CAMPAIGN: INCORRECT HOOD HINGE MATERIAL

Subject: INCORRECT HOOD HINGE MATERIAL

Models: 1993 GMC Truck Vandura 3500 HD and Chevy Van 30 HD Models

General Motors of Canada Limited has determined that some 1993 GMC Truck Vandura 3500 HD Chevy Van 30 HD 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 the following 1993 Vandura 3500 HD and Chevy Van 30 HD models built at the Flint Assembly Plant.

YEAR MODEL VIN VIN ---- ----- --- --- 1993 Chevrolet 1GBKH32N0P3304986 1GBKH32N8P3302290 1GBKH32N2P3305492 1GBKH32N9P3305425 1GBKH32N4P3304862

1993 GMC 1GDJH32K6P3500388 1GDKH32K9P3500406 1GDJH32N0P3500235 1GDKH32NXP3500411 1GDKH32K2P3500408 1GDKH32NlP3500457 1GDKH32K3P3500417 1GDKH32N3P3500234 1GDKH32K3P3500420 1GDKH32N4P3500470 1GDKH32K5P3500242 1GDKH32N5P3500249 1GDKH32K5P3500418 1GDKH32N5P3500445 1GDKH32K5P3500421 1GDKH32N7P3500236 1GDKH32K7P3500405 1GDKH32N9P3500237

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 dealer's 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

Parts required to complete this campaign should be ordered through regular channels, as follows:

Part Number Description Quantity/Vehicle ----------- ----------- ---------------- 15687981 Hinge Asm (LH) 1

15687982 Hinge Asm (RH) 1

PARTS AND LABOUR 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 Description Time Allowance ------ ----------- -------------- 2A Removing and Replacing Both Hood Hinges 0.6

Time allowance includes 0.1 hour for dealer administrative detail associated with this campaign. Parts credit will be based on dealer net plus 30% to cover parts handling.

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). (Page 4)

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). (Page 5)

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.).

Note: 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.

Note: Be careful not to distribute the air conditioning check ball located near the cowl area.

12. 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.

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.