For 1990-2009 cars

# ELECTRO STATIC DISCHARGE CAUSE FAILURE TO SUNROOF MODULE

#### MODELS/YEARS 1990 NINETY-EIGHT MODELS

An electrostatic discharge from a vehicle occupant to the 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 (part number 20396960) with a new plastic button sunroof switch (part number 20429984) and replacing the damaged express sunroof module (part number 12503328).

Parts are currently available from GMSPO.

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.