BRAKE LINING PULL AHEAD JM4 AND JL9 BRAKE SYSTEMS

Models Affected: 1989 BONNEVILLE

The 1990 Bonneville front lining material, edge code DM 342EE, has been pulled ahead on the 1989 Bonneville models with ABS Brake Systems only. The purpose of the pullahead is to reduce the potential for brake squeal on 1989 vehicles with ABS brake systems.

It is recommended that the 1990 lining, edge code DM 342 EE, not be used to service 1989 and prior years Bonneville models without ABS Brake Systems; i.e., vehicles with base brake systems. The 1990 lining, DM 342 EE, has a lower coefficient of friction than the current o.e. and service lining Edge Code DM 127 EE, and should only be used to service 1989 vehicles with ABS and 1990 Bonneville models with both base and ABS brake systems.

Vehicles produced at the following assembly plants PRIOR to VIN numbers equipped with both JM4 and JL9 should use lining 12321422.

PLANT VIN

Pontiac Willow Run 287123

Vehicles produced at the following assembly plants AFTER VIN numbers equipped with both JM4 and JL9 should use lining 12321453.

PLANT VIN

Pontiac Willow Run 287123

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.