CAMPAIGN: BRAKE STOP LAMP SWITCH (NEW PART RELEASED)

SUBJECT: BRAKE STOPLAMP SWITCH

MODELS: 1990 Chevrolet Lumina, 1989-90 Oldsmobile Cutlass Supreme, 1988-90 Pontiac Grand Prix 1989-90 Buick Regal

TO: ALL GENERAL MOTORS DEALERS

------------------------------ THIS BULLETIN REVISES THE VEHICLES INVOLVED SECTION OF PRODUCT SAFETY CAMPAIGN BULLETIN 0A37 DATED DECEMBER, 1990. SPECIFICALLY. 1988 AND ADDITIONAL 1989 PONTIAC GRAND PRIX VEHICLES HAVE BEEN ADDED TO THE CAMPAIGN POPULATION. OWNERS WILL BE NOTIFIED OF THIS ACTION BY GENERAL MOTORS (SEE ATTACHED OWNER LETTER). ADDITIONS HAVE BEEN INDICATED WITH AN *. THIS SUPPLEMENT IS TO BE ATTACHED TO PRODUCT SAFETY CAMPAIGN BULLETIN 0A37 FOR FUTURE REFERENCE.

IMPORTANT

THE VIN LISTING FOR CAMPAIGN 0A37A WILL FOLLOW WHEN A SUFFICIENT QUANTITY OF PARTS IS AVAILABLE (OCTOBER 1992-TENTATIVE).

FOR YOUR INFORMATION: OWNER NOTIFICATION WILL BE DONE FIVE (5) WORKING DAYS AFTER THE DEALER LISTING IS MAILED TO THE DEALERS.

VEHICLES INVOLVED:

Involved are certain 1990 Chevrolet Lumina, 1988-89 Pontiac Grand Prix, 1989-90 Oldsmobile Cutlass Supreme, and 1989-90 Buick Regal model vehicles built within the following VIN breakpoints:

Year Model Plant Plant Code From Through ---- ----- ----- ---------- ---- ------- 1990 Chevrolet Lumina Oshawa "9" L9100203 L9221197 1990 Chevrolet Lumina Oshawa "1" L1100001 L1176453 *1988 Pontiac Grand Prix Fairfax "F" SOP EOP *1989 Pontiac Grand Prix Fairfax "F" SOP KF259509 1989 Pontiac Grand Prix Fairfax "F" KF259510 KF336823 1990 Pontiac Grand Prix Fairfax "F" LF200001 LF256087 1989 Oldsmobile Cutlass Supreme Doraville "D" KD348608 KD440028 1990 Oldsmobile Cutlass Supreme Doraville "D" LD300001 LD364434 1989 Buick Regal Oshawa "1" K1445106 K1488782 1990 Buick Regal Oshawa "1" L1400001 L1431378

Vehicles which Oshawa records indicate were previously repaired under warranty with stoplamp switch P/N 10180504 are not included in this campaign.

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.

COPY OF LETTER TO OWNERS

VEHICLE RECALL NOTICE General Motors of Canada Limited Oshawa, Ontario L1G 1K7

September 1992

Dear General Motors Customer:

General Motors of Canada Limited has determined that a defect which relates to motor vehicle safety exists in certain 1988-89 Pontiac Grand Prix model vehicles. These vehicles may have a faulty brake stoplamp switch which could result in the stoplamps not illuminating on application of the brakes. If this should occur in situations where a driver in a trailing vehicle is otherwise unable to recognize a braking action in sufficient time to respond appropriately, a vehicle crash could occur without prior warning. In some cases, failure of the stoplamp switch can result in the stoplamps staying on at all times.

In addition, in vehicles equipped with cruise control, a faulty stoplamp switch can result in resumption of the cruise control feature upon release of the brake pedal. If this occurs, the cruise control feature can be disengaged by moving the cruise control switch to the "OFF" position, or by reapplying the brake. Once the vehicle speed drops below 19-22 km, the cruise feature will be automatically disengaged.

To prevent these conditions from occurring, an improved design stoplamp switch will be installed on your vehicle. This service will be performed 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

0A37a

JL:il

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.