May 2001 Volume 3, No. 5

OnStar Service Issues Techline News

SI 2000 Now Updated Weekly Beginning the first week in April, the SI 2000 website is being updated once a week. The latest inform a t i o n will be available each Friday morn i n g . This is twice as often as before .

To access the information, use your internet browser to go to web- site http://service.gm.com. Do not use “www” in this addre s s . Click on Service Manuals, Bulletins and Campaigns. You will need to type your User Name and P a s s w o rd to go past this point. Most systems on GM vehicles are Next, on the SI 2000 Home Page, integrated completely into the vehicle. select the area you’re interested in. They carry out their intended functions By the way, notice that you now without reacting to influences from out- have a choice of two languages: side the vehicle. Contents English and Fre n c h . A few systems, though, can be The information that is updated affected by the behavior of something OnStar Service Issues ...... 1 each week includes Service Manual, outside the vehicle. For instance, the SI 2000 Now Updated Weekly ...... 1 Bulletins, Campaigns, and Pre l i m i n a ry radio depends on receiving an acceptable I n f o rmation (PI) titles. signal from the radio station’s tower. Dealership PC Network Strategies ...... 4 By clicking on Latest News, you Radio reception can be affected by exter- will see a list of Bulletins, Campaigns nal interference from overhead electrical Dinghy Towing -- A Reminder ...... 5 and PI titles that have been re c e n t l y wires, faulty ignition in nearby vehicles, added. A box at the end of the page and driving past tall buildings or through Recognizing OE Batteries ...... 5 allows you to select 2, 4, 6 or 8 tunnels. weeks. Service manual revisions and New Mid-Size Truck Rear Suspension System . . . .6 additions are not indexed. Similarly, the proper operation of the OnStar system is affected both by in- Malibu Exhaust Rattle ...... 7 The internet will always be your vehicle components and by influences f reshest source of service inform a- coming from outside the vehicle. The Armrest Lowers Itself During Braking ...... 7 tion. The service information on GM OnStar system has several independent ACCESS will continue to be updated GM Service Clubs, Part 4 ...... 7 on a two week cycle. And it’s even elements that must work together in order for the system to function properly. possible that new bulletins may TAC Tips ...... 8 appear on SI 2000 before the paper The hardware in the vehicle. The copies arrive in your dealership. Vehicle Interface Unit and Vehicle Bulletins ...... 8 – Thanks to Lisa Scott Communications Unit, the cellular anten- na, the GPS antenna, and related cables Service Operations must operate properly and must interface continued on page 2 1 correctly with the vehicle. The Cellular Phone System GM TechLink is a monthly magazine The cellular phone network. The Issues for all GM retail technicians and ser- cellular network must be able to deliver a There are numerous issues that arise vice consultants providing timely two-way cellular call. information to help increase knowl- from utilizing a cellular system supplied edge about GM products and improve The OnStar Call Center by an independent third party. Cellular the performance of the service Application. This application must be towers can be busy, depending on the department. This magazine is a com- able to send and receive information level of traffic on the system. Some panion to the GM Edge publication. from the vehicle. areas of the country may have a limited or inadequate number of cellular towers Signals from US GPS satellites. The Publisher & Editor: to handle the load of cellular phone calls. OnStar equipment in the vehicle must Mark Stesney also be able to receive and interpret sig- GM Service Operations nals from the US Global Positioning [email protected] Satellites orbiting above the earth.

Technical Editor: The OnStar system relies upon all of these independent systems to work Jim Horner together to provide service to OnStar [email protected] subscribers. It is precisely this interaction 1-248-816-3641 that makes the OnStar system unique.

