CENTER HIGH MOUNTED STOP LAMP NEW SHIELD AND SEAL ASSY.

VEHICLES AFFECTED: 1990 CHEV/OLDS/PONT 'W' CAR

THIS BULLETIN CANCELS AND REPLACES BULLETIN 90-2-100, dated 10/05/89 TO PROVIDE NEW PART NUMBERS FOR THE FOLLOWING VEHICLES.

1990 Chevrolet W-Car (Coupe and Sedan)

1990 Pontiac and Oldsmobile W Sedan

CONDITION: Owners of some 1990 W-cars (see models affected) may comment on a white powder type substance on the rubber seal of the Centre High Mounted Stop Lamp (CHMSL).

CAUSE: The substance is a bleed-out of sulphur used in the processing of the rubber.

CORRECTION: Replace the shield and seal assembly with a new one. New part numbers are listed below.

IMPORTANT: When installing new shield and seal assembly be sure rubber seal does not contact back glass grid defogger lines.

CHEVROLET

10168306 - 1WM27 - 20I - Very Dk. Sapphire 10168307 - 1WM27 - 66I - Med. Beechwood/Dk. Sienna 10168308 - 1WM27 - 78I - Garnet Red 10168309 - 1WM27 - 15I - Med. Slate Gray/Dk. Slate Gray 10168312 - 1WM69 - 20I - Very Dk. Sapphire 10168313 - 1WM69 - 66I - Med. Beechwood/DK. Sienna 10168314 - 1WM69 - 78I - Garnet Red 10168315 - 1WM69 - 15I - Med. Slate Gray/Dk. Slate Gray

PONTIAC

10168318 - 2WM19 - 20I - Very Dark Sapphire 10168319 - 2WM19 - 66I - Med. Beechwood/Dk. Sienna 10168320 - 2WM19 - 78I - Garnet Red 10168321 - 2WM19 - 15I - Med. Slate Gray/Dk. Slate Gray

OLDSMOBILE

10168324 - 3WM69 - 20I - Very dark Sapphire 10168325 - 3WM69 - 66I - Med. Beechwood/Dk. Sienna 10168326 - 3WM69 - 78I - Garnet Red 10168327 - 3WM69 - 15I - Med. Slate Gray/Dk. Slate Gray

Use 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.