CAMPAIGN: INCORRECT HOOD HINGE MATERIAL

SUBJECT: INCORRECT HOOD HINGE MATERIAL

MODELS: 1993 GMC TRUCK VANDURA 3500 HD MODELS

General Motors has determined that some 1993 GMC Truck Vandura 3500 models may have been shipped with hood hinges manufactured from an unspecified steel. Instead of the specified SAE 1008-1010 steel, some hinges were produced using a steel similar to SAE 1212, which is more brittle. A stress crack could occur in the hinge during forming as a result of using the unspecified steel. In the event both hinges have completely fractured and the fiberglass hood is pulled forward to open it, the hood may rest on the front frame crossmember behind the plastic bumper fascia, and would pivot about the bottom edge of the hood. Tether cables attached to the back of the hood would limit how far the hood would open. To prevent this condition, both hood hinges need to be replaced.

VEHICLES INVOLVED

Involved are certain 1993 Vandura 3500 HD Models built within the following VIN breakpoints:

Make Model Plant VIN Year ----- --- ---- ----- GMC 1993 Flint From Truck 1GDJH32K0P3500001 Through 1GDKH32K5P3500483

The specific vehicles involved in this campaign have been identified by Vehicle Identification Number 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) prior to beginning campaign repairs.

DEALER CAMPAIGN RESPONSIBILITY

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. Dealers are to correct all affected vehicles in new and used vehicle stock prior to their sale.

Whenever a vehicle subject to this campaign is taken into your new or used vehicle inventory, or it is in your dealership for service in the future, you should take the steps necessary to ensure the campaign correction has been made before reselling or releasing the vehicle.

Owners of vehicles recently sold from your new vehicle inventory are to be contacted by the dealer and arrangements made to make the required correction according to instructions contained in this bulletin. 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. Disconnect the hood wiring harness by removing the retaining bolt from the radiator support.

2. Remove the lower hinge pin retaining bolts (Figure 1).

3. Remove the hood check cables.

- Have another person ready to support the hood. Remove the locking pin and the pin from the hood side of the vehicle.

4. Remove the hood assembly from the vehicle with the assistance of another person.

5. Remove the hinges from the hood by removing the 6 nuts (per hinge) (Figure 2).

6. Remove the plastic hinge bushings from the old hinges and install them into the new hinges. Discard the old hinges.

7. Install the new hinges to the hood by installing the 6 nuts (per hinge). Torque the nuts to 30 N-m (22 ft. lbs).

NOTICE: Use the paint outline left on the hood to align the hinge.

8. Install the hood assembly to the vehicle with the assistance of another person.

9. Install the hood hinge pin bolts. Torque the bolts to 34 N-m (25 ft. lbs.)

10. Install the hood check cables.

11. Reconnect the wiring harness to the radiator support.

NOTICE: Be careful not to disturb the air conditioning vacuum reservoir located near the cowl area.

12. Install "Campaign Identification Label".

PARTS INFORMATION

Parts are to be obtained from General Motors Service Parts Operation (GMSPO). To ensure that these parts will be obtained as soon as possible, they should be ordered from GMSPO on a C.I.O order with no special instruction code but order under an advise code (2).

Part Number Description Quantity ----------- ----------- -------- 15687981 Hinge (LH) 1 15687982 Hinge (RH) 1

WARRANTY INFORMATION

Dealers should submit a warranty claim on each vehicle completed under this campaign.

Labor *Time Trouble Op. Description Allowance Code Number ----------- ---------- ------- ------ V7910 Removing and 0.5 hr. 96 Replacing Both Hood Hinges

* For dealer to receive Administrative Tim Allowance associated with this campaign, add 0. hour to the Labor Operation Time Allowance.

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 Claims Processing Manual" #P9119.

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.