Production Manager: But this interaction of internal and external factors can complicate the prop- Marie Meredith er diagnosis of customer concerns. Desktop Publishing: The diagnosis of the in-vehicle hard- Greg Szpaichler, MediaWurks ware is not significantly different from [email protected] diagnosing other on-vehicle modules. The real difficulty in diagnosing the OnStar Cellular Phone System FAX number:  system lies in assessing whether the 1-248-649-5465 customer’s concern is the result of a problem in the vehicle hardware or an OnStar has made an arrangement Write to:  with Verizon to provide cellular service issue with the other external systems for the OnStar system. To provide OnStar TechLink necessary for OnStar operation. PO Box 500 with truly national coverage, Verizon has Troy, MI 48007-0500 On-Vehicle Equipment Issues signed agreements with local carriers in areas where Verizon doesn’t have a GM TechLink on the Web:  Many on-vehicle equipment issues license. http://service.gm.com can be resolved by simply ensuring that the system components are installed or In order for a cellular call to be deliv- connected properly. The cellular antenna ered between OnStar and a vehicle, service tips are Verizon must ensure that every local car- intended for use by professional tech- mast must be installed on the vehicle rier in the chain handling the call must nicians, not a "do-it-yourselfer." They and the coax cable must be tightly con- recognize the phone number assigned to are written to inform those techni- nected to the Vehicle Communication cians of conditions that may occur on Unit (VCU) and the antenna base. each vehicle. some vehicles, or to provide informa- Long distance is yet another aspect. tion that could assist in the proper At present, OnStar has two call centers, service of a vehicle. Properly trained one in Charlotte, NC and one in Troy, MI. technicians have the equipment, tools, Unless a vehicle is located in one of safety instructions and know-how to these two cities, it is likely that the vehi- do a job properly and safely. If a con- cle will at some point have to make a dition is described, do not assume long distance call. This involves a long that the bulletin applies to your vehi- cle or that your vehicle will have that distance carrier and adds to the complex- condition. See a General Motors deal- Vehicle Communication Unit (VCU) ity. and the Vehicle Interface Unit (VIU) er servicing your brand of General While this sounds very complicated, it Motors vehicle for information on is usually seamless. The vast majority of whether your vehicle may benefit from OnStar calls are successful. The ones the information. The GPS antenna must have a good connection both at the antenna and at that may require service are typically the Inclusion in this publication is not nec- the Vehicle Interface Unit (VIU). The GPS exceptions, not the norm. essarily an endorsement of the indi- vidual or the company. antenna coax is rather fragile cable. When inspecting or replacing the cable, GPS System Issues Copyright© 2001 General Motors Corporation do not bend it to a curve less than 2 inch- The Global Positioning System (GPS) All rights reserved. es in diameter or the cable will be dam- is an example an everyday civilian benefit aged. resulting from a system originally devel-

2 Other New Refinements - Progression tones replace the tradi- tional audio feedback of a ringing phone, busy signal or other similar oped for the military. the voice recognition software incorporat- message. The tone is an audio note ed in the vehicle hardware. If there’s a There is a mathematical principle that repeats at regular 5 to 15 sec- problem with this part of the system, it’s called triangulation that says you can pin- ond intervals. right there in the vehicle. Then, there’s point an unknown location if you know its the voice recognition software at the When the OnStar Call Button or the distance from three known locations. other end of the call within the Virtual emergency key is pressed, you will hear GPS uses 24 NAVSTAR satellites orbiting “connecting to OnStar,” followed by the Advisor System. This part of the system the earth. The location of each satellite is progression tones. With normal cellular can be affected by interferences on the known at any given time. The satellites connection times, the tones could last as cellular communication network. constantly broadcast radio signals. A GPS long as three minutes before a connec- receiver compares the amount of time it Most voices are readily recognized, tion is made. takes for the signals from at least three but some users may experience difficulty It is important to wait until the sys- different satellites to reach the receiver. with certain numbers, words, or phrases. tem makes a connection, or the “unable By translating time into distance, it can The customer may have to be trained to connect to OnStar” message is heard. calculate the receiver’s location on earth. to modify their speech pattern slightly to OnStar recommends that you try to con- The OnStar receiver in the vehicle take full advantage of the voice recogni- nect several times. If a successful con- receives the GPS data, decodes it, and tion system. There are some tips for nection cannot be made, you will need to transmits the vehicle’s location by cell using voice recognition on the MyOnStar contact the OnStar call center to request phone to the OnStar call center. website, in SI 2000, and in the OnStar verification that the OnStar system in the owners manual. vehicle is registered with the national cel- lular network. If the system can recognize at least In rare instances, it is possible that one word, the hardware is functioning the message “OnStar request ended” properly. Do not replace it. could be heard. This indicates that the The system may have difficulty recog- cellular connection was interrupted nizing commands when multiple people before completing a connection to are talking or there’s excessive road OnStar. In these instances wait for a noise. short period of time and attempt to con- nect again. SI 2000 has a voice recognition diag- nostic along with some tips for proper - The F1 module adds the capability of intonation and other adjustments. setting a code for a disconnected GPS antenna. Follow this path: - While the VCIM combines the func- GPS System - Body and Accessories tionality of the VIU and the VCU into - Cellular Communication one package, the system will still set internal communication codes. This GPS technology may be affected by - Description and Operation would drive the replacement of the external factors. Many of these are simi- - OnStar Description and Operation unit. lar to the things that affect conventional - The replacement of the VCIM will - General Tips for Better Speech radio or TV reception. require the Station ID (STID) and Recognition - There must be a direct line of sight Electronic Serial Number (ESN) be between the receiver antenna and and communicated to the call center. the satellites. - Personal Calling Commands Top OnStar Issues - Signals may be obstructed by terrain Some of the conditions explained by or buildings, preventing reception by Any time an OnStar VIU is replaced, SI 2000 include noise from open win- reconfiguration is necessary. Press the the receiver. dows or sunroof, speaking too soon after blue button and tell the advisor you are a - Multipath error, caused by signals a prompt, a high pitched voice, and technician who has just replaced a VIU being reflected from objects before emphasis on certain sounds. and you need to update the customer’s reaching the antenna, affects the account. You will need the STID number system’s accuracy. New Product Features from the replacement part when you call. Several of the new 2002 vehicles, When replacing an OnStar VCU, you Voice Recognition Issues starting with the 2002 S/T utilities will also need to contact the OnStar call center to perform a reconfiguration. You The majority of 2001 vehicles are (Bravada, Envoy and TrailBlazer), have the latest iteration of OnStar hardware, des- will need to have the module’s ESN avail- capable of offering two services called able when you call. OnStar Personal Calling and OnStar ignated as F1. The predominant feature is Virtual Advisor. These services use a that it combines the VIU and the VCU Refer to the VIU or VCU replacement voice recognition system. into one package, called the Vehicle procedure or the OnStar reconfiguration Communications and Interface Module procedure in SI 2000. There are two distinct voice recogni- (VCIM). – Thanks to Dale Tripp, Mike Batchik, tion systems at work here. First, there’s Dean Tobias, and Dave Mitchel

