It`s a New Tech 2 Look
Contents
1. July 2000 Volume 2 No 7 Techline News Downloading SI 2000 Incremental Updates GM dealerships recently received the lat est set of Service Information 2000 SI 2000 CDs version 2000 07 It includes ser vice information on 35 new vehicle platforms By updating the personal computers PCs in the service department that run SI 2000 the latest service information will be available in the deal ership before many of those models hit the showroom floor For GM dealerships In the U S new ver sions of the SI 2000 CDs will be released to GM dealerships about six times during the year In between those CD releases SI 2000 service information will be updated via satellite broadcasts to GM deal erships GM ACCESS servers every two weeks on a Friday night Check every other Monday to see if your dealership has received new service information By providing dealer Ships with updated infor mation through satellite broadcasts dealerships will receive timely infor mation with fewer CDs to handle Instructions for up dating a PC with an SI 2000 incremental update are available under the SI 2000 Help menu Under the Help menu select Checking your version number to see the current version of SI 2000 running on the PC From here the current version is displayed along with the release date of the next avail able incremental update and a link to the instruc tions for updating th2. 2000 and Prior Passenger Cars and Trucks 00 06 02 004 Brown Colored Gel Like Substance on Radiator Cap and Upper Filler Neck Replace Radiator Cap and Clean Radiator Upper Filler Neck 1997 2000 Buick Century 1996 Chevrolet Lumina APV 1996 2000 Chevrolet Lumina Monte Carlo 1997 2000 Chevrolet Venture 2000 Chevrolet Impala 1996 97 Oldsmobile Cutlass Supreme 1996 2000 Oldsmobile Silhouette 1996 97 Pontiac Trans Sport 1996 2000 Pontiac Grand Prix 1998 2000 Pontiac Montana With 3 1L or 3 4L Engine VINs J M E X RPOs LG8 L82 LA1 LQ1 00 06 03 003 Supplements but does not replace 99 06 03 012 Battery Testing and Replacement 1997 2001 Passenger Cars and Trucks Except 2001 Chevrolet Corvette 00 06 04 007A Replaces 00 06 04 007 Increased Accelerator Pedal Effort Replace Throttle Body 1999 2000 Chevrolet and GMC C K Pickup Models Silverado and Sierra with 4 8L 5 3L or 6 0L V8 Engine VINs V T U RPOs LR4 LM7 LQ4 00 06 04 021 Proper Service of Quick Connect EVAP System Connectors 1985 2001 Passenger Cars and Trucks 00 06 05 002 Exhaust Boom at 1500 RPM Install Spacers to Exhaust Hanger 2000 Chevrolet Corvette Built from SOP through December 1999 TRANSMISSION TRANSAXLE 00 07 30 006 Replaces 87 71 63 Stalls Surges at Stop or When Shifted to Drive or Reverse Install Updated Calibration 1998 2000 Chevrolet and GMC C K Models and G Vans With Hydra M atic Fill out this questionnair
3. Open Hands on technician train ing may be coming closer to your dealership In addition to the six regional GM Training Centers there will be 17 new GM satellite training locations Opening soon at colleges and other locations around the country These new satellite loca tions will offer hands on train ing just as the regional train ing centers The satellite loca tions however will not be conducting body or endorse ment courses Several satel lite locations began holding training classes last month and more will open in the coming months The satellite locations were determined based on dealership density the num ber of technicians in the area and commuting distances Any questions relating to the Satellite training locations can be directed to the associated Regional Training Center or the GM STC Help Desk at 1 800 336 0886 Hands on course informa tion as it relates to date s and location s offerings can be found in the schedule and enrollment areas of the Training Management System TMS and in the monthly GM Common Training Program Guide and Schedule SOUTHEAST REGION Atlanta Training Center Alpharetta GA 770 888 1300 Satellite locations Seminole Community College Sanford FL Central Piedmont Community College Charlotte NC NORTHEAST REGION New York Training Center Tarrytown NY 914 631 4950 Satellite locations Allegheny Community College Pittsburgh PA Hudson
