WINDSHIELD WIPER CHATTER AND WIPEABILITY SERVICE PROCEDURE

SUBJECT: WINDSHIELD WIPER BLADE CHATTER/WIPEABILITY CONCERNS CAUSED BY CHANGE IN BLADE ANGLE

MODELS AFFECTED: 1982-89 SKYHAWKS

Some 1982-89 Skyhawk coupes may experience driver side blade chatter and wipeability concerns.

IMPORTANT: Before doing any work, clean windshield and both blades with GM windshield cleaner, PN 1050011 or equivalent. Then, recheck wiper-washer operation. If problems persist after cleaning, follow the procedures in this bulletin.

CAUSE:

------- Some vehicles have a wiper housing mounting tolerance condition that changes the attack angle of the driver side blade assembly and can cause blade chatter and wipe problems.

CORRECTION:

------------ Install spacer, Package #22111290, over driver side linkage housing (Figure 1). Make sure spacer is correctly oriented. Parts are currently available at GMSPO.

Install new screws provided finger tight, then torque evenly to 8 N.m (70 lbs.in).

NOTE: When reassembling cowl, make sure that washer hose is reconnected (and not pinched).

If an interference condition results between the wiper arm head casting and the cowl clearance hole, use a file to enlarge hole at interference point.

WARRANTY INFORMATION:

Labor Operation Number: T4677 Labor Time: 0.4 hour Trouble Code: 92

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.