CAMPAIGN: ELECTRONIC BRAKE CONTROL MODULE OR ELEC.BRAKE. Buick Park Avenue 1997

NOTE: GM OF CANADA CAMPAIGN 97020(A) IS LOCATED BELOW THE U.S. VERSION

PRODUCT SAFETY CAMPAIGN

SUBJECT: 97020(A) - ELECTRONIC BRAKE CONTROL MODULE OR ELECTRONIC BRAKE AND TRACTION CONTROL MODULE (EBCM/EBTCM)

MODELS: 1997 BUICK PARK AVENUE/ULTRA; CADILLAC DEVILLE, DEVILLE CONCOURS, DEVILLE D'ELEGANCE, ELDORADO, ELDORADO TOURING COUPE (ETC), SEVILLE LUXURY SEDAN (SLS), SEVILLE TOURING SEDAN (STS)

THIS BULLETIN CANCELS AND REPLACES BULLETIN 97020 ISSUED MAY, 1997. THE VEHICLES INVOLVED SECTION HAS BEEN EXPANDED AND THE PARTS INFORMATION SECTION HAS BEEN REVISED.

The Highway Safety Act, as amended, provides that each vehicle which is subject to a recall campaign of this type must be adequately repaired within a reasonable time after the customer has tendered it for repair. A failure to repair within sixty (60) days after tender of a vehicle is prima facie evidence of failure to repair within a reasonable time.

If the condition is not adequately repaired within a reasonable time, the customer may be entitled to an identical or reasonably equivalent vehicle at no charge or to a refund of the purchase price less a reasonable allowance for depreciation.

To avoid having to provide these burdensome remedies, every effort must be made to promptly schedule an appointment with each customer and to repair their vehicle as soon as possible. As you will see in reading the attached copy of the divisional letter that is being sent to customers, the customers are being instructed to contact the appropriate Customer Assistance Center if their dealer does not remedy the condition within five (5) days of the mutually agreed upon service date. If the condition is not remedied within a reasonable time, they are instructed on how to contact the National Highway Traffic Safety Administration.

DEFECT INVOLVED

General Motors has decided that a defect which relates to motor vehicle safety exists in certain 1997 Buick Park Avenue/Ultra; Cadillac DeVille, DeVille d'Elegance, DeVille Concours, Eldorado, Eldorado Touring Coupe (ETC), Seville Luxury Sedan (SLS), Seville Touring Sedan (STS) model vehicles.

These vehicles may exhibit a condition in which the Electronic Brake Control Module or the Electronic Brake and Traction Control Module (EBCM/EBTCM) may cause the Antilock Brake System (ABS) to cycle during a non-ABS brake application. This may result in an increase in vehicle stopping distance. If this condition were to occur in a situation where stopping distances were minimal, a vehicle crash could occur without prior warning.

To prevent the possibility of this condition occurring, dealers will replace the Electronic Brake Control Module or the Electronic Brake and Traction Control Module.

VEHICLES INVOLVED

Involved are certain 1997 Buick Park Avenue/Ultra; Cadillac DeVille, DeVille d'Elegance, DeVille Concours, Eldorado, Eldorado Touring Coupe (ETC), Seville Luxury Sedan (SLS), Seville Touring Sedan (STS) model vehicles built within the following VIN breakpoints:

PLANT YEAR DIVISION MODEL PLANT CODE FROM THROUGH

1997 Buick Park Orion "4" V4600001 V4646816 Avenue/Ultra 1997 Cadillac Deville D/Ham "U" VU200001 VU280134 1997 Cadillac Eldorado D/Ham "U" VU600001 VU615624 1997 Cadillac Seville D/Ham "U" VU800001 VU832079 1997 Cadillac Hearse D/Ham "U" VU500001 VU500166 1997 Cadillac Limo D/Ham "U" VU700001 VU700149

NOTICE:

THE FOLLOWING VEHICLES ARE ALSO INVOLVED IN THE CAMPAIGN. WARRANTY RECORDS INDICATE THEY WERE PREVIOUSLY REPAIRED UNDER WARRANTY WITH AN OLD DESIGN EBCM/EBTCM.

