inoperative 2003 2008 Saab 9 3 The left side reverse lamp may not illuminate There is no power to the circuit There may be no change if the Rear Electrical Center REC is swapped The circuit for the left side reverse lamp is also tied into the rearview mirror auto dim circuit In the REC connectors H2 pin 11 and FC pin 1 are the same circuit as they are jumped together internally See the reverse lamp schematic This circuit supplies a signal to the rearview mirror to disable the auto dim feature when backing up If the REC sees any circuit shorted to ground It will disable the circuit by removing the voltage for protection The REC will continue to disable the circuit until the concern has been rectified Verity the integrity of the circuit in question for shorting to ground The rearview mirror may be improperly installed trapping the wiring between the mirror and the body pinching the wires and shorting the circuit to ground Front Suspension Noise
4. switch operation Previous Message Help Work Order Service Info Scan Tool DMM Parts Counter Messages A message points out more information is needed High Score The Diagnostic Challenge simulations are not training components and do not provide coaching points but they do reinforce good diagnostic techniques and repair skills These simulations bring the gaming aspect to life as technicians can retake the simulation as many times as they would like in order to improve their score A technician s overall score is based upon the amount of time it takes to complete the simulation while following the optimum path The optimum path is the shortest path to efficiently and quickly diagnose and complete the repair as dictated by properly following the Strategy Based Diagnosis process Each simulation begins with one hundred points One point is deducted for each choice or selection that is not part of the optimum path In addition after a predetermined amount of time one point is deducted for each minute that passes At the end of the simulation a series of questions are presented and one point is deducted for each incorrect selection Points are not deducted for using the Help tab and obtaining information on how to navigate within the simula tion or Strategy Based Diagnosis process Upon completing the simulation the overall score will appear The technicians that receive the top five scores for each si
5. 2003 2008 Saab 9 3 2004 2008 Saab 9 3 Convertible 2006 2008 saab 9 3 SportCombi A popping or clicking noise may be heard coming from the front suspen sion area It may be described as a light metallic sound typically heard while turning at slow speeds Follow normal diagnostic procedures If the noise is resonating trom the hub lower strut area remove the front backing plates dust shields and enlarge the mounting holes to prevent any bind slip stick condition from occurring Reassemble and then test drive to verify the repair Product Assistance For assistance and information regarding specitic ACDelco products contact these free information hotlines Brakes 1 888 701 6169 prompt 1 Chassis 1 888 701 6169 prompt 2 Clutches 1 888 725 8625 Litt Supports 1 800 790 5438 Shocks 1 877 466 7752 Starters and Alternators 1 800 228 9672 Steering 1 866 833 5567 Wiper Blades 1 800 810 7096 Spark Plug Wires The first high tension spark plug wires were simple strips of copper running from the distributor to the spark plugs As the lengths of copper increased it became necessary to insulate the copper wires to reduce Radio Frequency Interference RFI Radio Frequency Energy The ignition system of an internal combustion engine radiates various amounts of Radio Frequency RF energy which acts like a radio transmit ter If this energy Is not suppressed the radiated RF energy can c
6. M damage may occur if shorted to B shown functionally The serial data circuits are depicted as a dashed wire from each of the compo nents that are talking to each other The dashed wires join at a serial data symbol To see all of the circuit detail click on the serial data symbol to go to the Data Communication Schematics Ground circuits show a wire coming out of the component as a solid wire transitioning to a dashed wire connect ing to a ground symbol The dashed wire represents additional harness item detail To see all of the circuit detail click on the ground symbol to go to the Ground Distribution schematic Repair Definitions The Engine and Iransmission Transaxle categories have been updated with new repair sections for the mechanical R amp R procedures The Engine category updates go back to the 2003 model year Previous model years that have not been updated have a separate Unit Repair manual These categories have two repair sections e Repair Instructions On Vehicle e Repair Instructions Off Vehicle Repair Instructions On Vehicle covers replacement procedures A replacement procedure is the in car repair procedure including the steps required to remove all of the vehicle platform components before accessing the specific component Repair Instructions Off Vehicle presents separate procedures for removal disassembly cleaning and inspection assembly and installation for a spec
