ELECTRO STATIC DISCHARGE CAUSE FAILURE TO SUNROOF MODULE

MODELS AFFECTED: 1990 BUICK PARK AVENUE AND ULTRA

An electrostatic discharge from a vehicle occupant to the 1990 Buick Park Avenue and Ultra sunroof switch could damage the express open sunroof module. As a result, the sunroof would operate in the open direction only.

To eliminate the potential problem, the chrome sunroof switch button is being changed to plastic. This change took place on 10/31/89.

Servicing a vehicle which has experienced this failure mode requires replacing the chrome button switch (Buick and Oldsmobile part number 20396960; Cadillac part number 20060925) with a new plastic button sunroof switch (Buick and Oldsmobile part number 20429984; Cadillac part number 20436618) and replacing the damaged express sunroof module (Buick, Oldsmobile and Cadillac part number 12503328).

Parts are expected to be available on January 22, 1990. Until then normal part orders will not be accepted by GMSPO. Only verifiable emergency VIP orders will be accepted. SPO will make every effort to obtain parts. All parts will be placed on 400 control to waive VIP surcharges. However, the part will be shipped premium transportation at dealer's expense. All other order types will be canceled as incorrectly ordered while the 400 control is in place.

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.