4. Valley Community College Troy NY Harrisburg Community College Harrisburg PA SOUTH CENTRAL REGION Dallas Training Center Garland TX 972 278 2196 Satellite locations Longview Community College Lees Summit MO San J acinto Community College Pasadena TX Delgado Community College New Orleans LA Ranken Community College St Louis MO Training Solutions Snap on Memphis TN NORTH CENTRAL REGION Chicago Training Center Hinsdale IL 630 323 6000 Satellite locations Dakota County Tech Rosemount MN Sinclair Community College Dayton OH Detroit Training Center Warren MI 810 576 3308 WESTERN REGION Los Angeles Training Center Burbank CA 818 558 1620 Satellite locations Portland Community College Portland OR Los Positas Livermore CA Glendale Community College Glendale AZ Weber State Ogden UT Training Solutions Snap on Wheat Ridge CO J ean Hart A View from Inside the Warranty Parts Center The community of Orion Michigan located about 25 miles north of Detroit is the home of the GM Warranty Parts Center WPC Regardless of where your dealer Ship is located if you re asked to return a part that was replaced under warranty this is where it ends up You probably have questions about the warranty parts retum process so TechLink recently visited the WPC to obtain some answers How can learn about the Corporate Parts Return
5. steering column must be unlocked The Owner s Manual specifies the appropriate ignition key position to ensure that the steering is unlocked to allow the front wheels to follow the tow vehicle Light Duty Trucks with Rear Wheel Drive These vehicles should not be dinghy towed The preferred tow ing method requires use of a plat form trailer which lifts all four wheels from the pavement If towing on all four wheels is unavoidable the propeller shaft must be removed and the steering column unlocked NOTE Refer to the service manual for propeller shaft removal and installation Provisions must be made to keep the lubri cant in the transmission and dirt out Return to page 1 Bulletins June 2000 This review of service bulletins released through mid une lists the bulletin number Superseded bulletin number if applicable Subject and models GENERAL INFORMATION 00 00 89 011 April 2000 Bulletin Summary 2001 and Prior Passenger Cars and Trucks 00 00 89 012 J une 2000 Labor Time Guide Updates 1996 2001 Passenger Cars and Trucks HVAC 00 01 38 005 A C Condenser Instability A C System Inoperative Inspect A C System and Install Washers or Replace Condenser 1997 2000 Chevrolet and GMC F Model T Series Tilt Cab Medium Duty Trucks With Air Conditioning RPO C60 STEERING 00 02 35 004 Steering or Front End Road Induced Vibration Install and Reinforce Revised Steering and Suspension Compo
6. 08 49 003 Rattle Squeak in Right Side of Instrument Panel or Right Front Door Trim Panel Scratched or Right Side End of Instrument Panel Contacting Door Trim Panel Remove Instrument Panel Assembly and Align Tie Bar 1995 2000 Chevrolet Cavalier and Pontiac Sunfire 00 08 63 003 Noise at Torsion Bar Location Cab Difficult to Open Torsion Bar Broken Inspect Replace Cab Pivot Torsion Bar 1997 98 Chevrolet and GMC F Model T Series Medium Duty Tilt Cab Trucks 00 08 110 002 Removing Adhesive Residue from Interior Door Trim Panels 2000 Chevrolet Impala Monte Carlo Would you like to see GM TechLink available on the Intemet A Yes B No If GM TechLink were available on the Intemet where would you most likely access it from A Dealership B Home C Both Would you like to see GM TechLink expanded to cover more service issues A Yes B No Return to page 1
7. CPR Program Refer to bulletin 99 00 89 019 effective October 1 1999 It pertains to all 2000 and prior passenger cars and trucks and provides instruction about parts reten tion preparing parts for shipping and administration How do know which parts to return Dealers are notified which parts to retum through the Dealer Communication System twice per week Once a part is requested the dealer has 28 days to retum the part A debit is processed if the part is not received within the time limit The retum request will list specific warranty claims for which parts are to be retumed You should retum only the parts asked for but do not include parts not requested Ship each individual request in a separate box do not batch multiple requests in a single box How should parts be retumed WPC has established a contract with UPS to handle retums Where possible use the container from the replacement part Drain fluids and wipe the part clean re properly protected paperwork according the the ulletin Y does GM ask for parts to be retumed to the WPC Analyzing retumed parts will assist in improving product quality reducing customer dissatisfaction and reducing warranty expense What happens to a part when it s received by the WPC When parts arrive at the WPC they are either inspected on site or shipped to a supplier for review Parts inspected at the WPC go through a structured review process A typical review meet