1G4CU5218V4649643 1G4CW52K5V4651451 1G4CU5216V4651987 1G4CU5213V4652028 1G4CU521XV4652043 1G4CU5217V4652212 1G4CU5214V4652250 1G4CW52K5V4652258 1G4CU5213V4652806 1G4CU521XV4653144 1G4CW52K6V4653984 1G4CW52K9V4654093 1G4CU5216V4655036 1G4CU5213V4655401 IG4CW52K5V4656150 1G4CU5212V4656281 1G4CU5216V4659135 1G4CU5216V4660205 1G4CU521XV4660367 1G4CW52K5V4662286

DEALERS SHOULD CONFIRM VEHICLE ELIGIBILITY THROUGH VISS (VEHICLE INFORMATION SERVICE SYSTEM) PRIOR TO BEGINNING CAMPAIGN REPAIRS.

Any dealer not receiving a computer listing with the campaign bulletin has no ADDITIONAL involved vehicles currently assigned AND SHOULD NOT ORDER CAMPAIGN PARTS FOR USE AS SHELF STOCK.

These dealer listings may contain customer names and addresses obtained from State Motor Vehicle Registration Records. The use of such motor vehicle registration data for any other purpose is a violation of law in several states. Accordingly, you are urged to limit the use of this listing to the follow-up necessary to complete this campaign.

The involved vehicle computer listing will identify the part required for repair by Subgroup Identification Code for each vehicle. Please only order the necessary parts to complete vehicles with confirmed appointments.

CUSTOMER NOTIFICATION

Customers will be notified of this campaign on their vehicles by General Motors (see copy of customer letter included with this bulletin).

COURTESY TRANSPORTATION

The availability of courtesy transportation to customers whose vehicles are involved in this campaign is of the utmost importance in maintaining customer satisfaction. Dealers are to take the steps necessary to ensure that these customers clearly understand that courtesy transportation is available and will be provided upon request at no charge. Dealers should submit such claims in the normal manner and appropriate credit will be issued. Dealers may wish to review Corporate Bulletin 68-05-02a released in October 1996 for guidelines regarding loaner/rentals.

PARTS INFORMATION

Parts are to be obtained from General Motors Service Parts Operations (GMSPO). Please refer to your "involved vehicles listing" prior to ordering requirements. Normal orders should be placed on a DRO = Daily Replenishment Order. An emergency requirement should be ordered on a CSO = Customer Special Order.

Part Involved Quantity/ Number Vehicle Description Vehicle Listing Sub Group ID Code

16265345 A or G Module - SLS, Eldorado, 1 DeVille, d'Elegance 16265346 B or H Module - STS, ETC, Concours 1 16265338 C or I Module - Park Avenue 1 - With RPO Y67,NW9,NV8 16265342 D or J Module - Park Avenue 1 - With RPO Y67 16265343 E or K Module - Park Avenue 1 - With RPO Y67 & NW9 16265344 F or L Module - Park Avenue/ Ultra 1 - With RPO Y67, NW9 & NV8 09352598 M Module - Hearse/Limo 1 -With RPO B9Q / V4U

Note: RPO codes are indicated on Service Parts Identification Label which is located on underside of the spare tire cover.

OPTION RPO DESCRIPTION (BUICK PARK AVENUE ONLY)

Y67 = TIRE INFLATION MONITOR; Part Of Instrument Package (UB7) NW9 = TRACTION CONTROL SYSTEM NV8 = MAGNASTEER; Part Of Grand Touring Package (Y56)

DEALER CAMPAIGN RESPONSIBILITY

All unsold new vehicles in dealers' possession and subject to this campaign must be held and inspected/repaired per the service procedure of this campaign bulletin before customers take possession of these vehicles.