7. a variety of vehicles If you have a tough or unusual service repair the TSS Technical Assistance Hot Line can help Call 1 800 825 5886 prompt 2 to speak with a technical expert with the latest OEM information inoperative Horn 2000 2005 Saturn L Series The horn may be inoperative weak or muffled and may have been replaced previously with an updated unit These conditions may be due to water intrusion A smaller updated horn unit is available with a water deflector covering the opening Install the updat ed horn in an alternate location identi tied in the following procedure 1 If the horn has not been updated to the latest part it will need to be changed to ensure clearance in the new location 2 Remove the horn and bracket from the inner fender 3 Remove the grill New horn location 4 Using the existing bracket mount he horn to the underside of the top radi ator core support on the driver s side 5 Lengthen the wiring as needed to reach the new location Use splice sleeves from a terminal repair kit 6 Be sure the horn does not contact the condenser or grill and properly secure all wiring Exterior Lamp Condensation 1993 2008 GM passenger cars and trucks including Saturn 2003 2008 HUMMER H2 and 2006 2008 HUMMER H3 2005 2008 Saab 9 7X Some exterior lamps such as turn signal lamps headlamps or tail lamps may have very small droplets of water a fine mist or white fog condensat
8. ail clean up items product instructions and a video DVD demonstrating preparation and application For more information call 1 248 545 4055 or visit www UCoatlt com Thanks to Staci Shelton r Y 4 Certification Tests Automotive Professionals Don t miss the opportunity to take ASE s Certification Tests Register by March 31 2008 Testing on May 8 13 and 15 2008 Over 750 Sites throughout U S and Canada ASE 7 CERTIFIED Register by mail online or by toll free telephone Contact ASE Customer Service at 703 669 6600 ASE 101 Blue Seal Dr 5 E Suite 101 Leesburg VA 201 75 Toll free recorded information 1 888 ASE TEST 273 8378 Register online at www ase com Test Your Diagnostic Skills on the ACDelco LMS Just like the real thing the new ACDelco Diagnostic Challenge simulations available on the ACDelco LMS put technicians ability to diagnose and repair a vehicle to the ultimate test The new simulations are designed to replicate the diagnostic process used by technicians in the service center and all the necessary Service Information tools and parts are provided The four simulations currently available cover the HVAC system brake system electrical system and engine performance As with real life diagnosis the simulated workstation is dependent on the technician s ability to diagnose the concern and complete the repair The simulation allows the user to freely navigate anywhere on th
9. ause interference and disruption of the radio headlight dimmer garage door opener or other sensitive electronic devices The best defense against RFI in the ignition system combines TVRS Television Radio Suppression cable or wire wound cable in the spark plug wires with ACDelco s resistortype spark plugs TVRS Cable RFI that is transmitted from the plug wires comes from the instantaneous discharge of the high voltage as it arcs across the spark plugs The wires then act as antennas to transmit the resulting RF energy into the surrounding under hood area To suppress RFI and increase performance early plug wires traded copper for carbon as a conductor The carbon impregnated fiber or wire core helps suppress RFI because the high resistance makes the wires ineffective antennas High resistance in the spark Training How to Take ACDelco Training Go to acdelcotechconnect com and click on the Training tab to log on to the ACDelco Learning Management System LMS e To enroll in an Instructor Led Training ILT course click on the Enrollment link or the Instructor Led Courses link e To launch a Web Based Training WBT course click on the Web Based Courses link to view the catalog and select a specific course e To launch a TechAssist TAS course click on the TechAssists link to view the catalog and select a specific course Current Instructor Led Training ACDelco s Instructor Led Training ILT cou
10. ce Computer Controls and Ignition System S EP08 03 01ILT Engine Performance Air Induction and Fuel System Diagnostics S EP08 04 01ILT Engine Performance Fault Monitoring and Emission System Diagnostics S EP08 12 01ILT OBD II GM Diagnostics S EP08 81 01ILT_ Duramax 6600 Diesel Engine Performance S SS04 01 01ILT Vibration Correction Diagnostics S ST10 01 01ILT Supplemental Restraint Systems
