LATE PRODUCTION USING ESC SPARK KNOCK AND/OR CODE 43

LATE PRODUCTION 1983 G AND B SERIES WITH A 3.8L V-6 ENGINE ARE EQUIPPED WITH ESC (ELECTRICAL SPARK CONTROL). THE ESC CONTROLLER IS LOCATED ON TOP OF THE RIGHT WHEEL HOUSE PANEL. AN INOPERATIVE ESC CONTROLLER MAY CAUSE ENGINE SPARK KNOCK AND/OR A CODE 43. EARLY PRODUCTION 1983 MODELS WERE NOT PRODUCED WITH ESC...

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.