DETONATION/COLD IDLE STABILITY RELEASE OF NEW PROM

MODELS AFFECTED: 1983 SKYHAWK WITH 2.0L L4 ENGINE (CODE P)

On some 1983 Skyhawks with 2.0L L4 engines, improvement of the conditions listed below can be gained by installation of the service PROM detailed in the information below.

The conditions improved with this service PROM include:

Engine detonation Cracked throttle driveability Cold idle stability

Vehicle Configuration ECM P/N Service PROM

Federal 16029801 All M5 16023561 1226473 M4 W/A/C 16033061

Federal 16033051 1226474 M4 W/O A/C

Federal 16027111 All A3 16032261 1226471

California 16027071 1226477 All M4 & M5

California 16027101 1226475 All A3

Use applicable labor operation.

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.