11. e screen during diagnosis As you progress through the simulation you need to think of what the next step is just as you would do when working on a vehicle in the shop The Virtual Shop Upon starting each simulation a short narrated animation describes and identifies how to navigate within the simula tion and use the various functions Virtual tools are available to help in the diagnostic and repair process just as in a shop environment The simulation uses tabs on the screen that provide access to Service Information the work order tools including a scan tool digital multimeter refrigerant pressure gauge set and others and the parts counter where you can order parts that you think should be replaced HVAC System Diagnostic Challenge Using a digital multimeter in the simulation Just as the appropriate tools and paths are provided within the simulation other paths and tools are provided that are not part of the optimum path for the given scenario Because the simulations are not training components minimal or no feedback is given when an incorrect selection is made However if a technician strays too far from the Strategy Based Diagnosis path or attempts to install a replacement part without properly diagnosing the concern a message offering suggestions may appear during the simulation HVAC System Diagnostic Challenge l ee Verify and Pre Checks Pressure Gauge _ Messages You must verify the
12. eplacement R amp R procedures are located here Repair Verification This category will be used only when the Diagnostic Repair Verification procedure in Repair Instructions does not adequately verity Scan Tool Data Example from an ECT procedure ECT Sensor Temperature PCM Circuit Short to Ground Operating Conditions Engine Running 26 to 275 F 40 C 40 F 140 C 284 F Low Reference po 40 C 40 F Parameter Normal Range 32 to 130 C ECT Signal the repair A unique verification proce dure will be provided to support the diagnostic repair Schematics The new global service schematics format significantly based on today s familiar schematics is built to work in conjunction with the new diagnostic format Circuit function symbols are not new but usage is more frequent There are five core circuit types within diagnos tics The circuit function symbols align with those circuit types Circuit Type Definition Symbol Voltage Class 2 Serial Data UART Signal Signal Control Control Ground Subsystem Circuit Details Short to Power supply circuits Voltage ia ae aie show all aspects of the circuit that may affect the subsystem s functionality To see all of the circuit detail click on the fuse symbol to go to the Power Distribution schematic 4 0 C 40 F 0 C 40 F 4 Serial data circuits are ECM if sh B i Internal EC
13. es Strategy Based Diagnosis and Diagnostic Procedure Instructions Diagnostic Fault Information The Diagnostic Fault Information table identifies each circuit that makes up an electrical subsystem and the associ ated circuit failure modes DTCs and symptoms are listed in the table for all circuit failure modes Typical Scan Tool Data A table showing a scan tool data parameter value in reference to circuit failure modes Reference Information Links providing additional information for the diagnostic procedure such as schematic Reference Connector End View Reference Description and Operation and Scan Tool Reference Circuit System Verification A non intrusive description outlining how to verify that a system or a portion of a system is functioning correctly During the verification process the vehicle is kept intact and tested as a complete system This verification is used to help in locating a current or an intermittent condition Component Testing This category will offer when applicable a static and or dynamic component test These tests can be used to verify if a component is not operating properly to avoid unnecessary replacement If the component cannot be tested in a static or dynamic way an output control using a scan tool can be specified Repair Instructions A link to Diagnostic Repair Verification that describes how to verify the vehicle is repaired All links to Repair or R
14. go to Training Log on to ACDelco LMS go to Resources TechConnect Magazine Online Strategy Based Diagnosis Provides an Action Plan The idea behind Strategy Based Diagnosis is to provide a common plan of action for each specific diagnostic situation Following a similar plan for each repair provides an efficient way to diagnose and repair all tyoes of conditions The Strategy Based Diagnosis chart lists eight diagnostic steps Check Identical Vehicle Und Jandia ihe SC System Explain operation to customer or refer to owners or 2 f service manual Vehicle Operating as Designed Preliminary Checks Visual and Operational Perform Diagnostic System Check Vehicle Identify what category of diagnostic to perfarm Check for related Bulletins Recalls and Preliminary Information Current DTC Symptom No DTC Follow DTC Follow Analyze and See Diagnostic Diagnostics Symptom Develop Detail Diagnostics Diagnostics or Below Call Technical Assistance No Published Diagnostics Intermittent History DTC isolate the Root Cause Re Examine Then the Concern Repair and Verify Fix 1 Understand and verify the customer s concern by obtaining as much information as possible from the customer 2 Compare with another like vehicle that is operating normally under the same conditions described by the customer to determine if the vehicle is operating normally 3 Conduct a thorough visual inspecti
