Quadrasteer™ Rear Wheel Steering Introduced
Contents
1. A monthly publication for GM Dealership Service Professionals December 2001 Volume 3 No 12 Quadrasteer Rear Wheel Steering Introduced A revolutionary new rear wheel steering system Is standard equipment on the 2002 GMC Sierra Denali pickup truck Quadrasteer reduces the diameter of the turning circle by 3 m 10 feet so it s comparable to that of a compact car In addition it contributes to stability on the highway and maneuverability when towing a trailer All of this is accomplished by a rear axle mounted rack and pinion steering gear ope rated by a computer controlled electric motor Operation Quadrasteer operates in three phases Negative Phase At low speeds up to 72 kph 45 mph the rear wheels steer in the opposite direction of the front wheels Neutral Phase At moderate speeds about 72 kph 45 mph the rear wheels remain straight This is also the failsafe ohase in case of system problems continued on page 3 Techline News In the April 2001 issue of TechLink you learned that the days were numbered for the 10 MB megabyte card in your Tech 2 With the ever expanding use of on board computers there s no longer enough room on the 10 MB card Beginning last April all new Tech 2s are being shipped with a new 32 MB card installed Also each dealership received one J 45080 32 MB card to replace the 10 MB card see the 32 MB article in the April 2001 issue of Te2. Thanks to Mike Ondre Return to page 1 Allison LCT 1000 Transmission The Allison LCT 1000 Automatic Transmission is offered in 3 4 and 1 ton C K trucks with the 8 1L gas and 6 6L Duramax diesel engines This rugged transmission offers 5 forward speeds 1 reverse and provision for a power takeoff The forward and reverse gear ratios are accomplished by five clutches the Allison is unique in having no bands no sprags and no roller clutches Transmission performance is controlled by 6 solenoids operated by the Transmission Control Module TCM which is linked by a class 2 data line with the Powertrain Control Module PCM Operating Characteristics From these unique features you can guess that the Allison transmission may also have some unique operating characteristics In fact it does And a customer who is familiar with only a lighter duty drivetrain may interpret perfectly normal operation as a cause for concern You can avoid unnecessary diagnosis and repairs if you understand the reasons behind these characteristics Here are some highlights Hum at idle is normal It s caused by the gear pump moving a large amount of fluid at a fairly high flow rate to provide adequate lubrication and cooling for moving parts TIP The owner s manual states the Allison should not idle in gear for more than 5 minutes to avoid the possibility of overheating Gear noises are normal for this type of transmission The
3. Thanks to Russ Gilbert Paul Gallo and Trip Bonds Proper Removal of Oz Sensors This applies to all vehicle lines and model years and is about proper oxygen sensor removal techniques Some of the oxygen sensors returned to the Warranty Parts Center have been damaged during removal sensor suppliers have extensive test procedures which include installing the components in a vehicle to determine the root cause of failure Typical Cut Wire In one recent sampling of 27 returns 7 sensors had the wiring pigtail cut off at or near the grommet An additional 9 sensors had wires torn or damaged from use of a conventional socket during removal With these damaged sensors analysis was impossible defeating the purpose of the Warranty Parts Return program There are a variety of special tools and slotted sockets available for oxygen sensor removal which will not damage the pigtail If space allows a crowfoot wrench is also appropriate A suitable tool is needed for installation of the new sensor using it for removal as well will eliminate damage the wires on the sensor being removed To give you an idea why It s important to avoid damaging oxygen sensors being returned here s how a recent driveability condition was diagnosed using undamaged returned sensors The condition was the high incidence of P0133 codes Slow Front O2S Response Time on 2 2L LN2 engines in Cavaliers and Sunfires Diagnosis in the dealership le
