CAMPAIGN: REVERSE SIGNAL PRESSURE SWITCH LEAKS
SUBJECT: REVERSE SIGNAL PRESSURE SWITCH LEAKS
Models: 1995 Chevrolet and GMC P6 Chassis, C6/7 TopKick Medium Duty Conventional Trucks Equipped with Allison AT/MT Series Automatic Transmissions (RPO's MFl, MT9, ME3, ME4, ME5, and ME6)
TO: ALL GENERAL MOTORS DEALERS
General Motors of Canada Limited has determined that CERTAIN 1995 Chevrolet and GMC P6 Chassis, C6/7 TopKick Medium Duty Conventional Trucks fail to conform to Canada Motor Vehicle Safety Standard (CMVSS) 108, "Lighting Equipment" These vehicles were assembled with a transmission reverse signal switch that could leak resulting in loss of electrical contact when the transmission is in reverse. This condition could prevent the backup warning system (lights and audible alarm) from operating properly.
To correct this condition, dealers will replace the reverse signal pressure switch with one date coded 145 (14th week of 1995) or later.
VEHICLES INVOLVED:
Involved are CERTAIN 1995 Chevrolet and GMC P6 Chassis, C6/7 TopKick Medium Duty Conventional Trucks equipped with Allison AT/MT Series Automatic Transmissions built within the following VIN breakpoints:
Year Model Plant Plant Code From Through
1995 P6 Janesville J SJ106409 SJ519239 1995 C6/7 Janesville J SJ105366 SJ520157
NOTE: PLEASE CHECK DCS SCREEN 45 OR YOUR V.I.N. LISTING BEFORE PERFORMING CAMPAIGN TO ENSURE THAT THE VEHICLE IS AFFECTED. ONLY AFFECTED VIN'S WILL BE PAID.
All affected vehicles have been identified by the VIN listing provided to involved dealers with this bulletin. Any dealer not receiving a listing was not shipped any of the affected vehicles.
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 owners take possession of these vehicles.
Dealers are to perform this campaign on all involved vehicles at no charge to owners, regardless of kilometers traveled, age of vehicle, or ownership, from this time forward.
Owners, of vehicles recently sold from your new vehicle inventory with no owner information indicated on the dealer listing, are to be contacted by the dealer, and arrangements made to make the required correction according to instructions contained in this bulletin. This could be done by mailing to such owners a copy of the owner letter accompanying this bulletin. Campaign follow- up cards should not be used for this purpose, since the owner may not as yet have received the notification letter.
In summary, whenever a vehicle subject to this campaign is taken into your new or used 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.
CAMPAIGN PROCEDURE:
Refer to Section 4 of the Service Policies and Procedures Manual for the detailed procedure on handling Product Campaigns. Dealers are requested to complete the campaign on all transfers as soon as possible.
OWNER NOTIFICATION:
All owners 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 owner letter included with this bulletin). The listings provided are for campaign activity only and should not be used for any other purpose.
PARTS INFORMATION:
Parts required to complete this campaign should be ordered through regular channels, as follows:
Part Number Description Quantity/Vehicle ---------------------------------------------------------------------------- 992545 Pipe Sealant with Teflon Sealer 1 10952622 Automatic Transmission Fluid - Dexron III As Required
NOTE: The Reverse Signal Pressure Switch Assembly, Part Number 29503665, is to be obtained from your local Allison Distributor. Canadian Allison Distributors listing is attached for your convenience. If you do not know who your local Allison Distributor is, call 1-800-524-2303. Parts will be shipped within 24 hours from order placement. DO NOT ORDER THIS PART FROM GMSPO.
PARTS AND LABOR CLAIM INFORMATION:
Credit for the campaign work performed will be paid upon receipt of a properly completed campaign claim card or DCS transmission in accordance with the following:
Repair Code Description Time Allowance
6A Remove & Replace Reverse Signal Pressure Switch .5 Hr. (Includes Adding Transmission Fluid)
Time allowance includes 0.1 hour for dealer administrative detail associated with this campaign. Parts credit will be based on dealer net plus 40% to cover parts handling.
SERVICE PROCEDURE:
1. Disconnect the negative battery cable.
2. Place the transmission lever in Neutral (or in Park if equipped) and set the park brake. Check the wheels and follow all safety related precautions.