15. grade epoxy and urethane products with chemical resistance and abrasion resistance properties In automotive service areas and other high traffic high abuse areas the service life is typically 10 years before a recoat is required Circuit System Testing Here are some tips to help you understand how to read diagnostic steps when you are performing circuit or system tests found in GM Service Information Circuit System Testing is arranged to allow you to perform each test step in sequence until a fault is detected If the result of a test step is achieved the normal flow is to proceed to the next step If the result is not achieved the repair arrow bullet will identify what actions need to take place Intrusive diagnostics are performed to locate the system fault For instance system harness connections are disconnected from the module or component to test individual circuit functions The module or component will be used to assist in verifying the circuit function When a test does not pass the repair steps gt will indicate what circuit faults to test For example short to voltage short to ground or open high resistance When testing for individual circuit faults you are expected to include terminal inspections such as connection surfaces and terminal tension at both the harness and component or module Additionally you can use the links in Electrical Information Reference Testing for Intermittent Conditions and Poor
16. ide com Jim Horner E mail lt jhorner goworldwide com Production Manager Marie Meredith Desktop Publishing Supreme Graphics Inc E mail lt supremeinc supremeg com Write to DX ACDelco TechConnect PO Box 500 Troy MI 48007 0500 On the Web To read and search recent issues of TechConnect online Go to acdelcotechconnect com click on Training Log on to ACDelco LMS click on Resources Click on TechConnect Magazine Online ACDelco service tips are intended for use by professional technicians not a do it yourselter They are written to inform those technicians of conditions that may occur on some vehicles or to provide information that could assist in the proper service of a vehicle Properly trained tech nicians have the equipment tools safety instruc tions and know how to do a job properly and safely If a condition is described it cannot be assumed that the information applies to all vehi cles or that all vehicles will have that condition All materials and programs described in this magazine are subject to change Submission of materials implies the right to edit and publish Inclusion in the publication is not necessarily an endorsement of the individual or the company TechConnect is published for ACDelco by Sandy Corporation Troy MI 2008 ACDelco All rights reserved GM Service Information Goes Global continued from page 1 integrated system dependenci
17. ific component For the most part these procedures can be followed top to bottom to perform a complete overhaul Technicians should use their judgment when deciding which procedure to fol low It may not be necessary to perform every procedure based on the repair that needs to take place If a crankshaft is being replaced for example you may not need to remove the cylinder head The changes made to the Service Information offer a number of efficien cies for technicians enabling quick and effective diagnosis and repairs Going global means better service information for all GM vehicles no matter where they were designed Thanks to Dave Nowak and Lou Winters Save with UCoat It Epoxy Floor System Discount UCoat It is a durable commer cial grade epoxy floor coating that can give automotive service cen ters a clean professional look The rugged good looks of the UCoat It floor system deliver on value too when you consider that ACDelco offers TSS service centers a 10 discount on UCoat It products The UCoat It product line features floor coating systems floor preparation and cleaning items UCoat It floor systems have been installed at automotive dealerships independent service centers and in the shops of many professional race teams including ACDelco Pro Stock driver Kurt Johnson s race shop in Sugar Hill Ga The floor coating sys tems come with a limited lifetime warran ty and feature commercial
18. ion on the inside of the lamp lens This may be more noticeable on lamps with multi lens designs and may be normal during certain weather conditions Before service it must be determined if the lamp shows signs of normal condensation or a water leak Condensation occurs when the air inside the lamp assembly through atmospheric changes reaches the dew point When this takes place the moisture in the air within the lamp assembly condenses creating a fine mist or white fog on the inside surface of the lamp lens Most exterior lamps on GM vehicles use a vented design and feature a replaceable bulb assembly They are designed to remove any accumulated moisture vapor by expelling it through a vent system The vent system operates at all times however it is most effec tive when the lamps are on or when the vehicle is in motion Depending on the size shape and location of the lamp on the vehicle and the atmospheric conditions occurring the amount of time required to clear the lamp may vary from 2 to 6 hours Completely sealed headlamp assemblies sealed beams require the replacement of the complete lamp assembly if a bulb filament burns out Condensation e May be located primarily in the lens corners near the vents and should not cover more than half the lens surface e Should clear of moisture when the vehicle is parked in a dry environ ment or when the vehicle is driven with the lights on e A comparison