8. Programming was selected from the main screen it was necessary to build the vehicle in essence tell the Tech 2 the vehicle you re working on before requesting any infor mation from the vehicle After successfully request 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 maga zine is a companion to the GM Edge publication VSSM Communications Gracemary Allen Publisher amp Editor Mark Stesney GM Service Operations lt M ark Stesney GM com Mark Spencer lt Mark Spencer SandyCorp com 1 248 816 3647 J im Horner lt 3 im Horner SandyCorp com 1 248 816 3641 Production M anager Marie Meredith Greg Szpaichler MediaW urks lt i pake mediawurks com FAX number E 1 248 649 5465 TechLink PO Box 500 Troy MI 48007 0500 General Motors service tips are intend ed for use by professional technicians not a do it yourselfer They are written to inform those technicians of condi tions 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 co
9. S server They will stay on the server until the next version of SI 2000 CDs is released For example updates 2000 07 01 and the SI 2000 Web site contact your dealership s Regional representatives for the nec essary access information Lisa Scott M ike Waszczenko server as well as the perfor mance and speed of the PCs Since a PC cannot be used while being updated and high amounts of activity on the server slow the updating process it s recommended to TE pii beee i P Fa m a m a a i l Pe ce ees es ol ce ee F Oi mee cog g ees epe m G e F eed Awailable Upedatas ee ee FHDIN EI i i iy cea T I The expected broadcast date of the next update can be found under the Help menu Return to page 1 Cooling System Conditions on Vehicles Equipped with DEX COOL General Motors made DEX COOL Extended Life Coolant standard equip ment in all North American built vehicles except Satum beginning in the 1996 model year Some assembly plants made the conversion over the 1995 Memonial Day shutdown and all remaining plants were converted for the 1996 model start up For the post Memonial Day built 1995 models filled with DEX COOL and all 1996 models the coolant maintenance change interval is 5 years or 100 000 miles whichever occurs first In 1997 that interval was increased to 5 years or 150 000 miles whichever occurs first which is where it remains today Several important factors cont
10. ami nants can deposit This occurs much like Sand is deposited by waves on the beach In cooling systems that use a drop center cap and non pressunzed coolant recovery bottle these contami nants can deposit in the valve mecha nism of the radiator cap Once the cap becomes contaminated and ceases to function as designed chances are that the system will begin to lose additional coolant more rapidly This is because once the radiator cap fails to hold pres sure a 50 50 mix of coolant and water will boil at 226 degrees Fahrenheit instead of 265 degrees Fahrenheit at 15 PSI By boiling at a lower temperature it IS much easier to exhaust the capacity of the coolant recovery bottle as the coolant expands through the failed cap at the lower temperature When the system cools off less coolant will then be avail able to be drawn back into the radiator After several cycles under these condi tions the level of coolant in the radiator can be significantly reduced and the coolant recovery bottle will be empty It is for this reason that the condition and functional ability of the radiator cap is SO important Always test the functional performance of any radiator cap whenev er cooling system performance is in question and replace any cap that does not hold the specified pressure When removing a radiator cap be sure to wipe off all sealing surfaces prior to replace ment in order to ensure a proper seal There are only a few mod
11. e PC for both Microsoft Internet Explorer and continued on page 3 In early J uly your dealership will receive TIS data CD 13 Once your Techline terminal and Tech 2 are updated with this release you ll notice your Tech 2 has anew look and some different functions while using the Service Programming System SPS application In an effort to develop more common programming for the Tech 2 between North Amenica and International opera tions GM Service Operations has taken the opportunity to update the Tech 2 functionality and logic as well The result is a Tech 2 scan tool that provides users with more information while program ming a vehicle along with more intuitive user interaction that makes the SPS application easier to use And if you re ever in Europe you ll be able to use it there too The changes made to the Tech 2 include some differences in the naviga tion from screen to screen but the fun damental steps and procedures are the same When performing remote repro continued on page 2 There are new screens to build a vehicle gramming for example it s still the Same three step process that requires requesting information from the control module or the electronic control unit ECU as it is now called on the Tech 2 uploading that data to TIS to see the available calibra tions and then returning to the vehicle to program the ECU M ore Information and Support One of the bigges