Dealers are to service all vehicles subject to this campaign at no charge to customers, regardless of mileage, age of vehicle, or ownership, from this time forward.

Customers who have recently purchased vehicles sold from your vehicle inventory, and for which there is no customer information indicated on the dealer listing, are to be contacted by the dealer. Arrangements are to be made to make the required correction according to the instructions contained in this bulletin. This could be done by mailing to such customers a copy of the appropriate divisional customer letter accompanying this bulletin. Campaign follow-up cards should not be used for this purpose, since the customer may not as yet have received the notification letter.

In summary, whenever a vehicle subject to this campaign enters your vehicle inventory, or is in your dealership for service in the future, please take the steps necessary to be sure the campaign correction has been made before selling or releasing the vehicle.

SERVICE PROCEDURE

CADILLAC

1. Position vehicle on hoist and turn steering wheel to left (will allow for easier access to EBTCM fasteners) .

2. Reposition and/or remove radiator shroud.

3. Disconnect negative battery cable(if equipped with memory seat & mirrors, select memory setting on drivers door that corresponds with number on back of key fob. Also record radio settings prior to disconnecting cable).

NOTE: PCM, IPC and PZM Diagnostic Trouble Codes will be set. These codes should be cleared when the battery is re- connected.

4. Remove air cleaner.

5. Disconnect EBTCM connector.

6. Hoist vehicle.

7. Remove lower radiator air deflector (3 bolts).

8. Remove left lower close-out panel push pins (2) in wheel well liner.

9. Loosen (2) rear EBTCM module insulator mounting nuts.

10. Loosen front EBTCM module insulator nut. Lift module and remove insulator to gain access to front mount stud.

11. Raise EBTCM module from bracket.

12. Remove EBTCM module front mounting stud (torx 30).

13. Remove lower EBTCM module mounting bolts (2) (torx 25).

14. Lower vehicle.

15. Remove upper EBTCM module mounting bolts (2).

CAUTION:

Clean module prior to removal. Do not pry or twist EBTCM. Damage may occur to sealing surface of brake pressure modulator valve (BPMV) or internal pin connectors.

16. Remove EBTCM module from vehicle.

NOTE: Be sure to follow proper procedures for Electrical Connector cleaning prior to installing the new EBTCM module. Clean BPMV gasket surface with alcohol.

17. Install new EBTCM module in vehicle.

18. Install upper EBTCM module bolts (2) (hand tighten - bolts to be torqued in step 26).

19. Raise vehicle.

20. Install front mounting stud and torque to 14 Nm (10 lb. ft.).

21. Install lower EBTCM module bolts (2), torque to 4.5 Nm (40 lb. in.).

22. Install front insulator, lower EBTCM module into bracket, and install insulator nut. Torque insulator nuts (3) to 10 Nm (7.5 lb. ft.).

23. Install lower close-out panel push pins (2) at the wheel well liner.

24. Install lower radiator air deflector (3 bolts).

25. Lower vehicle.

26. Torque upper EBTCM module bolts (2) to 4.5 Nm (40 lb. in.).

27. Install EBTCM connector.

28. Install air cleaner.

29. Connect negative battery cable. Clear Diagnostic Trouble Codes. if equipped, reprogram memory seat & mirrors by pressing set button and button #1 or #2 on drivers door. Selection must correspond to number on back of key fob. Ensure radio station are reset to stations previously recorded. Set clock to correct time.

30. Install radiator shroud.

31. Re-calibrate MAGNASTEERO. Refer to Section 8A-45-3 of the Service Manual. MAGNASTEER@ can be found under Diagnosis - Chassis.

32. Install the GM Campaign Identification Label.

BUICK

1. Disconnect negative battery cable(ensure seat & mirror are in position #1 and radio settings are recorded prior to disconnecting cable).

NOTE: PCM, IPC and PZM Diagnostic Trouble Codes will be set. These codes should be cleared when the battery is re- connected.

