BRAKE LINING PULL AHEAD JM4 AND JL9 BRAKE SYSTEMS

VEHICLES AFFECTED: 1986-1990 C AND H CARS WITH JM4 TEVES ANTILOCK BRAKE SYSTEM (ABS)

A new brake lining material is being used in the 1989 C and H models equipped with Teves Antilock Brake System. This new material will reduce the potential for brake squeal, but has a reduced coefficient of friction and should NOT be installed on 1986-89 vehicles equipped with base brakes.

This new lining material is being installed in 1989 C and H models equipped with Teves Antilock Brake System (ABS) beginning with the following VIN numbers:

PLANT VIN

Buick Buick City 498346 Buick Wentzville 664556 Cadillac Orion 332788 Pontiac Willow Run 287123

Oldsmobile Buick City KH302775 (H Car) Oldsmobile Orion K4332788 (C Car) Oldsmobile Wentzville K1353313 (C Car) Oldsmobile Wentzville kl820662 (H Car) Oldmobile Willow Run KW310497 (H Car)

Beginning with 1990 production, the brake apply system on C and H models equipped with base brakes will be modified to provide more assist, and will be equipped with the new brake pads.

Notice:

DO NOT use brake pad part number 18017208 (Edge Code DM 342 EE) to service 1986-1989 C and H models unless they are equipped with anti-lock brakes (ABS). These pads have a lower coefficient of friction than the pads used on vehicles equipped with base brakes, and could result in increased pedal effort requirements if installed in 1986-89 vehicles with base brakes.

This new lining material may be used to service the following vehicles:

- 1986 thru 1989 C and H models with Antilock Brake System (ABS)

- 1990 C and H models with base brakes or with Antilock Brake System (ABS).

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.