3 gramming data) on a regular basis. In Dealership PC shops with electronic repair orders, they need nearly constant access to the RO HOW SERVICE Network files, both to determine what work is INFORMATION GETS TO needed and to record services performed YOUR DEALERSHIP Strategies and parts used. The recommended guideline is one GM ACCESS PC per 2 or 3 technicians. Because each A satellite-based intranet pro- service department is unique, this guide- viding two-way communication line should be a consideration when eval- between GM and the dealership. uating overall productivity. Of the many aspects of dealership The SI 2000 and TIS software are operation communicated over GM flexible enough to run on relatively com- ACCESS, several are directed at mon business-grade systems. the service department. Specifications are available from GM - Incremental updates of SI 2000 Service Operations at website http://service.gm.com/techlineinfo/. - Updates of TIS 2000 TWO MAIN STRATEGIES SI 2000 There are two main strategies for dis- This is the electronic version of Typical GM ACCESS Configuration tributing information to the technicians’ the service manual, service and individual PCs. campaign bulletins, and Product As the automobile enters its second Information titles. It is available on century, it’s pretty obvious that comput- - download all of the data from the internet (weekly updates), and ers are playing an ever-increasing role, Techline CDs to each individual PC can be downloaded from Techline both in the operation of the vehicle and in - download all of the Techline data to CDs or from GM ACCESS (bi- the service department. a central server, with individual PCs net- weekly updates). It’s no longer possible to get along worked to the server The http://service.gm.com with just one PC in your service depart- In the second scenario, the network, website is the internet portal to SI ment. Service information comes into it’s also possible to connect the server to 2000, as well as numerous other your dealership from a number of an internet service provider, which then service related resources, includ- sources, using a variety of media. And links each individual PC to the internet. ing this TechLink magazine. once the information is in the dealership, it needs to be distributed and made To further expand the network con- accessible to a number of users. cept, it may be possible to use your TIS 2000 Dealer Service Provider (DSP) hardware The Techline Information DEVELOPING A to access SI 2000 data, either by individ- Systems 2000 consists of service DEALERSHIP STRATEGY ual downloads or through a network. This programming software needed to means that each PC can do multiple duty. update vehicle programming, using The question, then, is how to develop the Tech 2. Bi-weekly updates of a logical strategy that works for your spe- TIS can be downloaded from GM cific dealership. A well-thought out strate- ACCESS and from the GMSO gy helps determine what hardware is website. needed, as well as how to interconnect it for maximum flexibility and convenience. With good planning, it is be possible to improve the efficiency of your GM the update CDs to arrive. ACCESS and PC network without having to add a lot of new equipment. A quali- - In dealerships where SI 2000 is on a fied system administrator should review central server, the system administrator and refine the strategy before anything is can download updates weekly from the purchased or installed. internet. Again, there’s no need to wait for updates on CD or from GM ACCESS. At the recent 2001 National Auto Dealer Association (NADA) convention, - The direct-to-internet system is ideal GM Service Operations made for service departments that are not con- Networking Strategy the theme. GMSO GM ACCESS with Internet and nected to GM ACCESS at all. Cases like talked to many dealers, and focused on DSP Connections these are usually where the service or how to provide the service department body shop is in a remote location or with enhanced alternatives to the stan- WHAT’S BEST? building, away from the GM ACCESS system. dard GM ACCESS network. This informa- There is no single fits-all answer. But tion is available on the internet at the fol- there are some points to consider. - GMSO does not recommend a lowing address: modem dialup connection to the internet, - Dealerships are encouraged to pro- because this is the lowest level of perfor- http://service.gm.com/techlineinfo/ vide technicians with a high-speed mance. Some of the configurations that multiplepc.html access to SI 2000 directly from the inter- provide a continuous Broadband connec- net. A major benefit is that the data is Here are some highlights from this tion are ISDN, DSL and T-1 lines. updated automatically, every week. document. Availability and cost vary with location. There’s no need to manually download Technicians need ready access to SI updates from GM ACCESS or wait for – Thanks to Mike Wa s z c z e n k o 2000 (service information) and TIS (pro-

