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Wiper and Washer Systems > Wiper Blade > Component Information > Technical Service Bulletins > Customer Interest: > 918D39 > Dec > 90 > Wiper Blades - Chattering and Poor Wipeability

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Wiper Blade: Customer Interest
Wiper Blades - Chattering and Poor Wipeability

GMC NUMBER:

91-8D-39

GROUP:

8D Windshield Wiper/Washer System

DATE:

December, 1990

CORPORATE
NUMBER:

031066

SUBJECT:

CHATTERING WIPER BLADES OR BLADE WIPEABILITY

MODELS:

1991 AND PRIOR YEARS, LIGHT AND MEDIUM DUTY TRUCKS

CONDITION:
Chattering and poor wipeability comments may be due to the windshield glass and/or wiper blades becoming contaminated by insect residue, dirt, road
grime, carwax etc.

CORRECTION:

1.

Clean the windshield glass with GM # 1050011 (Bon Ami) glass cleaner or equivalent.

Important

The glass is clean when rinse water does not "bead-up", but "sheets" across the entire glass surface. Multiple cleanings may be required to remove all
contaminants.

2.

Clean the wiper blades by using a cloth that has been saturated with full strength washer solution and wipe vigorously. Rinse the blades with water
after cleaning.

Wiper and Washer Systems > Wiper Blade > Component Information > Technical Service Bulletins > Customer Interest: > 918D39 > Dec > 90 > Wiper Blades - Chattering and Poor Wipeability

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