12. e on line at www gmtechlink com or copy this page and fax it to 1 248 649 5465 1 What is your job A Technician B Service Consultant C Service M anager D Other Which of the following best descnbes your business A Retail Dealership B Fleet C Other Service Facility D GM Wholesale Organization A4L80E Transmission RPO MT1 00 07 30 007 Whine Noise in Park or Neutral Service Engine Soon or Service Vehicle Soon Lamp Illuminates Replace Drive Sprocket Support Bearing 1999 2000 Buick LeSabre Park Avenue Ultra Regal Riviera 1999 2000 Chevrolet Lumina Monte Carlo Venture 1999 Oldsmobile Eighty Eight 1999 2000 Oldsmobile Intrigue Silhouette 1999 2000 Pontiac Bonneville Grand Prix Montana With 3 4L or 3 8L Engine VINs E H K 1 RPOs LA1 LX5 L36 L67 and Hydra M atic 4T65 E Hees ransmission RPOs MN3 MN7 M15 00 07 30 009 Current M odel Year Goodwrench Transmission Replacement Assembly 1998 2000 Passenger Cars and Light Duty Trucks with 4L30E 4L60E 4L80E 3140 4T40E 4T45E 4T60E 4T65E or 4T80E Automatic Transmission 00 07 30 011 Replaces 72 05 02 ACDelco Remanufactured Transmissions 1996 and Prior Passenger Cars and Trucks BODY AND ACCESSORIES 99 08 42 007A Replaces 99 08 42 007 Daytime Running Lamps DRL Disable Procedure 2000 Chevrolet and GMC C K Pickup Silverado and Sierra M L S T Models 2000 Oldsmobile Bravda Built After VIN Breakpoints 00
13. els where the system design appears sensitive to this type of contamination Although the contaminant may be similar looking dif ferent models usually have different rec ommended repairs That s because the makeup of the contaminant is often char acteristic to a model or engine family Because of this each model should be carefully evaluated to assure the appro priate repair is being made The most effective method of pre venting minimizing or eliminating the affects of contaminants is to always maintain the cooling system including the recovery bottle at its recommended full level and ensure the radiator cap is functioning properly S T Truck Equipped with 4 3L V6 Bulletin 99 06 02 012B outlines the most effective repair for this model The contaminant has been identified as iron oxide and the cleaning material recommended in the bulletin was selected because it was proven to be the most effective at cleaning this type of contaminant It is very important to follow the steps outlined in the bulletin precisely Cases where the procedure was not effective have almost always been traced to substitution of another cleaning material or the procedure was not strictly adhered to The most com mon mistakes have been 1 Running the flush while the engine operating temperature is too low Heat acts as a catalyst in this procedure and if the temperature of the system is not maintained accord ing to the bulletin specificat
14. er Automatic Light Control Cannot Be Disabled The Automatic Light Control ALC system on 1999 2000 Chevy Tracker two and four wheel drive models will tum the headlamps taillamps and instrument panel lamps on when the dash sensor ambient light sensor is Shadowed for 3 5 seconds or at Dinghy Towing Some Important Tips Earlier this Spring you received Bulletin 00 00 89 008 which contains the latest word on dinghy towing Dinghy towing refers to towing a vehicle with all four wheels on the ground for instance behind a motor home Your customers may have questions about which vehicles can be towed this way and how to do it correctly Refer them to the Owner s Manual for guidance Details are also included in the bulletin mentioned above Be sure to read the bulletin com pletely and follow the procedures exactly to avoid damage to the vehicle being towed These are the highlights Passenger Cars NOTE Cars must not be towed backward or the transmission may be damaged The bulletin spells out exactly which vehicles may be towed Generally they are those with front wheel drive and either the 4T40 E or 4T45 E automatic transaxle or the MK7 or MJ 1 5 speed manual transaxle First set the parking brake Because the ignition key must be turned from the LOCK position it s neces sary to pull the fuse s indicated in the Owner s Manual This prevents the instru ment panel or electronic PRNDL from drain ing
