CAMPAIGN: TYPE 2A HEADLAMP CONNECTOR WIRING INCORRECT

MODELS: 1982 CABALLERO

General Motors has determined that some early production 1982 GMC Truck Caballero models may exhibit a condition whereby the outboard high beam lamp filaments glow when the low beam headlamps are on. The low beam filaments are on in high beam.

Incorrectly indexed outboard headlamp wiring harness connectors will result in incorrect filament illumination in either the high or low beam mode.

In order to correct this condition dealers are being requested to inspect and, if necessary, reindex both outboard headlamp wiring harness connectors according to the instructions outlined in this bulletin.

VEHICLES INVOLVED

All 1982 GMC Truck Caballero models within the following vehicle parameters:

Plant From Through

Arlington 1GTCW80K8CR500001 1GTCW80A7CR500210

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.

DEALER CAMPAIGN RESPONSIBILITY

All involved vehicles are not to be sold by the dealer until campaign modification has been completed.

OWNER NOTIFICATION

No owner notification will be required since all involved vehicles are in dealer stock.

SERVICE PROCEDURE

1. Disconnect battery cables. Remove battery hold down and remove battery.

2. Remove both outboard headlamp wiring connectors and inspect for proper indexing of wiring as follows:

a. FROM WIRING HARNESS SIDE OF CONNECTOR - Hold connector in your hand so that wiring is positioned at 3, 6 and 9 o'clock. The wiring is correct when:

Tan wire is in 3 o'clock position. Light green wire is in 6 o'clock position. Black wire is in 9 o'clock position.

b. If wiring is indexed correctly. reinstall connectors, battery, and battery hold down. Connect battery cabled. No further action is necessary.

c. If wiring is indexed incorrectly, proceed to step 3.

3. Reindex wiring at both outboard headlamp connectors to agree with Step 2a above.

4. Reinstall connectors to headlamps.

5. Reinstall battery and battery hold down. Connect battery cables.

6. Check headlamp operation.

WARRANTY INFORMATION

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

Labor *Time Operation Allow- Trouble Number Description ance Code

V1000 Inspect and 0.2 Hr. 96 reindex outboard headlamp wiring harness connector according to the instructions contained in this bulletin

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

CAMPAIGN IDENTIFICATION LABEL

Each vehicle modified 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 five (5) digit Dealer Code of the dealer performing the campaign service. This information may be inserted with a typewriter or ballpoint 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 4 of your dealership's "GMC Truck Service Policies and Procedures Manual" (revised November 1, 1980).

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.