2. Remove air cleaner door.

3. Disconnect EBCM/EBTCM connector.

4. Remove front bracket to frame rail bolt and front bracket to EBCM/EBTCM bolt. Remove front mounting bracket.

5. Remove EBCM/EBTCM module mounting bolts (4) (torx 25).

CAUTION:

Clean module prior to removal. Do not pry or twist EBTCM. Damage may occur to sealing surface of brake pressure modulator valve (BPMV) or internal pin connectors.

6. Remove EBCM/EBTCM module from vehicle.

NOTE: Be sure to follow proper procedures for Electrical Connector cleaning prior to installing the new EBCM/ EBTCM module. Service Bulletin # 73-50-21 (estimated release date: June 1997), contains additional connector information. Clean BPMV gasket surface with alcohol.

7. Install new EBCM/EBTCM module in vehicle. Install front mounting bracket. Install front bracket to frame rail bolt and front bracket to EBCM/EBTCM bolt front mounting stud and torque to 14 Nm (10 lb. ft.).

8. Torque EBCM/EBTCM module bolts (4)to 4.5 Nm (40 lb. in.).

9. Install EBCM/EBTCM connector.

10. Install air cleaner cover.

11. Connect negative battery cable. Clear Diagnostic Trouble Codes, ensure seat & mirror are in position #1 and radio/clock are properly set.

12. Re-calibrate MAGNASTEER@ (if equipped). Refer to Steering Controls Cell 45 in Electrical Diagnosis. MAGNASTEERS can be found under Diagnosis - Chassis.

13. Install the GM Campaign Identification Label.

CAMPAIGN IDENTIFICATION LABEL

Each vehicle corrected in accordance with the instructions outlined in this Product Campaign Bulletin will require a "Campaign Identification Label". Each label provides a space to include the campaign number and the five (5) digit dealer code of the dealer performing the campaign service. This information may be inserted with a typewriter or a ball point pen.

Each "Campaign Identification Label" is to be located on the radiator core support in an area which will be visible when the vehicle is brought in by the customer for periodic servicing. When installing the Campaign Identification Label, be sure to pull the tab to allow adhesion of the clear protective covering. Additional Campaign Identification Labels can be obtained from VISPAC Incorporated by calling 1-800-269-5100 (Monday- Friday, 8:00 a.m. to 4:30 p.m. EST). Ask for Item Number S-1015 when ordering.

Apply the "Campaign Identification Label" only on a clean, dry surface.

CLAIM INFORMATION

Submit a Product Campaign Claim with the information indicated below:

* REPAIR PART FAILED PARTS LABOR LABOR PERFORMED COUNT PART NO. ALLOW CC-FC 0P HOURS

Replace 1 *** ** MA-96 V0036 EBCM/EBTCM Control Module - BUICK 0.5 CADILLAC 0.8

* For Campaign Administrative Allowance, add 0.1 hours to the "Labor Hours".

** The "Parts Allowance" should be the sum total of the current GMSPO Dealer Net price plus 40% for all parts needed to complete the repair.

*** Use applicable part number as indicated in the Parts Information section.

Refer to the General Motors Corporation Claims Processing Manual for details on Product Campaign Claim Submission.

November, 1997

Dear <Division(s)> Customer:

This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act.

Reason For This Recall: General Motors has decided that a defect which relates to motor vehicle safety exists in certain 1997 Buick Park Avenue/Ultra; Cadillac DeVille, DeVille d'Elegance, DeVille Concours, Eldorado, Eldorado Touring Coupe (ETC), Seville Luxury Sedan (SLS), Seville Touring Sedan (STS) model vehicles.

What Will Be Done: To prevent the possibility of this condition occurring, your dealer will replace the Electronic Brake Control Module or the Electronic Brake and Traction Control Module on your vehicle. This service will be performed for you at no charge.

