COLD ENGINE SPEED SAG W/ A/T ENGAGEMENT-PROM P/N PROVIDED

MODELS AFFECTED: 1985 CENTURYS AND SCMERSET REGALS EQUIPPED WITH AUTOMATIC TRANSMISSION AND 2.5L ENGINES (VIN CODES R AND U)

Some 1985 Centurys and Somerset Regals equipped with the 2.5L engines and automatic transmissions may exhibit a sag in engine speed upon gear engagement after a cold start. Should such a condition be encountered that cannot be repaired by published service procedures, a new PROM may be installed (parts listed below).

Model Part Number ------ ------------ Century (2.39 axle ratio) 16051305 Century (2.84 axle ratio) 16051314 Somerset Regal 16051333

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.