19. isual inspection of the spark plug wires should include checking for e Breakdowns in the insulation in cluding the heat shields on the boots e Oxidation on the terminal connections e Poor terminal connection A resistance test also can be performed to check the conductivity of the wire Perform the test while flexing the wire Look for high resistance or an open circuit The resistance test Is a Static test The resistance will change dynamically when the spark plug is operating An oscilloscope may be able to pick up the change by monitoring the voltage In general carbon or silicone spark plug wires will measure 5 000 ohms per foot or less when doing a Static resis tance check Wire wound cables will measure lower resistance fewer than 1 000 ohms per foot Spark plug wires should be replaced any time they show physical damage such as cuts chafing scorch marks or signs of external arcing Ultimately a single open spark plug wire can lead to a failed ignition coil or ignition control module For more information on spark plug wires and ignition systems two available Web Based Training courses on the ACDelco LMS are S EP08 01 01WBT Powertrain Performance 1 and S EP08 02 01VVBT Powertrain Performance 2 Thanks to Mike Militello Automotive Air Conditioning Advanced Refrigerant System S EPO8 O1 01ILT EPO8 01 01ILT S EP08 01 01ILT_ Engine Performance Engine Performance Engine Performan
20. mulation will have their score shop name and location posted to the Simulation Scoreboard on the LMS To view the top score click on the View the Simulation Scoreboard link located on the LMS training Home page Simulations The diagnostic simulations are accessible via the catalog search function on the LMS For example using the Course Name and Contains parameters and searching for challenge or selecting the course delivery type Simulation will locate the four simulations The simulations are S ACO7 01 01SIM HVAC System Diagnostic Challenge S BK05 01 01SIM Brake System Diagnostic Challenge S ELO6 01 01SIM_ Electrical System Diagnostic Challenge S EP08 01 01SIM Engine Performance Diagnostic Challenge Are you ready for the challenge Thanks to John Beggs Auto Show Season Auto shows are like automotive holidays And with most holidays they come and go before you know it At Los Angeles Detroit Chicago and New York along with many additional smaller shows around the country and Tokyo Geneva and others around the world GM has introduced a number of exciting new models recently Some of these vehicles will be in showrooms soon which means they ll be in your service centers for maintenance and others are concepts that won t be on the road for a few years Chevrolet Corvette ZR1 This one is no auto show con cept The Corvette ZMT is slated for a limited production run of about 3 000 uni
21. on and gather Diagnostic Trouble Code DTC information 4 Perform the Diagnostic System Check published in the Service Information This will help verify the proper operation of the system in question 5 Check for related bulletins and Service Information 6 The four diagnostic categories offer repair guidelines based on if DTCs are set if Service Information is available and intermittent conditions Intermittent conditions may require the help of other experienced techni cians evaluating vehicle conditions testing for faulty electrical connections and wiring and capturing data using a scan tool 7 After isolating the root cause make the repairs and validate correct operation by verifying that the DTC or symptom has been corrected This may involve road testing the vehicle 8 If the condition can not be isolated re verify the concern It could be an intermittent or normal condition Refer to the Diagnostic Navigation section of GM Service Information for more tips on vehicle diagnosis Thanks to Mike DeSander ACDelco TECH ACDelco TechConnect is published bi monthly for retail technicians to provide timely service information increase knowledge and improve the performance of the TSS service center Publisher Dennis Kissack ACDelco E mail lt dennis c kissack gm com Editor Mike DeSander ACDelco E mail lt mike desander gm com Technical Editors Mark Spencer E mail lt mspencer gpworldw