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5. This type of test lamp substitutes a light emitting diode LED in place of the incandescent light bulb In addition to Its decidedly modern look the LED offers extended bulb life But there s a real problem when you use the LED in certain kinds of circuits Because these test lamps draw very little current only 5 20 milliamps there are occasions when using an LED could give erroneous test results It s possible that a very high resistance circuit corroded terminals or a bad output driver transistor inside a control module to name a few might provide enough current to Illuminate the LED giving a false indication that the circuit is OK Under the same circumstances an Incandescent test lamp would not light correctly indicating a problem in the circuit For this reason GM does not endorse use of the LED test lamp to perform any test presented in SI 2000 New J 35616 200 12v Test Lamp The new J 35616 200 test lamp has been developed to address some specific service needs The body of the tool and the test lead terminate in banana plugs This permits you to interchange what goes on each end The kit includes an alligator clamp and a pointy probe But the real value of this new lamp is that you can install any of the terminals from J 35616 A Connector Test Adapter kit With this setup you to plug the test lamp directly into the circuit minimizing the possibility of damaging a terminal during the test If you
6. capable of storing personalized settings for each of three different drivers These include audio presets for bass and treble as well as navigation features For instance each driver can store 60 memory points and can file them in pre detined folders for business entertainment personal etc Each driver can specify display and map view characteristics as well Voice Recognition control button on steering wheel Return to page 1 Diagnostic Menu display Diagnosis Menu P enm o o a el Navigation Info 1 i VO is lt r ka Software Clear S s ai r C 7 M in X ie ee _ bi na ip S z z i TIP Because the DVD system uses a third party data base coverage detail varies with location Roads are visible essentially everywhere in the US Voice guidance and road detail are available only in detailed map areas The system is capable of displaying both 2 D and 3 D map views and 2 D and 3 D intersection guidance When a route is plotted the driver can specify 5 waypoints permitting multiple stops on the trip The display offers smooth and rapid zoom and scroll features A web site will be set up later in the year for map coverage information TechLink will provide the web address when it becomes available Service Issues Diagnostic and repair information can be found in SI 2000 under Body and Accessories then selecting Navigation systems Here you will find in
7. gm com General Motors service tips are intended for use by professional technicians not a do it yourselfer 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 technicians have the equipment tools safety instructions and know how to do a job properly and safely If a condition is described do not assume that the bulletin applies to your vehicle or that your vehicle will have that condition See a General Motors dealer Servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information Inclusion in this publication is not necessarily an endorsement of the individual or the company Copyright 2001 General Motors Corporation All rights reserved Return to page 1 continued from page 1 Positive Phase At high speeds above 72 kph 45 mph the rear wheels turn the same direction as the front wheels The Quadrasteer control module determines the phasing and amount of rear wheel steering based on the mode switch setting position of the steering wheel and vehicle speed Operating Phases TYPICAL ALGORITHM Vehicle Speed kph Oo pz o D p pa pe Ww O i LL SS _ a a Negative Phase Neutral Phase When moving forward the rear wheels can steer up to 12 degrees While stand
8. 6 04 037 Fuel Transfer Pump Inoperative Replace Fuel Transfer Module various specified 1990 2001 Chevrolet and GMC Trucks with Dual Fuel Tanks 01 06 04 045 Revised Part Name Nomenclature 2000 Chevrolet Corvette with 5 7L Engine TRANSMISSION TRANSAXLE 01 07 29 005 Eaton and Spicer Manual Transmission Unit Repair Information 2002 and Prior Chevrolet and GMC Medium Duty Trucks with Eaton or Spicer Manual Transmissions BODY AND ACCESSORIES 00 08 50 014A replaces 00 08 50 014 Driver s Power Bucket Seatback Movement During Braking Replace Seatback Recliner Assembly and Bolts 2000 Chevrolet and GMC C K Pickup and Utility Models 01 08 44 011 CD Cannot Be Inserted Into CD Player or Ejected Reset Radio 2002 Chevrolet Cavalier Impala Malibu Monte Carlo Venture Oldsmobile Alero Intrigue Silhouette Pontiac Montana 01 08 44 012 Radio Bass Level Too High Adjust Bass Level Using Tech 2 2001 02 Chevrolet Impala Monte Carlo 01 08 49 015 Understanding Driver Information Center Personalization Language Options 2002 Chevrolet and GMC S T Utility and Oldsmobile Bravada 01 08 50 010 Seat Back Recliner Replacement 1998 2000 Chevrolet and GMC S T Models Oldsmobile Bravada 01 08 50 011 Memory Power Seat Inoperative Replace Memory Seat Module with New Design Module 2002 Chevrolet and GMC S T Utility Models Oldsmobile Bravada 01 08 51 003 Application of Anti Corrosion Materials 2002 and Prior P
