CAMPAIGN: HEAD LAMP SWITCH. Buick LeSabre 1994

SUBJECT: HEAD LAMP SWITCH

Models: 1994 Oldsmobile Eighty Eight

TO: ALL GENERAL MOTORS DEALERS

General Motors of Canada Limited has determined that a defect which relates to motor vehicle safety exists in certain 1994 Oldsmobile Eighty Eight model vehicles. A spring in the head lamp portion of the head/park lamp switch may fail and prevent latching of the head lamp portion of the switch in the "ON" position. If this were to occur, the head lamps would not stay illuminated, but the twilight sentinel and the park lamp portion of the switch would still function as intended. A potential also exists that the spring could fail while the head lamps are "ON" and cause loss of head lamp lighting. Sudden loss of the head lamp lighting under severe weather or night time driving conditions could reduce driver visibility, which might result in a vehicle crash without prior warning.

To prevent the possibility of this condition from occurring, dealers are to inspect head/park lamp switch build date codes and replace switches with suspect build date codes.

VEHICLES INVOLVED:

Certain 1994 Oldsmobile Eighty Eight vehicles within the breakpoints listed below:

Year Model Plant Code From Through ---- ------ ----------- ---- ------- 1994 Eighty Eight H RH352207 RH353594

NOTE: PLEASE CHECK DCS SCREEN 45 OR YOUR V.I.N. LISTING BEFORE PERFORMING CAMPAIGN TO ENSURE THAT THE VEHICLE IS AFFECTED. ONLY AFFECTED VIN'S WILL BE PAID.

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 INFORMATION:

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

Part Number Description Quantity/Vehicle ----------- ----------- ---------------- 25608444 Head/Park Lamp Switch 1 as required

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 Code Description Time Allowance ----------- ----------- -------------- 1A Inspect For Date Code On Head/Park Lamp Switch .3

2A Inspect For Date Code On Head/Park Lamp Switch .3 And Replace Switch

Time allowance includes 0.1 hour for dealer administrative detail associated with this campaign. Parts credit will be based on dealer net plus 40% to cover parts handling.

SERVICE PROCEDURE:

INSPECTION

1. Write down the owner's preset memory settings, which will be lost when the battery is disconnected, for reference later when resetting the memory functions. If a memory retention device is plugged into the cigarette lighter socket (such as "Memor-Eze," Snap-On Tool YA960, or Kent Moore Tools KS295A or B19027), this step can be omitted. Then, with the ignition in the "off" position, disconnect the negative battery cable.

2. Carefully pry one side of the head/park lamp switch outward from trim plate using a. 5mm (0.02 in.) thick plastic card 55mm (2.1 in.) wide (approximate size of credit card). Use care not to damage trim plate.

3. Pull switch out far enough to read switch build date code on side of plastic switch body. Build date code is stamped in blue on body and is a four (4) digit number below the eight (8) digit production part number.

0 If build date code is 4166 up to and including 4174, switch must be replaced. Proceed to step 4.

0 If build date code is 4165 or lower or 4175 or higher, switch does not need to be replaced. Carefully reset switch and proceed to step 7.

REPLACEMENT

4. To replace switch, pull switch out far enough to disengage connector.

5. Connect new switch to connector and carefully reset switch in trim plate.

6. Check new switch for proper operation.

7. Reconnect the negative battery cable. If a memory retention device was not used, reset (to the extent possible) all devices that lost their memory after the battery was disconnected.

8. Install a 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:

To prevent the possibility of this condition from occurring, your dealer will inspect the head/park lamp switch build date codes and replace switches with suspect build date codes.

This service will be provided for you at no charge.

Please contact your GM dealer as soon as possible to arrange a service date.

If parts are required, ask your dealer for details regarding their availability. If parts are not in stock, they can be ordered before scheduling your service date.

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.

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

Customer Support Department General Motors of Canada Limited

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.