INADEQUATE WINDSHIELD DEFROST (INSTALL REVISED GRILL)

SUBJECT: INADEQUATE WINDSHIELD DEFROSTER PERFORMANCE (INSTALL REVISED GRILLE)

VEHICLES AFFECTED: 1991 - 1992 B-CAR

Condition:

---------- Inadequate windshield defroster performance.

Cause:

------- Inadequate air flow to the base of the windshield.

Correction:

----------- Install revised defroster grille.

Information and Part Numbers:

The clean VIN breakpoint should be any vehicle built on or after May 6, 1991. However, some vehicles built before this date may have the revised defroster grille. The revised grille may be identified by the vertical vanes measuring 12 mm (15/32") in height versus 5 mm (9/32") on the older grille.

The build date is located on a label on the rear of the left hand door.

The following is a list of the revised Defroster Grille Assembly part numbers by usage and colour.

CHEVROLET ================ Part Number Colour ------------- ------------------ 10128802 Sapphire V/Dark 10128803 Camel Dark 10128804 Red Maple Dark 10128805 Gray Dark

BUICK AND OLDSMOBILE WITH C60 ============================== Part Number Colour ----------- ----------------- 17990142 Camel Dark 17990143 Red Maple Dark 17990144 Sapphire V/Dark 17990379 Gray Dark

BUICK AND OLDSMOBILE WITH C68 ============================== Part Number Colour ----------- ----------------- 17990145 Camel Dark 17990146 Red Maple Dark 17990147 Sapphire V/Dark 17990381 Gray Dark

Use the most applicable Labour Operation and Time from the Canadian Labour Time Guide.

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.