4 Towing News

removed. For these trucks, the preferred propeller shaft must be removed and the Dinghy Towing -- towing method requires use of a platform steering column unlocked. trailer which lifts all four wheels from the IMPORTANT: Refer to the service man- A Reminder pavement. ual for propeller shaft removal and installa- The latest information on dinghy towing IMPORTANT: Refer to the service man- tion. Provisions must be made to keep the is found in Bulletin 00-00-89-008A, dated ual for propeller shaft removal and installa- lubricant in the transmission and dirt out. April, 2001. Dinghy towing refers to towing tion. Provisions must be made to keep the After towing, verify that the transmission a vehicle with all four wheels on the lubricant in the transmission and dirt out. fluid is at the proper level before driving the ground, for instance behind a motor home. After towing, verify that the transmission truck. Your customers may have questions fluid is at the proper level before driving the - Thanks to Mike Ondre about which vehicles can be towed this truck. way, and how to do it correctly. Refer them to the Owner’s Manual for guidance. For those vehicles that can be Details are also included in the bulletin dinghy-towed, follow this pro c e d u re . mentioned above. Be sure to read the bul- - Set the parking brake. letin completely and follow the procedures Recognizing Original exactly, to avoid damage to the vehicle - Place the in Equipment Batteries being towed. These are the highlights. PARK, or the manual transmission in first gear. If you have the need to distinguish between an original equipment (OE) Passenger Cars - After hooking the vehicle to the towing AC Delco battery and an IMPORTANT:: Cars must not be towed vehicle, shift the transfer case to a f t e rm a r k e t / s e rvice AC Delco battery, h e re ’s how. backward or the transmission may be dam- Neutral. Be aware that the vehicle can aged. roll, even if the transmission is in Park The OE AC Delco battery has only or in gear. one label on top, and it is pre d o m i n a n t- The bulletin spells out exactly which ly black and silver. vehicles may be towed. Generally, they are - Release the parking brake. The afterm a r k e t / s e rvice AC Delco those with front wheel drive and either the - The steering column must be b a t t e ry has two labels, and they are automatic transaxle 4T40-E or 4T45-E, or p redominantly blue and white. the 5-speed manual transaxle MK7, MJ1, unlocked. The Owner’s Manual speci- M86, or M94. fies the appropriate ignition key posi- Also the afterm a r k e t / s e rvice AC tion to ensure that the steering is Delco battery is generally re f e rred to as IMPORTANT:: Manual Transmissions unlocked to allow the front wheels to a Professional series battery, while the M58, M42, and MM5 should not be towed follow the tow vehicle. OE AC Delco battery is not. There may with all four wheels on the ground. be some non-Delphi manufactured bat- teries in the AC Delco afterm a r k e t / s e r- - First, set the parking brake. Mid/Full Size Trucks with vice line which are not re f e rred to as P ro f e s s i o n a l . - Because the ignition key must be Rear Wheel Drive turned from the LOCK position, it’s These vehicles should not be dinghy- necessary to pull the fuse(s) indicated towed. The preferred towing method in the Owner’s Manual. This prevents requires use of a platform trailer which lifts the instrument panel or electronic all four wheels from the pavement. If tow- PRNDL from draining the battery. ing on all four wheels is unavoidable, the - After hooking the vehicle to the towing vehicle, the steering column must be unlocked. The Owner’s Manual speci- Summary fies the appropriate ignition key posi- tion to ensure that the steering is Vehicle To w unlocked to allow the front wheels to M e t ro/Prizm No AC Delco Original Equipment Battery follow the tow vehicle, and to ensure Label that the transmission shifter is C a v a l i e r / S u n f i re / M a l i b u /Ye s unlocked, without starting the engine. A l e ro/GrandAM

