LIGHT THROTTLE DETONATION NEW PROM MAY REPAIR-P/N

Model and Year: 1985-86 CAVALIER WITH L-4 (VIN CODE P) ENGINE AND AUTOMATIC TRANSMISSION

Customer comments of detonation under light-to-medium throttle operation may be resolved with one of the following service PROMs. This calibration will service both 1985 and 1986 automatic vehicles.

Service PROM

Federal Emission Package P/N 16122999 California Emission Package P/N 16123000

The service manual (Section 6E on "Detonation/Spark Knock") should be referred to for other causes of detonation.

Use applicable labor operation and time.

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.