15. es not affect its performance When performing repairs for S T trucks U vans and W cars it may help to replace the standard radiator cap with a Standt model 10230 or 11230 radiator cap These caps have a spring center design that may be less sensitive to the effects of low coolant contamination You should also top off the radiator and fill the coolant recovery bottle to the hot mark when cold These measures will combine to guard against the vehicle operating with the cooling system low on coolant Inform the customer to check the level of the coolant recovery bottle reg ulary and to maintain it at the proper level by adding a 50 50 mix of DEX COOL and water whenever it s found to be low DEX COOL continues to perform extremely well in the majority of GM vehicles and has provided a competitive per formance and environmental advantage Other manufacturers are recognizing these benefits At present in addition to all North Amenican built GM vehicles Texaco extended life coolant DEX COOL technology is either in use or approved for use by several other European and North American manufacturers For those vehicles that may potentially be affected by cont amination the most effective method of eliminating any risk of the contaminants is to maintain the cooling system including recovery bottle at its full recommended level and ensure the radiator cap is functioning properly J ay Dankovich Sentinel Dealers Offer Insi
16. ferent soft keys than in the past Or there may not be any soft keys available at all In these cases there are new selections or function keys available When reprogramming the Vehicle Theft Deterrent VTD system for example there are just two selections available Request info and Program Previously there were soft keys for VTD PIN display and content theft information By simplifying the number of keys and in turn the number of choices it s easier to use the tool Now simply request information from the ECU in the system you re working on or program the ECU To use all the latest Tech 2 screens and their added functionality remem ber to update your Tech 2 with TIS data CD 13 Greg Powell contributed to this article continued from page 1 DGH ACCESS Dc bal Lpd abe aM BS Le Ss ee as m i re E a a o a m a a Di i Mm g T I 7 e o i Pe ont os fie wr rer at m 668 as i T a ar SS erg har or me ee z M E Pa meg r he Cee ee eee ee F B ee a E ime l I f a ce g a ia ree ape Bee ae lee eee o me Hia F r is p p ay 2000 07 02 for the current version will be stored on the GM ACCESS server until an incremental update of the next version release 2000 08 has been broadcast Incremental update 2000 08 01 will erase any previously released updates Updating the PCs in the service department with the SI 2000 incremental u
17. ght on Product Quality GM is constantly looking for ways to improve the Quality of its cars and trucks and with the help of many dealerships is doing just that along with improving customer satisfaction The Sentinel Dealer Program is a voluntary pro gram for GM dealerships where they contribute valu able insight about product quality issues and provide details about customer product concems Approximately 150 dealerships in the U S are current ly participating in the Sentinel Dealer Program As the program grows It will be rolled out to dealerships in Canada and Mexico Dealerships are selected to participate in the Sentinel Dealer Program based on several factors including geographic location sales volume and prod uct mix and willingness to help resolve product issues Currently participating dealerships also must have an ADP or Reynolds amp Reynolds computer sys tem with an electronic repair order process The condition cause and correction information from the repair orders generated by Sentinel Dealers is sent to GM through the WINS warranty system The WINS system captures the first 60 characters of the condition line the first 80 characters of the cause line and the first 60 characters of the correction line and submits that information to be put into a GM qual ity database Because of the limited amount of infor mation that can be captured it s important for partici pating dealers to be concise when summanz
18. ing condi tion cause and correction information on the repair order All of this quality related data is made available to more than 8 000 GM engineers at all levels of the design manufacturing and assembly processes One of the latest product issues GM is working on IS paint quality GM North America Paint Engineering IS asking Sentinel dealers as well as all other dealers to identify and provide feedback on warranty paint repairs All dealers who would like to participate are asked to use a digital camera to take a digital picture jog of the area on a vehicle that needs warranty paint repair and e mail the file to North America Paint Engineering The file name of the picture should be the last six digits of the VIN and e mailed to Douglas F Hart GM com along with the full VIN and a contact name and phone number at the dealership After reviewing the photo and the corresponding warranty claim data the information will be sent to the quality manager at the responsible production plant The dealership will be supplied with feedback about their paint issue and what paint quality improvements GM is going to take The paint quality program is set to run until September 1 2000 Dealers who would like to participate in the Sentinel Dealer Program to help GM improve product quality should contact J ack Pantaleo Sentinel Dealer Program manager at 1 248 874 3659 J ack Pantaleo Return to page 1 New Satellite Training Locations