How Long Will The Repair Take: The length of time required to perform this service correction is approximately 25 to 40 minutes. Additional time may be required to schedule and process your vehicle. If your dealer has a large number of vehicles awaiting service, this additional time may be significant. Please ask your dealer if you wish to know how much additional time will be needed.

Contacting Your Dealer: Please contact your dealer as soon as possible to arrange a service date and so parts can be ordered. Instructions for making this correction have been sent to your dealer.

Your <Division> dealer is best equipped to obtain parts and provide services to correct your vehicle as promptly as possible. Should your dealer be unable to schedule a service date within a reasonable time, you should contact the appropriate Customer Assistance/Relations Center listed on the next page.

Deaf, Hearing Impaired Division Number or Speech Impaired

Buick 1-800-521-7300 1-800-832-8425 Cadillac 1-800-458-8006 1-800-833-2622

Utilizes Telecommunication Devices for the Deaf/Text Telephones (TDD/TTY)

If, after contacting the appropriate customer assistance center, you are still not satisfied that we have done our best to remedy this condition without charge and within a reasonable time, you may wish to write the Administrator, National Highway Traffic Safety Administration, 400 Seventh Street, S.W. Washington, D.C. 20590 or call 1-800-424-9393 (Washington D.C. residents use 202-366-0123).

Customer Reply Card: The enclosed customer reply card identifies your vehicle. Presentation of this card to your dealer will assist in making the necessary correction in the shortest possible time. If you no longer own this vehicle, please let us know by completing the postage paid reply card and returning it to us.

Courtesy Transportation: Your dealer will provide you with shuttle service or some other form of courtesy transportation while your vehicle is at the dealership for this repair. Please refer to your Owner's Manual and ask your dealer for details on Courtesy Transportation. We are sorry to cause you this inconvenience; however, we have taken this action in the interest of your safety and continued satisfaction with our products.

<Division(s)> GENERAL MOTORS CORPORATION

** CANADIAN VERSION **

PRODUCT SAFETY CAMPAIGN

SUBJECT: CAMPAIGN 97020 - ELECTRONIC BRAKE CONTROL MODULE OR ELECTRONIC BRAKE AND TRACTION CONTROL MODULE (EBCM/EBTCM) ----------------------------------------------------------

MODELS: 1997 BUICK PARK AVENUE/ULTRA; CADILLAC DEVILLE, DEVILLE CONCOURS, DEVILLE D'ELEGANCE, ELDORADO, ELDORADO TOURING COUPE (ETC), SEVILLE LUXURY SEDAN (SLS), SEVILLE TOURING SEDAN (STS) ------------------------------------------------------------

THIS BULLETIN CANCELS AND REPLACES BULLETIN 97020 ISSUED MAY, 1997. THE VEHICLES INVOLVED SECTION HAS BEEN EXPANDED AND THE PARTS INFORMATION SECTION HAS BEEN REVISED.

DEFECT INVOLVED

General Motors of Canada Limited has decided that a defect which relates to motor vehicle safety exists in certain 1997 Buick Park Avenue/Ultra; Cadillac DeVille, DeVille d'Elegance, Deville Concours, Eldorado, Eldorado Touring Coupe (ETC), Seville Luxury Sedan (SLS), and Seville Touring Sedan (STS) model vehicles. These vehicles may exhibit a condition in which the Electronic Brake Control Module or the Electronic Brake and Traction Control Module (EBCM/EBTCM) may cause the Antilock Brake System (ABS) to cycle during a non-ABS brake application. This may result in an increase in vehicle stopping distance. If this condition were to occur in a situation where stopping distances were minimal, a vehicle crash could occur without prior warning. To prevent the possibility of this condition occurring, dealers will replace the Electronic Brake Control Module or the Electronic Brake and Traction Control Module.

