CAMPAIGN: TEMPERATURE SWITCH 1988-89 CORSICA. Chevrolet Corsica 1988

For 1990-2009 cars

# CAMPAIGN: TEMPERATURE SWITCH 1988-89 CORSICA

#### Models: 1988-89 Chevrolet Corsica and Pontiac Tempest Equipped with 2.0L (RPO LL8, VIN Code 1) Engine and Base Instrument Cluster

General Motors of Canada has determined that certain 1988-89 Chevrolet Corsica and Pontiac Tempest vehicles equipped with 2.0L (RPO LL8) engine and base instrument cluster have been produced with an incorrectly wired engine coolant temperature switch. As a result of the incorrect wiring, the coolant temperature warning light will illuminate briefly during engine starting as a check that the bulb and its circuit are working, but the bulb will not illuminate during an overheat condition.

To correct this condition, dealers are to reindex the temperature switch connector wiring according to instructions contained in this bulletin.

#### VEHICLES INVOLVED:

Involved are certain 1988-89 Chevrolet Corsica and Pontiac Tempest model vehicles equipped with 2.0L (RPO LL8) engine and base instrument cluster and produced within the following VIN breakpoints:

#### MODEL YEAR PLANT FROM THROUGH ---------- ----- ---- ------- 1988 Corsica Linden SOP JE678000

1988 Corsica Wilmington SOP JY913429

1989 Corsica Linden SOP KE183363

1989 Corsica Wilmington SOP KY180921

1988 Tempest Wilmington SOP EOP

1989 Tempest Wilmington SOP KY707545

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:

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:

No parts are required for this campaign.

#### PARTS AND LABOUR CLAIM INFORMATION:

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

Repair Code Description Time Allowance ----------- ------------ --------------- 2A Reindex Temperature .3 Switch Wiring

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 negative battery cable.

2. Remove connector from coolant temperature switch (see illustration for switch location). Note that the switch is below the ECM Coolant Temperature Sensor.

3. Remove terminals from both sides of connector. Reinstall terminals into opposite cavities of connector, making sure the terminals are properly locked in connector. The green wire should now be in cavity "B."

4. Reinstall connector onto temperature switch.

5. Reconnect negative battery cable.

6. 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.

Dear General Motors Customer:

General Motors of Canada has determined that certain 1988-89 Chevrolet Corsica and Pontiac Tempest vehicles equipped with 2.0L (RPO LL8) engine and base instrument cluster have been produced with an incorrectly wired engine coolant temperature switch. As a result of the incorrect wiring, the coolant temperature warning light will illuminate briefly during engine starting as a check that the bulb and its circuit are working, but the bulb will not illuminate during an overheat condition.

To correct this condition, your dealer will rewire the temperature switch so that it operates correctly. This service will be performed for you at no charge.

Please contact your GM dealer as soon as possible to arrange a service date. Instructions for making this correction have been sent to your dealer. Please ask your dealer if you wish to know how much time will be needed to schedule and process your vehicle. The labour time necessary to perform the service is approximately fifteen (15) minutes.

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 this action in the interest of your continued satisfaction with our products.

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.