ELECTRICAL SYSTEMS MANUAL UPDATE(GENERATOR INPUT TEST)

SUBJECT: ELECTRICAL SYSTEMS MANUAL UPDATE-SECTION POWERTRAIN- STARTING AND CHARGING REVISED, GENERATOR INPUT TEST D

VEHICLES AFFECTED: 1991 C MODELS

The following procedure D, Generator Input Test, Page 51, has been updated for testing the generator on vehicles equipped with Gauge Cluster (UB3) for correct diagnosis.

Please update your respective Electrical Systems Manuals accordingly.

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.