3. Disconnect the reverse signal pressure switch wiring harness connector from the 2 pin connector plug located approximately 16" from the switch assembly. The switch wiring harness assembly is located on the right-hand side of the transmission, above the fluid pan and near the center lower side of the transmission.
4. Unscrew the switch end of the harness assembly from the reverse port on the transmission using a 1- 1/16" open end wrench.
5. Apply a small amount of non-hardening LocTite Pipe Sealant with Teflon (P/N 992545), or equivalent on the threads of the new switch assembly.
IMPORTANT: DO NOT USE TEFLON TAPE. SWITCH ASSEMBLY THREADS MY NOT SEAL PROPERLY.
6. Install a new reverse signal pressure switch assembly (with a date code of 145 or later).
- Screw the threaded switch end into the reverse port in the transmission. Tighten to 4-5 lb. ft. (5 to 7 N.m).
- Reconnect the opposite end of the reverse pressure switch wiring harness into the electrical connector plug.
7. Reconnect the negative battery cable.
8. Start the engine, set the park brake and with your foot on the brake pedal, place the transmission shift control lever in reverse. Have a second person confirm the vehicle reverse warning lights and/or alarm function properly from the back of the vehicle.
9. With the engine running, place the transmission in Neutral (or in Park if equipped). Check the transmission fluid level. Add Dexron III fluid, if necessary, or an approved C-4 fluid to reach the "cold run" or "hot full" mark, depending on fluid temperature.
10. Install Campaign Identification Label.
INSTALLATION OF CAMPAIGN IDENTIFICATION LABEL
Clean surface of radiator upper mounting panel and apply a Campaign Identification Label. Make sure the correct campaign number is inserted on the label. This will indicate that the campaign has been completed.
Dear General Motors Customer:
General Motors of Canada Limited has determined that CERTAIN 1995 Chevrolet and GMC P6 Chassis, C6/7 TopKick Medium Duty Conventional Trucks fail to conform to Canada Motor Vehicle Safety Standard (CMVSS) 108, "Lighting Equipment." These vehicles were assembled with a transmission reverse signal switch that could leak resulting in loss of electrical contact when the transmission is in reverse. This condition could prevent the backup warning system (lights and audible alarm) from operating properly.
To correct this condition, your dealer will replace the reverse signal pressure switch.
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
CANADIAN ALLISON DISTRIBUTORS
British Columbia
Name City Phone No.
Detroit Diesel Allison B.C. Surrey 604-888-1211 Wheaton Pacific Ltd. Coquitlam 604-526-4566 Berk's Intertruck Ltd. Nanaimo 604-758-5217
Manitoba
Name City Phone No.
Murray Chev-Olds-Cadillac Ltd. Brandon 204-728-0130 Midwest Detroit Diesel/Allison Winnipeg 204-452-2153
Nova Scotia
Name City Phone No.
Bruce Chevrolet Inc. Middleton 902-825-3494
Newfoundland
Name City Phone No.
Hickman Motors Limited St. John's 709-726-6990
New Brunswick
Name City Phone No.
Lounsbury Company Ltd. Moncton 506-857-4345 Toner Equipment Grand Falls 506-473-6150
Quebec
Name City Phone No.
Chalut Autos Ltee. Joliette 514-861-4859 Thibeault Chevrolet & Olds Ltee. Rouyn 819-762-1751 Le Centre Routier Inc. Riviere-du-Loup 418-862-7231 Garage Diesel Cote Nord Inc. Baie Comeau 418-296-5519 A. Girardin Inc. Drummondville 819-477-3222 Christin Automobile Inc. Montreal 514-645-1050 Marlin Industrial Products Montreal 514-739-3333
Ontario
Name City Phone No.
Harper Detroit Diesel/Allison Toronto 416-259-3281 The Cliff Mills Motors Limited Oshawa 905-436-1500 S.N. Diesel Services Concord 905-669-2850 Surgenor Pontiac Buick (1975) Ltd. Ottawa 613-745-0024 Expert Garage Limited Hearst 705-362-4301 Pearson Bus Sales Limited Tilbury 519-682-2500 Toronto Truck Centre Mississauga 905-564-8333
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.
