SERVICE MANUAL UPDATE ELECT. ANTILOCK BRAKE SYSTEM

SUBJECT: ELECTRICAL SYSTEMS MANUAL UPDATE, ANTILOCK BRAKE SYSTEM (REVISED VALVE CONTROL TEST)

VEHICLES AFFECTED: 1991 "C" MODELS

The 1991 Electrical Systems Manual, Antilock Brake System, page 99, C: VALVE CONTROL TEST was printed with an incorrect terminal number.

The following updated illustration C: VALVE CONTROL TEST, should be used for correct diagnostic procedures:

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.