9. assenger Cars and LD Trucks 01 08 51 004 Premature Aluminum Hood Corrosion Blistering Refinish 1997 2001 Chevrolet Venture Oldsmobile Silhouette Pontiac Montana 1997 98 Pontiac Transport 01 08 56 004A replaces 01 08 56 004 Security Lamp Illuminated on the IP Engine Stalls No Start DTC B2960 Security System Sensor Data Incorrect but Valid Set Inspect and Repair Cause of DTC B2960 1998 2001 Chevrolet and GMC C K Pickup and Utility 2001 Chevrolet and GMC C K 3500 HD Pickup 1999 2000 Cadillac Escalade 01 08 61 005 Poor Ride Quality Replace Front Body Mounts 1990 2001 Chevrolet and GMC H6 7 C Series Conventional MD Models 01 08 62 002 Protective Bumper Coating Applied to Prevent Stains 2002 Chevrolet Tracker LT 01 08 64 014 Door Manual Lock Lever Disengages from Door Trim Panel Repair Lock Lever 2002 Cadillac Escalade 1999 2002 Chevrolet and GMC C K Pickup Models and C K Utility Models 2001 02 GMC Denali 01 08 64 015 Front and Rear Side Access Door Noise Replace Door Check Link 1999 2002 Chevrolet and GMC C K Pickup Models 2000 02 Chevrolet and GMC C K Utility Models 2001 GMC C3 Sierra 2002 Cadillac Escalade 01 08 66 008 Release of New Pickup Box Side Panel Rear Braces 1999 2001 Chevrolet and GMC C K Pickup Models with Steel Wideside Pickup Box RPO E63 01 08 66 009 Creak in the Rear of the Vehicle Install Rivets 2001 02 Chevrolet Venture Oldsmobile Silhouette Pontiac Montana
10. chLink on the service gm com website The Tech 2 requires a linear flash card The low priced 32 MB strata cards available on the internet will not work The new 32 MB card Is shipped with Startup software installed and should be inserted in Slot 1 closest to the screen When updating the 32 MB card for the first time and using TIS 2000 remember to select the Custom Mode You MUST have the 32 MB card installed before updating your Tech 2 again The update will be broadcast on GM ACCESS on January 14 2002 and will be included on CD no 1 for 2002 shipped on January 17 2002 This update WILL NOT fit on the 10 MB card What Will Happen to the 10 MB Card It s recommended that you keep the continued on page 2 FO Re RAD DS SERN ON pes EAER py Kasy Pi t Das EKLE gt Quadrasteer Rear Wheel Steering Introduced 1 Techline News 32 MB Card Making a Duplicate Card Freeze Frame Class 2 Tip of the Month DVD Navigation System for 2002 Proper Removal of 02 Sensors Top Post Battery Introduced Tech Tips Park Brake Specifications Noise in Strut Support Ignition Key Binds Cruise Control Switch Inoperative AWD Rear Drive Axle Fluid Requirements 6 Allison LCT 1000 Transmission Test Lamp Technology Bulletins eM Service Operations continued from page 1 latest update on the card until told to do otherwise GM Service Operations recently conducted a survey of Tech 2 users asking for ideas about what
11. channel Channel 22 The course covers operational characteristics diagnostic techniques software adaptives and TCM programming The IDL course 17340 13D Allison LCT 1000 Automatic Transmission Diagnostic Close Up offers a 3 hour interactive session It provides instruction on hydraulic operation and electronic controls and an insight into driving impressions Using the information in this program you will be able to validate customer concerns as internal to the transmission external to the transmission or normal operation for the vehicle There s also the Selling Tips and Considerations video which tells about normal operating characteristics of transmission Although it was provided as sales information technicians may find the operating condition descriptions and sound effects useful Thanks to Ben Lee and Meg Travers Test Lamp Technology Despite all of the high tech equipment installed on today s vehicles and the high tech test equipment that s available to test them there s one decidedly low tech tool that s still popular and required to perform many electrical tests the 12v test lamp The typical test lamp consists of a handle with a pointy probe a test lead with alligator clamp and a 12v incandescent light bulb that illuminates when It s placed in a circuit But even the basic 12v test lamp has undergone some recent developments which you should know about LED Style Test Lamps
