For 1990-2009 cars

# BRAKE LINING PULL AHEAD JM4 AND JL9 BRAKE SYSTEMS

#### MODELS/YEARS 1986-89 NINETY-EIGHT AND EIGHTY-EIGHT MODELS

A new brake lining material was used in the 1989 Ninety-Eight and Eighty-Eight models equipped with Teves Antilock Brake System. This new material reduces 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 was installed in 1989 Ninety-Eight and Eighty-Eight models equipped with Teves Antilock Brake System (ABS) beginning with the following VIN numbers:

Plant Ninety-Eight Eighty-Eight ----- ------------ ------------ Buick City KH302775 Orion K4332788 Wentzville K1353313 K1820662 Willow Run KW310497

Beginning with 1990 production, the brake apply system on Ninety-Eight and Eighty-Eight 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 12321453 (Edge Code DM 342 EE) to service 1986-1989 Ninety-Eight and Eighty-Eight 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 through 1989 Ninety-Eight and Eighty-Eight models with Antilock Brake System (ABS)

- 1990 Ninety-Eight and Eighty-Eight models with base brakes or with Antilock Brake System (ABS).

Parts are currently available from GMSPO.

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.