19. ing may include GM release engineers supplier quality representatives the supplier service information writers and Brand Quality and TAC managers They conduct analysis brainstorming and problem solving of issues The root Cause analysis of each part is entered into the WPC database The result of the meeting Is a report of the cause complaint and corrective action From this the group develops a plan for design changes manufacturing process improvements and service manual diagnostic changes What if have questions regarding receipt of a part The WPC Website has implemented a Dealer query on its website Dealers can query for an Open Status report that lists open requests and their due dates or query individual part requests The Dealer s Business Associate Code BAC and a Request Number is neces sary for an individual request The website is lt lt www gmwpc com gt gt The website will also provide information regarding a debit Upon inserting a Request Number the dealer will receive an explanation of why a request was debited Gary McAdam and Annie Chi contributed to this article Return to page 1 2000 Cadillac Escalade Rosen Entertainment System A special phone number has been established for assistance with diag nosis of the Rosen entertainment system on 2000 Cadillac Escalade models To contact Rosen Technical Assistance call 1 800 284 7677 from 8 00 am 5 00 pm Pacific time 1999 00 Track
20. ions the 4 cleaning will not be effective 2 Failing to correctly assess the level of contaminants in the radiator before beginning NOTE As stated in the bulletin it s important to determine if coolant is able to flow through the third row down from the top of the radiator If not the radiator core must be replaced before the flush procedure This is because the cleaner must be able to flow past the contamina tion in order to clean it In cases where the system can t achieve sufficient flow around the contaminants the cleaner cannot be effective W Car U Van Equipped with 3 1L or 3 4L V6 Bulletin 00 06 02 004 describes the appropniate repair procedure for the Issues most often seen on these models Although similar in appearance to the S T issue the material on the radiator caps of these models contains no iron oxide It is much more gelatin like in texture and is usually comprised of sealer pellet residue hose material and or other conta minants It is very rare to see cases where the contamination evidenced on these radiator caps has spread beyond Return to page 1 the radiator neck If contamination is suspected beyond the radiator neck you may choose to remove the radiator end tanks for further inspection Replacement of the radiator cap wiping out the radiator neck and topping off the system is all that is normally recom mended for these models Unless other symptoms are pre sent it is
21. ndition 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 neces sarily an endorsement of the individual or the company Copyright 2000 General Motors Corporation All rights reserved Return to page 1 ing vehicle information and uploading that information to the TIS terminal it was necessary to build the vehicle again before programming Now with the new changes that have been made the Tech 2 will only ask you to build a vehicle when it needs to know that information Specifically that s when you re about to request information from an ECU The user is presented with a screen that lists vehicle makes and then up to five additional screens identifying vehicle data such as model year and vehicle type Once a vehicle has been built in the Tech 2 that data is now stored until reprogramming has taken place or infor mation is requested again from an ECU In which case the vehicle will need to be built again Before reprogramming an ECU dou ble check to make sure you re repro gramming the same ECU from which information was requested And remember when replacing an ECU it s necessary to request the secun ty code from the new ECU not the one being replaced New Soft Keys and Selections In several procedures you ll notice that the new screens on the Tech 2 have dif