12. d to replacement of the oxygen sensor However analysis and testing of returned sensors revealed some degree of contamination but most of the sensors were functional Further analysis revealed that the diagnostic software for P0133 was causing functioning sensors to fail the test This discovery resulted in the release of new service calibrations with revised P0133 diagnostics thanks to the returned sensors Thanks to Rich Burrell Wire Torn by Use of Improper Socket Return to page 1 Top Post Battery Introduced A new top post battery has just been introduced on the 2002 Buick Park Avenue In the past a pair of transition blocks were used on side terminal batteries to provide battery cable connections These were needed due to underhood geography Using a top post battery eliminates the need for these adapters Each cable is equipped with a clamp that attaches to the respective battery post Tighten the battery cable nut to 4 N m 35 Ib in The positive terminal is also equipped with a protective cover Whether servicing these new top post batteries or the familiar side post batteries follow good safety practices Thanks to Bob Harris Noise from Stones in Strut Support some owners of 1999 2002 Chevrolet Trackers may comment about a creaking or popping noise coming from the front Suspension area over bumps or in tight turns It is possible for small stones thrown trom the two front ti
13. es using the display screen TIP The single CD slot in the navigation system is in addition to the conventional CD changer located elsewhere in the vehicle While underway the system provides 4 audible voice prompts so the driver needs to glance at the map only when necessary and it is safe to do So TIP The audible prompts are available in English German Spanish French and Japanese The navigation system provides voice recognition for hands free operation of nearly every feature of the navigation system radio CD player and DVD player This feature operates in the same way that the UV8 hands free cellular telephone option works A oress of a steering wheel control button activates voice recognition The system picks up voice commands through a microphone mounted in the rearview mirror Issues voice prompts through the vehicle audio system and controls system functions The system will mute the radio during the voice recognition process The voice commands include HELP prompts which may be activated at any time After hearing the system s READY prompt a driver may say MAP HELP and the system will state all commands available for manipulating the map Then saying ZOOM OUT for example while voice recognition is still active causes the system to perform that navigation map command After a few seconds of silence the voice recognition feature times out and radio or CD play resumes The DVD Navigation System is
14. formation about the system s self test Enter the self test by pressing and holding the audio adjust button until the keypad is displayed Enter 1971 by touching the corresponding numbers displayed on the touch screen The main portion of the self test that you will use in diagnostics is the screen that shows Satellite reception This screen is also referenced in SI2000 when diagnosing No GPS Reception TIP To obtain a replacement DVD Navigation System radio call Soecmo at 1 800 545 7910 to arrange an exchange unit You need to call Specmo directly as your local exchange center may not be familiar with this system TIP A customer may comment that there are no voice prompts in some rural areas Point out that if the vehicle travels into an area which is non detailed on the map the system continues to track the location but will not provide voice prompts until it is back in a detailed area of the map If there is no GPS reception the navigation radio will set DTC B2462 when an open or a short is detected between the GPS antenna and NAV radio If no DTC is set and there is no GPS reception refer to NAV self test perform the following while monitoring the GPS Information screen Ensure the vehicle is parked in an open area free of any obstructions Inspect the rear widow glass for tint or other obstructions Remove the GPS antenna and place outside of vehicle Refer to SI 2000 for additional steps
