For 1990-2009 cars

# TANDEM DIAPHRAGM POWER BRAKE BOOSTER ASSEMBLY

#### VEHICLES AFFECTED: 1986 Models

The tandem power brake booster assembly used on 1986 models contains several new style components. See Figure.

Please reference Figure when performing tandem diaphram power brake booster repairs until receipt of the 1986 chassis service manual.

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.