CAMPAIGN: ENGINE / ECM HARNESS MISROUTED

MODELS: 1986 Buick Century & Olds. Ciera Models Equipped With RPO LG3 3.8L Engine

TO: ALL AFFECTED DEALERS:

DEFECT INVOLVED:

General Motors of Canada has determined that some early 1986 Buick & Olds 'A' Car models equipped with RPO LG3 3.8L engines may have been assembled with the engine ECM wiring harness misrouted. This may result in the wiring harness shorting against the exhaust manifold in the engine compartment.

To prevent this condition from occurring, the engine wiring harness will be inspected and where required, rerouted and/or repaired.

VEHICLES INVOLVED:

Involved are some early 1986 Buick Century & Olds. Ciera models equipped with RPO LG3 3.8L engines within the following vehicle parameters:

PLANT MAKE MODEL FROM THROUGH ----- ---- ----- ---- ------- Doraville Buick 'A' SOP GD413526 Oklahoma City Buick 'A' SOP C6406611

Tarrytown Buick 'A' SOP GT408800 Doraville Olds '' SOP GD319391 Oshawa Olds 'A' G9307536 G9307580 G9307645 G9307693 G9307743 C9307800

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 RESPONIBILITY:

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.

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 be sure 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 modification according to instructions contained in this bulletin.

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. The listings provided are for campaign activity only and should not be used for any other purpose.

PARTS INFORMATION:

When required, material used in making repairs to the ECM wiring harness, such as tape, wire or wire connectors are to be obtained from the Dealership parts department.

PARTS AND LABOUR CLAIM INFORMATION:

Credit for the campaign work performed will be paid upon receipt of a properly completed campaign claim card or RAPID terminal transmission in accordance with the following:

Repair Code Operation Time Allowance ----------- --------- --------------- 2A Inspect, reroute ECM wiring .6 harness (non-Air Conditioned models)

3A Inspect, reroute ECM wiring .7 harness (Air Conditioned models) 4A Inspect, reroute and repair ECM 1.1 Wiring Harness. Vehicle does not have air conditioning.

5A Inspect, reroute and repair ECM 1.2 wiring Harness. Vehicle equipped with air conditioning.

Time allowance includes 0.1 hour for Dealer administrative detail associated with this campaign. A material allowance of $2.75 will be included for repair code 4A and 5A.

SERVICE PROCEDURE

1. Open hood and disconnect the negative battery cable.

2. Raise the vehicle on a hoist.

3. Remove the right front wheal assembly.

4. Disconnect the engine harness from the starter solenoid.

5. Disconnect the A/C high pressure cutoff switch, A/C compressor clutch, and A/C head pressure switch connectors.

6. Pull the wiring harness back towards the dash panel. Reroute it over and outboard of the power steering pipe assembly as shown in the illustration.

7. Inspect the engine harness for melted areas near the main harness breakout. Repair as necessary.

8. Reinstall the wiring harness under the engine.

9. Reconnect the starter solenoid and A/C compressor connections.

10. Reinstall the wheel assembly.

11. Lower the vehicle.

12. Disconnect the fuel injector harness connector and the computer controlled coil ignition module connector.

13. Reroute the harness outboard of the heater hoses an shown in the illustration.

14. Reconnect the fuel injector and coil ignition module connectors.

15. Reconnect the negative battery cable.

16. Install 'Campaign Identification Label' according to instructions contained in this bulletin. Close hood.

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.

Dear General Motors CusWmer:

General Motors of Canada has detemined that some early 1986 Buick Century & Olds Ciera models equipped with RPO LG3 3.8L engines may have been assembled with the engine "Electronic Control Module" (ECM) wiring harness misrouted. This may result in the wiring harness shorting against the exhaust manifold in the engine compartment.

To prevent this condition from occurring on your vehicle, your Dealer will inspect and when required, reroute or repair the ECM wiring harness. This service will be performed for you at no charge.

Instructions for this service have been sent to your GM Dealer. Please contact your Dealer to arrange a service date. The labour time to inspect your vehicle is approximately 15 minutes. If the wiring harness must be rerouted or repaired, it will take an additional 45 minutes. Please ask your Dealer if you wish to know how much additional time will be needed to process your vehicle.

This letter identifies your vehicle. Presentation of this letter to your Dealer will assist their Service personnel in completing the necessary correction to your vehicle in the shortest possible time.

Further assistance, if required, may be obtained from the General Motors Zone Office nearest you. Your vehicle Owner's Manual provides the location and phone number of each respective Zone Office.

We are sorry to cause you this inconvenience; however, we have taken the action in the interest of your continued satisfaction with our products. Your prompt cooperation would be appreciated.

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.