VEHICLES INVOLVED

Involved are certain 1997 Buick Park Avenue/Ultra; Cadillac DeVille, DeVille d'Elegance, Deville Concours, Eldorado, Eldorado Touring Coupe (ETC), Seville Luxury Sedan (SLS), and Seville Touring Sedan (STS) model vehicles built within the following VIN breakpoints:

PLANT YEAR DIVISION MODEL PLANT CODE FROM THROUGH

1997 Buick Park Avenue/Ultra Orion "4" V4600001 V4646816 1997 Cadillac DeVille D/Ham "U" VU200001 VU280134 1997 Cadillac Eldorado D/Ham "U" VU600001 VU615624 1997 Cadillac Seville D/Ham "U" VU800061 VU832079 1997 Cadillac Hearse D/Ham "U" VU500001 VU500166 1997 Cadillac Limo D/Ham "U" VU700001 VU700149

NOTICE:

THE FOLLOWING VEHICLES ARE ALSO INVOLVED IN THE CAMPAIGN. WARRANTY RECORDS INDICATE THEY WERE PREVIOUSLY REPAIRED UNDER WARRANTY WITH AN OLD DESIGN EBCM/EBTCM.

1G4CU5218V4649643 1G4CW52K5V4651451 1G4CU5216V4651987 1G4CU5213V4652028 1G4CU521XV4652043 1G4CU5217V4652212 1G4CU5214V4652250 1G4CW52K5V4652258 1G4CU5213V4652806 1G4CU521XV4653144 1G4CW52K6V4653984 1G4CW52K9V4654093 1G4CU5216V4655036 1G4CU5213V4655401 1G4CW52K5V4656150 1G4CU5212V4656281 1G4CU5216V4659135 1G4CU5216V4660205 1G4CU521XV4660367 1G4CW52K5V4662286

NOTE: PLEASE CHECK DCS SCREEN 445 OR YOUR V.I.N. LISTING BEFORE PERFORMING CAMPAIGN TO ENSURE THAT THE VEHICLE IS AFFECTED. ONLY AFFECTED VIN'S WILL BE PAID.

Involved vehicles have been identified by Vehicle Identification Number. Computer listings containing the complete Vehicle Identification Number, customer name and address data have been prepared, and are being furnished to involved dealers with the campaign bulletin. The customer name and address data furnished will enable dealers to follow-up with customers involved in this campaign. Any dealer not receiving a computer listing with the campaign bulletin has no additional involved vehicles currently assigned AND SHOULD NOT ORDER CAMPAIGN PARTS FOR USE AS SHELF STOCK.

PARTS INFORMATION

Parts required to complete this campaign are to be obtained from General Motors Service Parts Operations (GMSPO). Please refer to your "involved vehicles listing" prior to ordering requirements.

Involved Veh. List. Sub Group Part Num. ID Code Description Quantity/Vehicle

16265345 A or G Module-SLS, Eldorado, DeVille, 1 d'Elegance 16265346 B or H Module - STS, ETC, Concours 1 16265338 C or I Module - Park Avenue - 1 Without RPO Y67, NW9, NV8 16265342 D or J Module - Park Avenue - 1 With RPO Y67 16265343 E or K Module - Park Avenue - 1 With RPO Y67 & NW9 16265344 F or L Module - All Ultra 1 Module - Park Avenue - With RPO Y67, NW9 & NV8 9352598 M Module Hearse/Limo - 1 With RPO B9Q /V4U

NOTE: RPO codes are indicated on Service Parts Identification Label which is located on underside of spare tire cover.

OPTION RPO DESCRIPTION (BUICK PARK AVENUE ONLY)

Y67 = TIRE INFLATION MONITOR; Part of SE Package NW9 = TRACTION CONTROL SYSTEM; Part of Instrument Package (UB7) NV8 = MAGNASTEER; Part of Grand Touring Package (Y56)

CUSTOMER NOTIFICATION

All customers of record at the time of campaign release are shown on the attached computer listing and have been notified by first class mail from General Motors (see copy of customer letter included with this bulletin).