15. ich is also used by OnStar TIP Although both the DVD Navigation system and OnStar use GPS technology they have separate antennas The navigation system GPS antenna is located in the rear parcel shelf where it has an unobstructed view of the sky When the driver inputs a destination the equipment Is able to provide turn by turn guidance using both voice and map In non detailed areas only map displays are available ir oS ah eS z Enhanced Feature The driver and navigation system communicate with each other using a 6 5 inch color VGA touch screen which is considerably larger than last year s model For 2002 the navigation system consists of a single instrument panel mounted module instead of two modules as in past years The display screen contains controls for the radio CD player and DVD player The programming features of the navigation system are accessible only in Park so the driver must program the desired route before driving off Ot ner To use these other features the navigation DVD must be removed Access to the DVD player is gained by pressing a hard key which causes the display screen to tilt open The hard key operates only with the transmission in Park Press the hard key a second time to close the player do not close it manually The system will play conventional CDs any time the navigation feature is not in use And when the shift lever is in Park it will play DVD movi
16. ing still or in reverse the rear wheels can steer up to 5 degrees A feedback signal is sent from the rear position sensor on the rack and pinion gear to confirm rear wheel position TIP A yaw rate and lateral accelerometer sensor is used only to monitor system behavior its output is not used for operation Mode Control Switch Driver Control A mode switch on the instrument panel allows the driver to select from three modes 2 Wheel Steer in which only the front wheels steer 4 Wheel Steer in which rear steering is enabled 4 Wheel Steer Tow in which rear steering is optimized for towing At high speed this mode provides more positive phase steering than the normal 4 wheel steering and at low speed similar negative phase steering as the normal 4 wheel steering mode For maximum benefit 4 Wheel Steer is the recommended setting under most conditions Detailed diagnostic procedures are Included in SI 2000 and you should always follow the steps in the order published Because Quadrasteer is part of the vehicle s serial data system you ll use your Tech 2 to look for diagnostic codes TIP The handwheel steering wheel position sensor provides four different outputs to the control module One is analog and three are digital These outputs indicate direction speed and amount that the steering wheel is being turned Positive Phase TIP Ordinarily only one mode indicator lamp Is i
17. irebird Firehawk 2001 2002 Camaro RS and Firebird GT 01 00 89 015 Dealer Installed RPOs and RPAs 2001 and Newer Passenger Cars and LD Trucks HVAC 01 01 38 010A replaces 01 01 38 010 Noise When A C Selected and Rear Fan On Replace Auxiliary Thermal Expansion Valve 2001 Chevrolet Venture Oldsmobile Silhouette Pontiac Montana with Rear Auxiliary A C RPO C69 01 01 39 004 A C Not Cold Enough A C Blows Warm Air with Vehicle at Extended Idle Install Auxiliary Electric Cooling Fan 2000 02 Chevrolet and GMC C K Utility Models 2002 Cadillac Escalade with 6 0L Engine VINs U N RPOs LO4 LO9 STEERING 01 02 32 009 New Power Steering System Analyzer Adapters from Kent Moore 1999 2002 Chevrolet Tracker with 2 0L or 2 5L Engine VINs C 4 RPOs L34 LE8 01 02 35 007 Ignition Key Binds in Accessory Position Install Slider Repair Kit 1999 2001 Chevrolet Tracker with Automatic Transmission before specified breakpoint SUSPENSION 01 03 07 001 Revised Wheel Alignment Specifications Rear Camber Adjustment AWD and Rear Toe Adjustment 2002 Buick Rendezvous Chevrolet Venture Oldsmobile Silhouette Pontiac Montana 2001 02 Pontiac Aztek 01 03 08 003 Squawk Noise from Front and or Rear Suspension Lubricate Stabilizer Bushings 1997 2002 Chevrolet Malibu 1997 99 Oldsmobile Cutlass 1999 2002 Oldsmobile Alero Pontiac Grand Am 01 03 10 007 Information on Lowering Spare Tires Stored Unde