- Shift the transmission to Neutral. Then All other cars, auto. trans. N o release the parking brake. - Do not exceed 65 mph while dinghy- Tracker Refer to towing. o w n e r ’s manual for Mid/Full Size Trucks with d e t a i l s 4-Wheel or All-Wheel Drive C o rvette, Camaro, Fire b i rd N o Certain T and K trucks may be dinghy- towed with the transfer case shifted to 4 Wheel Drives (T/Case) Yes, If Neutral. These are listed in the Bulletin. T/Case has The remaining T and K trucks with 4- netural wheel- or all-wheel-drive can be dinghy- towed only with the propeller shafts Rear Wheel Drive N o AC Delco Aftermarket/Service Battery Labels

5 coil springs. Otherwise, the 5-link sus- adding, subtracting, or maintaining air New Mid-Size Truck pension is the same. in each of the inflatable springs. A sen- sor on each upper control arm deter- Rear Suspension The ECAS system consists of three mines when a change is needed. The main groups of components: System air compressor assembly, located on “It rides like it was on air.” Proud - an air compressor and module the right rear chassis rail, handles the owners have applied that fanciful claim - air suspension sensors task of moving air into or out of the air to lots of cars and trucks over the springs as needed. years, but rarely can you take it literally. - air springs Incidentally, the compressor also Now you can. A new, sophisticated The air springs operate at a pres- serves as an accessory inflator, similar electronically controlled air suspension sure of 45 - 103 psi, with a maximum to other GM products. Simply attach a (ECAS) is either standard or available hose to the air fitting and press the control button located in the right rear trim panel. Compressor Operation The compressor can inflate or exhaust the air springs with the ignition key in the ON position. The accessory inflator feature can be turned on by depressing the inflator button, with the ignition on or off. Upper and lower control arms The compressor can exhaust up to static pressure of 175 psi. The top and 30 minutes after the key is turned off. bottom pistons are made of nylon, and The duty cycle allows the compres- the air bellows are made of rubber. The sor to run only a certain amount of air springs operate over a temperature time. The compressor will not inflate or range of -32°C to 80°C (-26°F to exhaust during the time-out mode. on the new 2002 Bravada 176°F); short term exposure, 2 hours and GMC Envoy sport utility models. or less -40°C to 90°C (-40°F to 194°F). System operating pressure is The expected service life is 10 years or between 20 to 105 psi. The leakage 5-Link Rear Suspension 150,000 miles. specification of the complete system (compressor and air springs) allows a Regardless of the load being car- Before we get to the specifics of vehicle-drop of less than 1.5 mm/24 ried, the inflatable ECAS air springs ECAS, we need to take a short look at hour. the all-new 5-link rear suspension that provide several benefits that coil backs it up. This suspension system is springs cannot: Service Procedures Unique designed to enhance load-carrying - keeping the vehicle visually level capability while providing a comfortable to ECAS ride. - providing optimal headlamp aiming SI 2000 contains comprehensive service procedures for the ECAS sys- In the base configuration, rear coil - maintaining optimal ride height tem. Follow this path: springs are used for the first time in - provide optimum ride comfort at these vehicles. The elimination of leaf different loading conditions - Identify the 2002 vehicle springs permitted the engineers to - Suspension divide the rear suspension’s two tasks - provide good noise isolation between two sets of components. The These tasks require the air springs - Air Suspension coil springs take on only the ride and to adjust their height automatically; You will then have a choice of load carrying functions. Location of the each side is managed independently by Operation, Diagnostics, Repair, rear axle is now assigned to five sepa- the ECAS module. This is done by Specifications, Schematics and rate links, or control arms. Component Locator sections. On each side, the axle’s up and down movement is controlled by a pair Diagnosis of longitudinal upper and lower control IMPORTANT: Because this system arms, while side-to-side control is pro- does not communicate on the serial vided by a tie rod running behind and data (Class 2) bus, your Tech 2 cannot parallel to the axle. And, of course, be used to diagnose it. conventional shock absorbers are used at each side. The system uses a flashing LED in the inflator switch located in the right Electronically Controlled Air rear trim panel to communicate system faults. With the ignition on and the Suspension (ECAS) engine off, the LED will flash stored In the ECAS system, air springs codes related to the various system take the place of the standard metal Height sensor conditions. The codes flash similarly to

