CAMPAIGN:PROPSHAFT TUBES WELD OFF LOCATION (FORT WAYNE)

SUBJECT: REAR PROP SHAFT TUBE WELDS OFF LOCATION

MODELS: 1993 SIERRA K 10703 PICKUP TRUCKS BUILT AT FORT WAYNE

The National Traffic and Motor Vehicle 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 owner has tendered it for repair. A failure to adequately repair within 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 owner 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 solutions, every effort must be made to promptly schedule appointments with owners and to repair their vehicles as soon as possible. As you will see in reading the attached copy of the letter which is being sent to owners, the owner is being instructed to contact the GMC Truck Division Consumer Relations Office if the dealer does not remedy the condition within five days of the mutually agreed upon service date. If the condition is not remedied within a reasonable time, they are instructed how to contact the National Highway Traffic Safety Administration.

DEFECT INVOLVED

General Motors has determined that a defect which relates to motor vehicle safety exists in CERTAIN 1993 K 10703 pickup trucks (short wheel base half-ton 4-Wheel Drive) may have been built with one-piece rear prop shafts having tube to yoke welds off location. In this condition, the attachment of the front and/or rear yoke to the prop shaft tube may not withstand normal driveline torque inputs causing the tube to separate from the yoke. If the tube were to separate from a yoke while the vehicle was moving, the prop shaft could cause damage to the underbody sheet metal of the cab, or possibly detach from the vehicle.

To prevent this condition from occurring, dealers are to inspect the vehicles to determine if a Saginaw Three Rivers plant prop shaft was installed and, if so, replace it.

VEHICLES INVOLVED

Involved are CERTAIN 1993 Sierra K 10703 pickup trucks built at Fort Wayne Assembly. The involved vehicles are listed below:

SHIP TO CHARGE TO VIN DEALER DEALER --- ------- --------- 1GTEK14H6PZ536978 10582 10582 1GTEK14H6PZ537080 10582 40110 1GTEK14Z0PZ537178 53191 50107 1GTEK14K9PZ537232 56843 56843 1GTEK14K7PZ537505 10503 10503

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 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 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 the instructions contained in this bulletin.

This could be done by mailing to such owners a copy of the owner's 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.

Whenever a vehicle subject to this campaign enters your vehicle inventory, or is in your dealership for service in the future, you should take the steps necessary to ensure 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 message). 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. Raise vehicle on hoist.

2. Inspect rear prop shaft identification label for manufacturing location:

a. Saginaw-Three Rivers identification label (with bar code); the prop shaft must be replaced. Proceed to stop 3.

b. C-P-C Parma identification label (without bar code); the prop shaft is NOT involved. Proceed to step 5.

c. Identification label is not present; the prop shaft must be replaced. Procced to step 3.

3. Remove the prop shaft. Remove the four bolts and two retainers attaching the rear U-joint to the rear axle pinion flange and slide the slip yoke from the rear of the transmission.

4. Install the new prop shaft. Slide the slip yoke into the rear of the transmission and install the two retainers and four bolts attaching the rear U-joint to the rear axle pinion flange. Torque the bolts to 20 N.m (15 lbs. ft.)

5. Lower the vehicle, install the campaign completion sticker and return the vehicle to the customer.

PARTS INFORMATION

Parts will be sent to involved dealers from Adistra Corporation. DO NOT ORDER PROP SHAFT FOR THIS CAMPAIGN FROM GENERAL MOTORS SERVICE PARTS OPERATIONS (GMSPO).

Part Number Description Quantity ----------- ----------- -------- 7849724 Prop Shaft 1

(PARTS SUPPLIED AT NO CHARGE.)

WARRANTY INFORMATION

Dealers should submit an accurately filled out Warranty Repair Order on each vehicle completed under this campaign.

Labor Operation *Time Trouble **Net Number Description Allowance Code Amount ------------------------------------------------------------------- V8100 Inspect Rear 0.2 Hr. 96 $0.00 Prop Shaft Only, Replacement Not Required V8101 Inspect and 0.4 Hr. 96 $41.76 Replace Rear

* For dealer to receive Administrative Time Allowance associated with this campaign, add 0.1 hour to the Labor Operation Time Allowance.

** The "Parts Allowance" shown is 30% of the dealer net price of the prop shaft supplied (if replacement is necessary) by Saginaw Division, free of charge. In the event of prop shaft replacement, only the 30% mark-up should be submitted.

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.

Dear GMC Truck Owner:

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

General Motors has determined that a defect relating to motor vehicle safety exists in CERTAIN 1993 Sierra K 10703 pickup trucks (short wheel base half-ton 4-Wheel drive). These trucks may have been built with one-piece rear prop shafts having tube to yoke welds off location.

In this condition, the attachment of the front and/or rear yoke to the prop shaft tube may not withstand normal driveline torque inputs causing the tube to separate from the yoke. If the tube were to separate from a yoke while the vehicle was moving, the prop shaft could cause damage to the underbody sheet metal of the cab, or possibly detach from the vehicle.

To prevent this condition from occurring, your dealer will inspect and replace, if necessary, the prop shaft on your vehicle. This service will be completed for you at no charge.

Instructions for performing this service have been sent to your GMC Truck dealer. Please contact your dealer to arrange a service date. The labor time necessary to perform this service is approximately thirty minutes. Please ask your dealer how much additional time will be needed to process your vehicle.

Your GMC Truck dealer is best equipped to provide service to ensure your vehicle is corrected as promptly as possible. However, if you take your vehicle to your dealer on the agreed service date and they do not service this condition on that date or within five days, we recommend you contact GMC Truck Consumer Relations by telephone. Consumer Relations will assist you and your dealer in getting your vehicle corrected. The telephone number of the Consumer Relations office is listed in your Warranty and Owner Assistance Information Manual.

After contacting your dealer and GMC Truck Division, if you are still not satisfied that we have done our best to remedy this condition without charge 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 800-424- 9393 (Washington D.C. residents use 366-0123).

The enclosed postage paid owner reply card identifies your vehicle. Presentation of this card to your dealer will assist in making the necessary correction to your vehicle in the shortest possible time. If you have sold or traded your vehicle, please furnish us complete name and address of the person you sold or traded your vehicle to and return the card to GMC Truck.

We apologize for this inconvenience; however, we have taken this action in the interest of your safety and continued satisfaction with our product.

GMC TRUCK DIVISION GENERAL MOTORS CORPORATION

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.