18. large amount of torque passing through the transmission loads the gears and may produce noise This is particularly true of 1st and 2nd gears Also during part throttle and coast engine noise Is reduced allowing transmission noise to be heard more easily Reverse to Park clunk is a result of the movement of the parking pawl and is more pronounced when parked on a hill Using the parking brake can minimize this noise Click in Park is a result of solenoids being energized and moving hydraulic valves in preparation for gear engagement A positive or firm shift feel is noticeable particularly in the 2 1 and 4 5 shifts The Allison shift stragegy programming provides firm shifts to prevent clutch pack damage due to slipping Training Available If these facts interest you there s a lot more available where they came from The GM Service Technical College offers several excellent training courses TIP See the September 2001 TechLink for information on using the Training Management System on the internet at http gmcommontraining com You must successfully complete the existing two part Allison LCT 1000 Transmission GM Service Know How video kit 17340 10V and 17340 11V before participating in the new training components These kits were sent out to dealers in May 2001 The Allison LCT 1000 Automatic Transmission Diagnostic Issues and Procedures 17340 12D is a 40 minute video that can be seen on the general viewing
19. lluminated at a time If all three are illuminated at the same time a wheel alignment is needed TIP When the transmission is in neutral for 4 seconds the system will default to 2 wheel steer until the shifter is placed into gear again This is to accommodate automatic car wash requirements and is normal Park Brake Specification Affected vehicles Service Follow this path in SI 2000 2002 GMC Sierra Steering Rear Wheel Steering See SI 2000 for details Here are some of the highlights Lifting Because of the tie rod boots on the rear rack and pinion gear It s important to use caution when lifting with an in ground hoist or using jack stands See SI 2000 for details Alignment There are provisions for toe adjustment only Caster and camber are fixed SI 2000 explains the detailed procedure for using the Tech 2 during the learn procedure Quarter Shafts The quarter shafts are equipped with constant velocity CV joints at the outer ends only The CV joints are protected with rubber boots similar to those on front drive axles Rear Actuator In normal operation noise from the actuator should not be audible when the actuator is commanded by the Tech 2 some operating noise is normal Steering Gear Motor The electric motor is serviceable separate from the steering gear When the motor is removed the planetary gear reduction set is exposed so care must be taken to avoid contamina
20. nal select TIS 2000 4 Click Snapshot icon 5 Download freeze frame failure record from Tech 2 to terminal OD Now you can review save and print the file Thanks to Keith Armitage and Mark Stesney TP OF THE MONTH PCM 016 BCM 064 SDM 088 TCS 040 EBCM 041 IPC 096 Radio 128 HVAC 153 RFA 176 TIP Although these IDs are standardized there may be variations depending on model When a U code sets keep in mind that the controller setting the U code is pointing to the controller causing the problem The ID number given in the U code tells you which controller is at fault The Tech 2 or S12000 can tell you which controller the ID number represents but before long it will become second nature Thanks to Mark Harris GM TechLink is a monthly magazine for all GM retail technicians and service consultants providing timely information to help increase knowledge about GM products and improve the performance of the service department This magazine is a companion to the GM Edge publication Publisher amp Editor Mark Stesney GM Service Operations lt Mark Stesney GM com Technical Editor Jim Horner lt J Jim Horner SandyCorp com 1 248 816 3641 Production Manager Marie Meredith Desktop Publishing Greg Szpaichler MediaWurks lt spake mediawurks com FAX number 1 248 649 5465 Write to gt lt TechLink PO Box 500 Troy MI 48007 0500 GM TechLink on the Web http service
21. nector 205 Thanks to John Woodrich Ignition Key Binds On some 1999 2001 Chevrolet Trackers with automatic transmission owners may comment that the ignition key binds in the accessory position and cannot be removed from the lock When the transmision shifter is moved to the Park position the BTSI cable moves the white plastic cam out of the way for the key release slilder to move forward as the key is moved into the lock position As the key reaches the accessory position instead of sliding smoothly the slider tends to tip in Its window slot As a temporary fix spray graphite lubricant on the sides of the slider and inside the lock behind the slider This will allow it to slide freely until a replacement lock set can be ordered and installed TIP The new ignition lock is part of a replacement vehicle lock set Revised locks went into production in December 2000 beginning with VIN 2CNBJ634616929850 On the new design the slider tab is black while on the older design It Is silver Thanks to Donald B Sherman Aztek Rendezvous AWD Rear Drive Axle Fluid Requirement Changed The Owners Manuals for these vehicles page 7 9 scheduled maintenance should be revised to eliminate the reference to servicing the drive axle by changing fluid at 12500 km 7500 miles if used to pull a trailer There is no need to change fluid if the unit is used to tow a trailer The Rear Drive Axle does not need to be serviced