6 the old Check Engine light diagnostic Malibu Exhaust Rattle the cavity in place. Obtain a piece of high codes. Flashing pulses repeat at the density closed cell foam, such as 3M rate of 0.5 seconds, with a 3-second 06370 Scotch Foam Black Vinyl or equiva- delay between codes. lent. The tape should measure 1 inch wide x 8 inches long x 1/4 inch thick. Taper the After observing the codes, simply last inch of the foam tape to half its thick- perform the procedures associated ness to prevent a transition line from with each of the three Diagnostic showing on the outside of the armrest. Codes. DTC 001 is associated with internal component failures. DTC 002 indicates right height sen- sor faults. Some owners of 2001 Chevro l e t Malibus may comment on a rattle fro m And DTC 003 indicates left height under the car. This may be caused by sensor faults. i n s u fficient clearance between the Tapering the foam tape Diagnostic codes are cleared auto- exhaust pipe and the screw that secure s matically when the ignition switch has the fuel tank heat shield at the fro n t . Install the foam tape between the hard been cycled from off to on, and the T h e re should be a minumum of 15 mm ABS plastic cavity top edge and the foam clearance between the exhaust pipe and padding in the armrest, with the tapered cause for setting the code has been the head of the scre w. If the clearance corrected. end toward the rear. Make sure you keep is less than 15 mm, place a suitable tool the foam tape near the top surface of the on the head of the screw and push armrest. Restaple the material to the inside Depressurization u p w a rd until there is at least 15 mm of edge of the hard ABS plastic surface. Make Some repair procedures require clearance between the exhaust pipe and depressurizing the air suspension sys- the screw head. tem before proceeding. This is spelled – Thanks to Dave Dickey out in detail in SI 2000. Here are some highlights. Depressurize the system with the Armrest Lowers Itself axle fully supported and set between During Braking D-height and full jounce. Failure to fol- low these steps may cause damage to Owners of some 2000-2001 Pontiac Grand Prix may comment that the rear the air springs. armrest lowers itself during braking, on Foam tape installed vehicles equipped with leather seats. Remove the air suspension fuse sure to use the same length staples as before working on the rear suspension This condition is corrected by shimming were removed. to avoid affecting the calibration of the the outboard sides of the armrest. leveling sensor. Complete this process on both sides of Place the armrest in the down position. the armrest, then reinstall the cupholder in The compressor bolts must be Remove the cupholders by pushing rear- the armrest. Always road test the vehicle removed and the compressor support- ward on the front of each side of the to be sure you have corrected the condi- ed before the air supply line fittings cupholder and lifting up to disengage the tion. Usually one layer on each side cor- can be loosened to bleed pressure retainers. rects the condition, but if the armrest still from the springs. comes down, you may have to add a sec- Remove the staples located along the ond layer of foam. – Thanks to Dave Smith, Jeff Downing, outboard sides of the cupholder cavity, and Eric Kenar. leaving the staples at the front and rear of – Thanks to Fred Tebbets