22. nents 1999 2000 Chevrolet and GMC C1500 Pickup Trucks Silverado and Sierra Built Prior to VIN Breakpoints BRAKES 00 05 22 004 Brake Fluid Level and Filling Recommendations 2001 and Prior Passenger Cars and Trucks 00 05 23 003 Front Disc Brake Squeal Install New Front Disc Brake Pads 2000 Chevrolet and GMC G30 Vans Built Prior to May 2 2000 ENGINE PROPULSION SYSTEM 99 06 04 057A Replaces 99 06 04 057 Body Control Module BCM Related Service Theft Deterrent Re Leam Procedure 2000 Chevrolet Impala Monte Carlo TechLink on the Web In response to reader comments we announced in May that we re con Sidering a permanent TechLink Web site Before that can happen we need your input You can do that in one of two ways First there is this simple 5 question survey You can fill it out and fax it to 1 248 649 5465 Or better yet take a look at the sample Web site at www gmtechlink com and fill out the survey while you re there The Web site will only be up and running for a short time And we ll be tabulating the results by the end of J uly so please get your survey sent in by then Thanks for taking the time to let us know what you think 00 06 01 003 Release of New Exhaust M anifold Turbocharger Heat Shield 1998 2000 Chevrolet and GMC C6 7 Series Conventional Medium Duty Trucks With 3126 CAT 275 and 300 hp Diesel Engine 00 06 01 012 Replaces 87 61 24 Use of Surface Conditioning Discs
23. not necessary to flush the cooling system or replace the coolant on these models before their published mainte nance change interval 2000 LeSabre and Bonneville Equipped with 3 8L V6 Concerns on these models typically center around what is perceived as discolored coolant usually dark and rust colored IN appearance and a ring of contamination around the inside of the coolant recovery bottle Analysis has determined that both of these consist of excess sealer pellet material that was inad vertently installed at the assembly plant Sealer pellet installa tion has since been discontinued on these models Cleaning the coolant recovery bottle topping up the system and check ing the cap for proper function is all that is required on these models Finally as stated in bulletin 99 06 02 012B the radiator cap IS not a good indicator of the general condition of the cooling _ system Typically Suey the underside of KX the radiator cap will exhibit a greater amount of contami nation than the rest of the system due to the beach effect described earlier Likewise the color of the coolant is also not a good indicator of its general condi tion Due to fading of the dyes used with DEX COOL the coolant in some vehicles may appear pink after time The addi tion of sealer pellet stop leak material can tum the coolant color to dark red or maroon As a rule color alone is not an indication of the quality level of the coolant and do
24. pdate may take up to one hour depending on the activity on the dealership s GM ACCESS perform the SI 2000 incre mental updates when there is a low demand on the dealer Ship s computer network As the incremental updates to the CD versions of SI 2000 are broadcast to U S dealerships the SI 2000 Web site also is updated at the same time Currently to access SI 2000 on the Web log on to service gm com and enter your password and ID If your dealership does not have a password and ID for a amp kr ae as Pa ar WRA eS eee a oF oo cm Ta imlan eee i a SE Ws eg ar oF m i Shu Lee oe bhr ee se onl Instructions for updating SI 2000 is available for both Internet Explorer and Navigator users Netscape Navigator users If the incremental update has not been released yet and is not available on the dealer ship s GM ACCESS server a page not found error will be displayed when the link is selected When updating SI 2000 ona PC each SI 2000 incre mental update must be downloaded in order They cannot be executed on the PC out of the order of their release This is because each update includes only new information and is not a cumulative collection of previ ously released information All the information from each incremental update is com piled on the next release of CDs As the incremental updates are broadcast to the dealership every two weeks they are stored on the GM ACCES
25. ributed to the decision for GM to be a pioneer in the conversion to extended life coolant The convenience and financial benefit to the customer of not having to change coolants as often is obvious Additionally the result of having less used coolant to dispose of has the potential to result in Significant benefits to the environment GM also has realized significant increases in water pump durability and radiator and heater core life DEX COOL is a non silicated coolant while most conventional green coolants contain silicates One undesir able property of silicates is that they are abrasive and over time can contribute to wear of water pump Seals as well as other components Overall DEX COOL Extended Life Coolant has performed very well in GM vehicles However for a combination of reasons a few models experience vary Ing degrees of contamination to the radi ator cap and or coolant recovery bottle In some cases if the contamination is left unchecked it can cause problems in other areas of the engine cooling system We ll try to assist you in determining the Specific type of contamination present and discuss the most appropriate correc tion We re limiting our discussion to cooling systems that use a drop center design radiator cap and a non pressur ized coolant recovery bottle The Radiator Cap When a cooling system is not full the air pocket that is created in the radiator provides a beachhead where cont
