CODE 41 IGNITION TIMING ADJUST

WHEN SETTING IGNITION TIMING ACCORDING TO THE VEHICLE EMISSION CONTROL INFORMATION LABEL AND USING THE AVERAGING METHOD AS DESCRIBED IN SECTIONS 6D AND 6E OF THE 1982 CAVALIER SHOP MANUAL, THE "CHECK ENGINE" LIGHT WILL ILLUMINATE TO SET TROUBLE CODE 41 IN STORED MEMORY. AFTER FOUR WIRE CONNECTOR IS RECONNECTED AND ADJUSTMENT IS COMPLETED, REMOVE THE ECM 1 FUSE TO CLEAR THE TROUBLE CODE MEMORY.

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.