DEALER CAMPAIGN RESPONSIBILITY

All unsold new vehicles in dealers possession and subject to this campaign must be held and inspected/repaired per the service procedure of this campaign bulletin before customers take possession of these vehicles.

Dealers are to service all vehicles subject to this campaign at no charge to customers, regardless of mileage, age of vehicle, or ownership, from this time forward.

Customers who have recently purchased vehicles sold from your vehicle inventory, and for which there is no customer information indicated on the dealer listing, are to be contacted by the dealer.

Arrangements are to be made to make the required correction according to the instructions contained in this bulletin. This could be done by mailing to such customers a copy of the appropriate customer letter accompanying this bulletin.

In summary, whenever a vehicle subject to this campaign enters your vehicle inventory, or is in your dealership for service in the future, you must take the steps necessary to be sure the campaign correction has been made before selling or releasing the vehicle.

SERVICE PROCEDURE

CADILLAC

1. Position vehicle on hoist and turn steering wheel to left (will allow for easier access to EBTCM fasteners).

2. Reposition and/or remove radiator shroud.

3. Disconnect negative battery cable (if equipped with memory seat and mirrors, select memory setting on driver's door that corresponds with number on back of key fob. Also record radio settings prior to disconnecting cable).

NOTE: PCM, IPC and PZM Diagnostic Trouble Codes will be set. These codes should be cleared when the battery is reconnected.

4. Remove air cleaner.

5. Disconnect EBTCM connector.

6. Hoist vehicle.

7. Remove lower radiator air deflector (3 bolts).

8. Remove left lower close-out panel push pins (2) in wheel well liner.

9. Loosen (2) rear EBTCM insulator mounting nuts.

10. Loosen front EBTCM module insulator nut. Lift module and remove insulator to gain access to front mount stud.

11. Raise EBTCM module from bracket.

12. Remove EBTCM module front mounting stud (torque 30).

13. Remove lower EBTCM module mounting bolts (2) (torque 25).

14. Lower Vehicle

15. Remove upper EBTCM module mounting bolts (2).

CAUTION:

Clean module prior to removal. Do not pry or twist EBTCM. Damage may occur to sealing surface of brake pressure modulator valve (BPMV) or internal pin connectors.

16. Remove EBTCM module from vehicle.

NOTE: Be sure to follow proper procedures for Electrical Connector cleaning prior to installing the new EBTCM module. Clean BPMV gasket surface with alcohol.

17. Install new EBTCM module in vehicle.

18. Install upper EBTCM module bolts (2) (hand tighten - bolts to be torqued in step 26).

19. Raise vehicle.

20. Install front mounting stud and torque to 14 N-m (I 0 lb. ft.).

21. Install lower EBTCM module bolts (2), torque to 4.5 N-m (40 lb. in.).

22. Install front insulator, lower EBTCM module into bracket, and install insulator nut. Torque insulator nuts (3) to I 0 N-m (7.5 lb. ft.).

23. Install lower close-out panel push pins (2) at the wheel well liner.

24. Install lower radiator air deflector (3 bolts).

25. Lower vehicle.

26. Torque upper EBTCM module bolts (2) to 4.5 N-m (40 lb. in.).

27. Install EBTCM connector.

28. Install air cleaner.

29. Connect negative battery cable. Clear Diagnostic Trouble Codes. If equipped, reprogram memory seat and mirrors by pressing set button and button #1 or #2 on driver's door. Selection must correspond to number on back of key fob. Ensure radio station are reset to stations previously recorded. Set clock to correct time.

30. Install radiator shroud.

31. Recalibrate MAGNASTEERS. Refer to Section 8A-45-3 of the Service Manual. MAGNASTEERS can be found under Diagnosis - Chassis.

32. Install Campaign Identification Label.

BUICK

1. Disconnect negative battery cable (ensure seat and mirror are in position #1 and radio settings are recorded prior to disconnecting cable).