number of GM sources. West Central Service Managers Club GM Service Clubs, Contact: Les Guderian Here is a list of additional GM ser- Part 4 vice clubs. GM supports local service Humboldt Motor Sales, Humboldt, IA 515.332.2764 This is the fourth and final article in clubs and many GM representatives a series. attend the club meetings. For more WESTERN REGION information about GM service clubs, GM service clubs around the coun- contact any of the clubs listed below. Los Angeles / Orange County Retail try meet to talk about the service Earlier lists appeared in November Service Managers Club (LOSOR) issues that dealership service depart- and December, 2000, and February Contact: Mike Bowers ments face each day. 2001. Peninsula Pontiac GMC Buick, Torrance, CA This interactive communication is 310.257.4200 one of the benefits for service man- NORTH CENTRAL REGION agers who attend a local service club Fox Valley GM Service Managers North Bay Service Managers Club meeting. The clubs provide a way for Association Contact: Roger Cunningham service managers to access a wide Contact: Ben Gawaresky McConnell , Healdsburg, CA array of information from other dealer- West Side Garage, Berlin, WI 707.433.3384 ship service departments as well as a 800.223.3302

7 This review of service bulletins 01-06-02-002; Whining Noise In 01-07-30-007; Release of New Torque released through mid-April lists the bul- Passenger Compartment When Engine Converter Bolt; 2001 Cadillac Escalade, letin number, superseded bulletin number RPM is 1700-2300 (Remove Coolant 1998-2001 Chevrolet Camaro, Pontiac (if applicable), subject and models. Flow Restrictor); 2001 Chevrolet and Firebird, 1999-2001 Chevrolet and GMC GMC C/K Models (Silverado, Sierra) with C/K (New Style) Pickup and Utility GENERAL INFORMATION: 8.1L Engine (VIN G -- RPO L18) Models 99-00-89-011A; replaces 99-00-89- 01-06-03-003; Generator Upper 01-07-30-010; Torque Converter 011; New Key Code Information for 10- Mounting Bolt Breakage (Replace Bolt Replacement; All 2001 and Prior GM Cut Keys; All 2000-2001 Passenger Cars and Install Brace Rod Assembly); 1996- Passenger Cars and Trucks with ALL and Trucks Except Cadillac Catera, 2000 Chevrolet and GMC C6-7 Automatic Transmissions and Transaxles Conventional Medium Duty Models with Eldorado, Chevrolet Camaro, Lumina, BODY AND ACCESSORIES: Metro, Prizm, Tracker, Pontiac Firebird, Gas Engine (VINs B, D, M, P -- RPOs Medium Duty Trucks L21, LP4, LR0, LS0) 99-08-44-001B; replaces 99-08-44- 01-06-04-010; Product Enhancements 001A; Video Entertainment System; 00-00-89-015A; Warranty 2000-2001 Chevrolet Venture, 1998-2001 Administration -- Repair Order (RO) to Improve Slow/No Start Conditions In Extreme Cold Weather; 1999-2000 , Pontiac Montana Documentation; 2001 and Prior with RPO U42 Passenger Cars and Trucks Chevrolet Tracker 00-08-61-001A; replaces 00-08-61- 01-00-89-006; February, 2001 Bulletin 01-06-04-011; Water in AIR Pump and/or DTC P0410, P0412, P0415, 001; Revised Assist Step Installation Summary; 2002 and Prior Passenger Cars Procedure; 2000-2001 Chevrolet and and Trucks P0416, P0100, P0101, P0102 or DTC 48 (AIR System Disable Procedure); 1995- GMC C/K 1-2 Utility Models (Suburban, HVAC: 1996 Buick Roadmaster, Cadillac Tahoe, Denali, Yukon, Yukon XL), 2002 Fleetwood, Chevrolet Caprice, Impala SS Cadillac Escalade 01-01-38-005; Insufficient Heat From with 4.3L or 5.7L Engine (VINs W, P -- 00-08-64-018B; replaces 00-08-64- Rear Heater