DETONATION/COLD IDLE STABILITY RELEASE OF NEW PROM

On vehicles with build date codes prior to 7-126599 or J-138165, improvement of the conditions listed below can be gained by installation of the service PROM detailed in the illustration below.

The conditions improved with this serivce PROM include:

Engine detonation Cracked throttle driveabilitv 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.