Skyhawk L4-121 2.0L Turbo VIN M FI (1987)
Wiper Blade: Customer Interest
Wipers - Blade Chatter
Bulletin 89-10-37
Date Mar. '91
Ref. No. 89-296-10
Corp. Ref. No. 078308
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.