26. t changes is that with the updated software the Tech 2 will now support Keyword Protocol 2000 This means you can use remote pro perform service programming on these vehicles than with the direct programming method of hooking up the vehicle and Tech 2 directly to the Techline terminal using an RS 232 cable Other changes to the Tech 2 include more informa tion on the screens that help guide the user through the procedures One of the goals when developing the new Tech 2 screens was to help technicians understand what Is happening at each stage of a procedure The screens now offer better explanations of the user options and what can be done next all to help avoid mistakes After information has gramming when working on The new screens offer more information a Cadillac Catera or Chevy Tracker Keyword Protocol is a type of communications protocol used by those models just as most North American GM models use Class 2 communication or older models use UART As you can Imagine this will make it a lot easier to The Tech2 now provides simple direction been requested from an ECU for exam ple the Tech 2 will display the message Request info is complete Tech 2 is ready to connect to PC Since many of the screens are new it s important to take the time to read each screen so that you re Sure you know exactly what the next button push will do Building a Vehicle Previously when Service
27. the battery After hooking the vehicle to the towing disabled by set ting the parking brake prior to igni tion With the engine running and the headlamps off lifting the parking brake handle to the first click will turn off the daytime running lamps DRL and tum on the instrument panel brake indicator light The DRL s will remain off and the instrument panel brake indicator light will remain on until the parking brake is released fully 2000 4 6L Engines Low Oil Message Remains On Some 2000 model year Cadillac DeVille Seville and Eldorado models equipped with the 4 6L LD8 L37 V 8 engines may exhibit a condition where the low oil message remains on after an oil change or a previous low oil condition vehicle the steering column must be unlocked The Owner s Manual specifies the appropriate ignition key position to ensure that the steering is unlocked to allow the front wheels to follow the tow vehicle and to ensure that the transmission shifter is unlocked without starting the engine Shift the transmission to Neutral Then release the parking brake Do not exceed 65 mph while dinghy towing Light Duty Trucks with 4 Wheel or All W heel Drive Certain T and K trucks may be dinghy towed with the transfer case shifted to Neutral These are listed in the Bulletin The remaining T and K trucks with 4 wheel or all wheel drive can be dinghy towed only with the propeller shafts removed For these tr
28. ucks the preferred towing method requires use of a platform trailer which lifts all four wheels from the pavement TAC Ti SS dusk The ALC If all published diagnosis has been system cannot be performed and the condition still exists it may be caused by a PCM software calibration An updated PCM calibration was released on Techline 2000 data CD 4 released to the field on March 2 2000 to cor rect for the low oil message condi tion Noise From the Aurora HVAC System If there is loose paper in the glove box of a 2001 Oldsmobile Aurora it s possible for the paper to be pulled into the HVAC system when the sys tem goes into the recirculation mode This may result in noise coming from the HVAC system as well as blower motor imbalance Advise owners to remove loose papers from the glove box Additional information about any repair procedures will be provided when available GM Technical Assistance NOTE Refer to the service manual for propeller shaft removal and installation Provisions must be made to keep the lubri cant in the transmission and dirt out If dinghy towing follow this procedure Set the parking brake Place the automatic transmission in PARK or the manual transmission in first gear After hooking the vehicle to the towing vehicle shift the transfer case to Neutral Be aware that the vehicle can roll even if the transmission is in Park or in gear Release the parking brake The
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