Campaign - No Drive or Reverse Gear/Noisy While Driving: Overview
GMC NUMBER: 95-C-32AGROUP: 71 Automatic Transmission/Transaxle
DATE: August 1995
SUBJECT:
NO DRIVE/REVERSE OR NOISE WHILE DRIVING
MODELS:
1995 C/K, P TRUCKS, AND G VANS EQUIPPED WITH 4L80-E AUTOMATIC TRANSMISSION (MT1)
THIS BULLETIN CANCELS AND REPLACES BULLETIN 95-C-32 ISSUED JUNE, 1995.
THE WARRANTY INFORMATION HAS BEEN REVISED FOR THE G-VAN (LABOR OPERATION V9598). THE TIME ALLOWANCE 15 2.4 HOURS.
ALL COPIES OF 95-C-32 SHOULD BE DESTROYED.
General Motors has determined that CERTAIN 1995 C/K, P trucks, G vans equipped with 4L80-E automatic transmission (MT1) may experience a failure in the output and reaction gear set due to a surface finish discrepancy of the pinion pins. The pinion bearing surface may spall prematurely causing loss of support to the pinion gear, which may result in gear set fatigue failure. The vehicle may first experience noise and then loss of forward and reverse gears.
To correct this condition, dealers are to replace the transmission assembly using the procedure outlined in this bulletin.
VEHICLES INVOLVED
Involved are CERTAIN 1995 C/K, P trucks, G vans equipped with 4L80-E automatic transmission (MT1) built within the VIN breakpoints as shown.
The specific vehicles involved in this campaign have been identified by Vehicle Identification Number (VIN) Computer Listings. These listings are furnished to all involved dealers with the campaign bulletin. Dealers should confirm vehicle eligibility through VISS (Vehicle Information Service System) or SERVICENET prior to beginning campaign repairs.
WARRANTY INFORMATION
Dealers should submit a warranty claim on each vehicle completed under this campaign.
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 five (5) digit dealer code of the dealer performing the campaign service. This information may be inserted with a typewriter or 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 for periodic servicing by the owner.
Apply "Campaign Identification Label" only on a clean, dry surface.
ADMINISTRATIVE PROCEDURE
Procedures covering this campaign are outlined in Section V of your dealership's "GMC Truck Warranty Claims Processing Manual" # P9119 Rev. 2/94.
DEALER CAMPAIGN RESPONSIBILITY
All unsold 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 service all vehicles subject to this campaign at no charge to owners, regardless of mileage, age of vehicle, or ownership, from this time forward.
Owners of vehicles recently sold from your vehicle inventory are to be contacted by the dealer and arrangements made to make the required correction according to instructions contained in 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, please take the steps necessary to be sure the campaign correction has been made before selling or releasing the vehicle.
If the name and address of the owner of an involved vehicle was unavailable to GMC Truck Division at the time of campaign initiation, the dealer must determine the owner's name and address from the dealership sales records. Please provide this information directly on the second copy of the listing next to the applicable VIN so that our records may be updated and the appropriate notification mailed to the owner. This second copy should then be submitted to the address listed below in the previously supplied yellow campaign envelopes.
GMC Truck Division
General Motors Corporation
101 Union Street
Plymouth, Michigan 48170
OWNER NOTIFICATION
Owners will be notified of this campaign on their vehicles by GMC Truck Division (see copy of owner letter included with this bulletin). A listing of owner names and addresses has been furnished to the involved dealers to enable dealers to follow up with owners involved in this campaign. This listing may contain owner 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 this campaign.
SERVICE PROCEDURE
1. The transmission assembly should be replaced following the procedures outlined in the appropriate 1995 service manual.
2. Install Campaign Identification Label.
PARTS INFORMATION
Parts are to be obtained from General Motors Service Parts operation (GMSPO). To ensure parts are obtained as soon as possible, order them from GMSPO on a C.I.O. order with no special instruction code but order under an advise code (2). All Goodwrench Parts System test dealers should order on a "P" order.
NOTE:
Replace the transmission assembly with the same model as originally installed into the vehicle. The model identification is located on the I.D. tag on the right rear of the transmission case.
IMPORTANT:
Transmission cores must be returned to GMSPO as the new transmission is installed. The original transmission assembly must be placed in the replacement transmission container and returned through the customary GMSPO process.