22. need to use the J 35616 200 in conventional fashion you can plug the Supplied pointy probe onto the tool handle and the alligator clamp onto the test lead 7 Additional J 35616 200 tool sets can be purchased from Kent Moore for 39 95 by calling 1 800 GM TOOLS The probe is extra slender so it won t damage most terminals if they are carefully probed As with the previous J 34142 B test lamp which the J 35616 200 replaces the 250 milliamp filament is friendly to control modules providing a load that s just right for testing the circuits specified in SI 2000 TIP Each time you use your test lamp it s a good idea to do a bulb check Look for the essential J 35616 200 test lamp to be shipped by the end of the year And the new test lamp kit is also being packaged with the complete assortment of terminals and test leads from the Connector Test Adapter kit under the number J 35616 B Thanks to Paul Gallo and Dave Roland Return to page 1 November 2001 This review of service bulletins released through mid November lists the bulletin number superseded bulletin number if applicable subject and models GENERAL INFORMATION 01 00 89 013 Correct Use of Labor Operation R4490 RKE Transmitter Replace 2002 and Prior Passenger Cars and LD Trucks 01 00 89 014 replaces 72 05 01B Chevrolet Camaro and RS Pontiac Firebird Firehawk and GT Warranty Administration Process 1996 2002 Camaro SS and F
23. r Vehicle 2002 and Prior LD Trucks with Spare Tire Stored Under Vehicle DRIVELINE AXLE 01 04 1 7 004 Clunk Bump or Squawk when Vehicle Comes to Complete Stop or Accelerating from Complete Stop Replace Rear Drive Shaft Nickel Plated Slip Yoke 1999 2002 Chevrolet and GMC Extended Cab Short Box Pickup Models with 4L60 E RPO M30 or 4L80 E RPO MT1 Automatic Transmission and Automatic 4WD RPO NP8 01 04 20 004 Revised Drive Pinion Flange Yoke and or Oil Seal Replacement Procedure 2001 Chevrolet Camaro Pontiac Firebird Chevrolet and GMC M L Vans S T Pickup Models S T Utility Models Oldsmobile Bravada BRAKES 01 05 23 010 Noise Rattle From Rear of Vehicle While Driving Replace Rear Backing Plate Bolts 2001 2002 Chevrolet Camaro Pontiac Firebird prior to specified breakpoint ENGINE PROPULSION SYSTEM 00 06 01 025A replaces 00 06 01 025 Correct Oil Viscosity and Oil Filter Usage for the Duramax 6600 Diesel Engine RPO LB7 2002 02 Chevrolet Silverado and GMC Sierra 2500 HD and 3500 Models with 6 6L Engine VIN 1 RPO LB7 00 06 04 011A replaces 00 06 04 01 1 Evaporative Emissions DTC P0440 P0441 P0442 P0446 1996 2002 Passenger Cars and Trucks with Enhanced Evap Emissions except 1998 99 Prizm 01 06 01 023 Higher Than Expected Oil Consumption Replace Rings 1999 2001 Chevrolet Camaro Corvette Pontiac Firebird with 5 7L Engine VINs G S RPOs LS1 LS6 01 06 04 037A replaces 01 0
24. res to become lodged between the backside of the front wheel strut supports and the inner fender sheet metal Once lodged they begin to creak or create a popping noise as the body flexes To correct this condition create a path for the stones to fall out Form the path by pulling on the lower edge of the inner fender Move the inner fender toward the engine in line with the left or right engine mount area As this is done you may notice trapped stones begin to fall out from behind the inner fender Enlarge the exit path enough so that additional stones thrown up from the tires Tracker Inner Fender will have a clear exit path For more information see bulletin 01 08 63 004 Thanks to Donald B Sherman Pocket in Tracker Strut Tower Cruise Control Switch Backlight Inoperative some 2002 Oldsmobile Intrigue GX models may have a steering column mounted cruise control switch with inoperative backlighting A ground wire was deleted from the IP harness at start of production on 2002 GX models only This condition was corrected in production at VIN 2F102114 To correct the condition fabricate a jumper from a 48 cm 19 inch long 20AWG black wire lead with a M8 ring terminal on one end and a 12059894 Metripack 150 male terminal on the other end Attach the ring terminal to the ground stud on the mag beam on the right side of the steering column Insert the male terminal of the jumper into cavity F of the 8 pin con