NOTE: PCM, IPC and PZM Diagnostic Trouble Codes will be set. These codes should be cleared when the battery is reconnected.

2. Remove air cleaner door.

3. Disconnect EBCNUBTCM connector.

4. Remove front bracket to frame rail bolt and front bracket to EBCM/EBTCM bolt. Remove front mounting bracket.

5. Remove EBCM/EBTCM module mounting bolts (4) (torque 25).

CAUTION:

Clean module prior to removal. Do not pry or twist EBTCM. Damage may occur to sealing surface of brake pressure modulator valve (BPMV) or internal pin connectors.

6. Remove EBCM/EBTCM module from vehicle.

NOTE: Be sure to follow proper procedures for Electrical Connector cleaning prior to installing the new EBCM/EBTCM module. Service Bulletin # 73-50-21 (estimated release date: June 1997), contains additional connector information. Clean BPMV gasket surface with alcohol.

7. Install new EBCNWBTCM module in vehicle. Install front mounting bracket. Install front bracket to frame rail bolt and front bracket to EBCM/EBTCM bolt front mounting stud and torque to 14 N-m (I 0 lb. ft.).

8. Torque EBCM/EBTCM module bolts (4) to 4.5 N-m (40 lb. in.).

9. Install EBCM/EBTCM connector.

10. Install air cleaner cover.

11. Connect negative battery cable. Clear Diagnostic Trouble Codes, ensure seat and mirror are in position #1 and radio/clock are properly set.

12. Recalibrate MAGNASTEER (if equipped). Refer to Steering Controls Cell 45 in Electrical Diagnosis. MAGNASTEER can be found under Diagnosis - Chassis.

13. Install Campaign Identification Label.

CAMPAIGN IDENTIFICATION LABEL

Each vehicle corrected in accordance with the instructions outlined in this Product Campaign Bulletin will require a "Campaign Identification Label." Each label provides a space to include the campaign number and the five (5) digit dealer code of the dealer performing the campaign service. This information may be inserted with a typewriter or a ball point pen.

Each "Campaign Identification Label" is to be located on the radiator core support in an area which will be visible when the vehicle is brought in by the customer for periodic servicing. Additional Campaign Identification Labels can be obtained from DGN by calling 1-800-668-5539 (Monday-Friday, 8:00 a.m. to 5:00 p.m. EST). Ask for Item Number GMP 91 when ordering.

Apply the "Campaign Identification Label" only on a clean, dry surface.

CLAIM INFORMATION

Submit a Product Campaign Claim with the information indicated below:

REPAIR PERFORMED PART FAILED PARTS LABOUR LABOUR COUNT PART NO. ALLOW CC-FC 0P HOURS

Replace EBCM/EBTCM Control 1 MA-96 V0036 Module -

BUICK 0.5

CADILLAC 0.8

* For Campaign Administrative Allowance, add 0.1 hours to the "Labour Hours".

** The "Parts Allowance" should be the sum total of the current GMSPO Dealer Net price plus 40% or all parts needed to complete the repair.

*** Use applicable part number as indicated in the Parts Information section.

Refer to the General Motors Claims Processing Manual for details on Product Campaign Claim Submission.

November 1997

Dear General Motors Customer:

To prevent the possibility of this condition occurring, your GM dealer will replace the Electronic Brake Control Module or the Electronic Brake and Traction Control Module on your vehicle.

This service will be provided for you at no charge.

Please contact your GM dealer as soon as possible to arrange a service date.

If parts are required, ask your dealer for details regarding their availability. If parts are not in stock, they can be ordered before scheduling your service date.

This letter identifies your vehicle. Presentation of this letter to your dealer will assist their Service personnel in completing the necessary correction to your vehicle in the shortest possible time.

We are sorry to cause you this inconvenience; however, we have taken this action in the interest of your continued satisfaction with our products.

Customer Support Department General Motors of Canada Limited

General Motors bulletins 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.