INADEQUATE WINDSHIELD DEFROST (INSTALL REVISED GRILL)

SUBJECT: INADEQUATE WINDSHIELD DEFROSTER PERFORMANCE (INSTALL REVISED GRILLE)

MODELS AFFECTED: 1991-92 ROADMASTERS

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 revised defroster grille went into production in vehicles 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 color.

EQUIPPED WITH C60

Part Number Color ----------- ----- 17990142 Camel 17990143 Red Maple 17990144 Sapphire 17990379 Gray

EQUIPPED WITH C68

17990145 Camel 17990146 Red Maple 17990147 Sapphire 17990381 Gray

Parts are currently available from GMSPO.

WARRANTY INFORMATION:

Labor Operation Number: D1406 Labor Time: 0.2 Hour

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.