25. tand the U codes that will periodically set For example if a U1096 was set in the PCM the PCM lost communication with the controller whose ID number is 096 In this case the Instrument Panel Cluster Looking at the service manual description for a U1096 it states that it is a Loss of Communications from Instrument Panel Here s a list of the more common controller and their IDs Destination Card Too Small Press ENTER to continue actually press the EXIT key Be sure you have 32 MB cards in both slots then start again FREEZE FRAME In events that cause a vehicle s emission system to malfunction governmental OBD II requirements call for a freeze frame failure to be recorded in the PCM Data parameters are caught at the time of failure and stored as a freeze frame The freeze frame remains until you erase it or it is overwritten by another event When you capture a freeze frame failure record you can download it to TIS 2000 and can view it The data on PC screen appears in the same order as data on Tech 2 You can store the freeze frame on your PC and can print it out for attachment to the repair order for future reference Here s the path TIP Make sure you have the most current update loaded to your PC There have been some improvements made to this feature including increasing snapshot storage from 10 to 50 files 1 Connect Tech 2 to Techline terminal 2 Power up Tech 2 3 On Techline termi
26. tion Tech 2 Functions You can use your Tech 2 to read operating parameters Also you can command various functions so you can observe operation These include mode indicator lamps as well as steering in right and left directions See SI 2000 for details Thanks to Jerold Miller 1997 2001 4X4 T Chevrolet Blazer S 10 GMC Envoy Jimmy Sonoma Oldsmobile Bravada After resurfacing a park brake drum on the rear rotor of the above vehicles the maximum drum diameter should not exceed 191 mm 7 52 in Thanks to Dan Oden Return to page 1 Display screen tilted open for access to DVD player F For 2002 the Cadillac DeVille and Seville will offer a new DVD Navigation System Although there are a lot of important new features perhaps the one the owner will notice first is that it requires only one map data disc to cover the entire continental US No more having to carry a selection of discs and having to change them at state borders This is possible because a DVD has a considerably larger storage capacity than the previously used CDs The disc is loaded directly into the instrument panel unit instead of a trunk mounted unit as in 2001 As before the new navigation system uses a Global Positioning System GPS receiver to determine the car s location Then using data from the DVD it displays a map of that location TIP See the May 2001 issue of TechLink for a description of the GPS principle wh
27. to do with the 10 MB card These ideas and comments are being reviewed and you will be notified as soon as a decision is made MAKING A DUPLICATE CARD Once you have updated a card you can use this timesaver copycard procedure to make duplicates One card the source has the programming you want to copy onto the other the destination You can can put either card in either slot TIP Be sure the cards are seated properly Improper seating will cause error messages to appear Also use caution and make certain that the card is properly aligned with the guides in the Tech 2 card ports Failure to properly align the card may damage the card or the Tech 2 Follow this Tech 2 path 1 Power up the Tech 2 to the log on screen Use the shift key and the right or left arrow key to select the source card the size of the card and version number will be displayed on the screen 3 Press ENTER 4 F3 Tool Options Main Menu F7 Make Duplicate PCMCIA Card Tool Options NO Ol The screen will confirm the direction the data will flow Press the COPY soft key to begin the copy function OD TIP You cannot copy from a 32 MB to a 10 MB card If you try to do so this message will appear Every controller on the Class 2 bus has its own unique identification ID number For instance the PCM s ID number is 016 and the Instrument Panel s ID is 096 Understanding this concept makes it easier to unders
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