WINDSHIELD WIPER BLADE CHATTER (REVISED BLADE AND INSERT). Pontiac Sunbird 1991

For 1990-2009 cars

# WINDSHIELD WIPER BLADE CHATTER (REVISED BLADE AND INSERT)

#### Subject: WINDSHIELD WIPER BLADE CHATTER (REVISED BLADE AND INSERT)

#### Models Affected: 1988-91 SUNBIRD MODELS

This bulletin cancels and replaces bulletin 91-10-30 issued 7191. Please discard bulletin 91-10-30. This bulletin is being revised to correct the VIN breakpoints.

#### IMPORTANT: Before replacing any part, clean windshield and both blades with GM windshield cleaner, P/N 1050011 or equivalent. The glass is clean when rinse water does not "bead-up" across entire glass surface. Multiple cleaning may be required to remove all contaminants. Also, clean the wiper blades by using a cloth that has been saturated with full strength washer solution by wiping vigorously. Rinse the blades with clean water after cleaning.

Condition: Some 1988-1991 Sunbird models built prior to the VIN Breakpoint M7566731 may exhibit windshield wiper chatter or reduced wipeability at road speeds. A revised graphite impregnated wiper blade insert was used in production to improve wiper performance.

Correction: Install revised insert. Carefully inspect blade assembly for bent or damaged conditions. Install revised wiper blade assembly if any damage is found.

P/N 22121047 Insert Wiper Blade P/N 5049926 Blade, Assembly With Insert

Parts are currently available from GMSPO.

Labor Operation Number: T1746 Labor Time: 0.3 Hours

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.