During Extreme Cold RPOs L99, LT1) Weather (Replace Rear Heater Tee 018A; Rear Door Window Inoperative Couplings); 2000-2001 Chevrolet and 01-06-04-012; Malfunction Indicator (Replace Both Rear Door Window GMC C/K Utility Models (Suburban, Lamp ON with a DTC P0341, P0342, Motors); 2000-2001 Chevrolet and GMC Tahoe, Yukon, Yukon XL) Built Prior to P0343 (Replace Cam Sensor); 2001 C/K Utility and Crew Cab Pickup Models October, 2000 Chevrolet and GMC C/K and G Light Duty 01-08-44-002; Front Door Speaker Models, 2001 Chevrolet and GMC B7, 01-05-23-003; Revised Tool Rattle/Vibration (Reposition Window C6, C7 Medium Duty Models with 8.1 L Regulator Handle Plate [Escutcheon]); Requirements for Front and Rear Brake Engine (VINs E, G -- RPO L18) Caliper Overhaul; 1997-2001 Vehicles per 1999-2001 Chevrolet Tracker with Manual list 01-06-04-018; Intermittent Windows Malfunction Indicator Lamp (MIL) and STEERING: 01-08-51-001; Residue or Water PCM DTC P1404 (Recalibrate PCM); Marks on Paint After Removal of Transit 2001 Buick Century, Chevrolet Impala, 01-02-35-001; Steering Wheel Protection Coatings; 2001 Chevrolet Malibu, Monte Carlo, Venture, Camaro, Pontiac Firebird Squeaks When Turning (Install Insulating , Silhouette, Pontiac Material); 1999-2001 Chevrolet Camaro, Aztek, Grand Am, Grand Prix, Montana 01-08-63-002; Underhood Insulation Pontiac Firebird, built prior to Feb. 1, with 3.1L or 3.4L Engine (VINs J, E -- 2001 Flaps at Highway Speed (Replace Hood RPOs LG8, LA1) Pad); 2001 Aztek DRIVELINE AXLE: 01-06-05-002; Rattle, Buzz or Clunk 01-08-64-001A; replaces 01-08-64- 01-04-20-003; Rear Axle Exchange Noise from Vehicle Underside (Reposition 001; Front Floor Carpet Wet/Musty Odor Program; 2002 Chevrolet and GMC S/T Heat Shield in Front of Fuel Tank) 2001 (Replace Rear Door Water Deflector); Utility Models (TrailBlazer, Envoy), 2002 Chevrolet Malibu 2000-2001 Chevrolet and GMC C/K Utility Oldsmobile Bravada with 8.0 Inch Ring Models (Tahoe, Yukon, Yukon Denali) Gear Rear Axle TRANSMISSION/TRANSAXLE: 01-08-67-001; Replacement Keys for ENGINE/PROPULSION 01-07-29-001; Manual Transmission Roof Rack Cross Rails; 1999-2001 Comes Out of Gear (Install New Shift Chevrolet Tracker SYSTEM: Shaft Lever); 1999-2000 Chevrolet and 00-06-03-009A; replaces 00-06-03- GMC C/K, S/T Pickup Models with 01-08-85-001; Vehicle Stability 009; Lean Hesitation, Sag or Stumble NV3500 5SP Manual Transmission (RPOS Enhancement System (Stabilitrack®); When Coolant Temperature is Between - MG5, M50) 2002 Cadillac Escalade 6 and +20°C (Reprogram PCM); 2000 Chevrolet and GMC C/K Models (Silverado, Sierra, Suburban, Tahoe, Yukon, Yukon XL) with 4.8L, 5.3L or 6.0L V8 Engine (VINs V, T, U -- RPOs LR4, LM7, LQ4) with 4L60-E Automatic Transmission (RPO M30) High Mount Stop Lamp M O D E L S : 01-06-01-010; Polymer Service Pistons; 1996 - 2001 Vehicles per list Deleted 2000 Chevrolet Chassis Cab C3, K3 with 3.1L or 3.4L Engine (VINs J, M. E -- If vehicles listed here are ord e re d 2000 GMC Chassis Cab C3, K3 RPOs LG8, L82, LA1) with option TS9 - STOP, HIGH LEVEL - 2001 Chevrolet Chassis Cab C3, K3 01-06-01-011; replaces 76-60-04A; DELETE, the High Mount Stop Lamp is Information on Engine Oil Consumption omitted and a cover is installed in its 2001 GMC Chassis Cab C3, K3 Guidelines; all 1996-2001 Passenger Cars and Gasoline Powered Light Duty Trucks p l a c e . Under 8500 GVW – GM Technical Assistance

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