22. over that is based on GM s E Flex architecture that debuted with the Chevy Volt The Provog combines the fuel cell system with a lithium ion battery that can drive 300 miles on a single fill of hydrogen with 280 miles from hydrogen and 20 miles on battery electric power The Provoq features a solar panel integrated in the roof to helo power onboard accessories Fendermounted charge ports allow overnight plug in charging to extend the vehicle s driving range Cadillac CTS Coupe The CTS Coupe concept is an expres Sive sports coupe that features sculpted body work and signature design cues from the award winning CTS sedan The coupe has the same wheelbase as the sedan but is lower and shorter overall Two possible engine choices that the CTS Coupe could accommodate are the 3 6L direct injection V 6 and a new 2 9L turbo diesel currently in develooment HUMMER HX The HX concept may be the next com petitor of the Jeep Wrangler It has a removable roof fenders and doors along with full time AWD front and rear locking differentials and 35 inch tires The HX is powered by a FlexFuel 3 6L direct injected V 6 For more photos of the latest models making the rounds on the auto show circuit go to our website TechConnect Magazine Online by clicking on the Resources link on the ACDelco LMS Thanks to The following technical tips provide repair information about specific conditions on
23. r changes The big change Is in the Body area The new SI G TOC for 2007 and beyond Includes e Bulletins by Category e View All Bulletins e Campaigns e Preliminary Information e Preface e General Information e Body Hardware and Irim e Body Repair e Body Systems e Brakes e Diagnostic Navigation e Driveline Axle e Driver Information and Entertainment e Engine e HVAC e Power and Signal Distribution e Roof e Safety and Security e Seats e Steering e Suspension e Transmission Transaxle Diagnostic Categories The new diagnostic approach offers more information fewer words better formats and fewer pages to print The diagnostics are now written so you can use your knowledge and experience to decide the quickest method to repair a vehicle The new or updated diagnostic categories are Diagnostic Instructions Links to the Diagnostic System Check Vehicle procedures to help prevent misdiagnosis where there are continued on page 3 IN THIS ISSUE GM Service Information Goes Global e 1 Strategy Based Diagnosis Provides an Action Plan gt 2 Save with UCoat It Epoxy Floor System Discount 7 4 Circuit System Testing nnannnnnn 4 ASE Certification Tests 7 4 Test Your Diagnostic Skills on the ACDelco LMS 5 Auto Show Season 7 6 Tech Tips ene 7 Spark Plug Wires 8 Training Update ee 8 ON THE WEB acdelcotechconnect com
24. rses pro vide hands on instruction with the latest automotive systems The following ILT courses are currently being held at training center locations around the country TS PU 0006 08 plug wires will slow down the energy build up to ionize the spark plug gaps Wire Wound Cable An alternative to TVRS cable is wire wound cable which can be more effec tive at reducing RFI The wire wound induction cable makes it possible to reduce series resistance while still main taining RFI suppression The reduction in series resistance allows more of the coil energy to be supplied to the spark gap Essentially the lower cable resis tance provides a hotter spark longer Spark duration and cooler operation INSULATING JACKET RAYON BRAID INSULATING MATERIAL CONDUCTIVE NEOPRENE RAYON BRAID CARBON IMPREGNATED LINEN STRANDS TVRS cable Suppression in a wire wound core is due to the magnetic field that is created around the core when the spark is jumping the gap The energy in the magnetic field prevents any other electromagnetic energy from radiating until the magnetic field has collapsed Plug Wire Testing Because of its construction spark plug wire cable can be damaged by grabbing and pulling it away from the spark plugs Rough handling can separate the con ductive strands from the center terminal An open circuit poor conductivity excessive resistance or a spark plug misfire is the usual result A v
25. ts It features a supercharged 6 2 liter V 8 producing approximately 620 horse power and 595 pounds feet of torque making it the most powerful and fastest car ever produced by GM To top it off highway fuel economy is expected to be just above 25 mpg The front fenders and hood are made of carbon fiber The hood features a raised polycarbonate window with a view of the intercooler Start saving now however the ZR1 will be priced around 100 000 Saturn VUE Green Line 2 Mode The VUE 2 Mode is the first front wheel drive vehicle with GM s two mode hybrid technology It will deliver an estimated 50 fuel economy increase over the non hybrid V 6 VUE and have a driving range of more than 500 miles with no trade offs in performance from the 3 6L VVT V 6 with direct injection The two mode system uses twin active cooled electric motors integrated into the automatic transmis sion that maximize city and highway fuel economy through two electric continuously variable modes and four fixed mechanical gear ratios It is also classified as a Partial Zero Emissions Vehicle PZEV in states that have adopted California s emissions rules Production is expected to begin in late 2008 Saturn also introduced a VUE plug in hybrid concept that features a plug in battery that recharges from 110 volt house hold electrical outlet in four to five hours Cadillac Provog The Cadillac Provog concept is a hydrogen fuel cell cross
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