ENGINE SURGE MAY NEED SERVICE PROM

VEHICLES AFFECTED: 1985-86 'A' CAR WITH 2.8L ENGINE (VIN"X"), U.S. FEDERAL EMISSIONS AND 4 SPD. AUTOMATIC TRANSMISSION

Customer driveability comments of engine surge may occur on some 1985/86 'A' cars equipped with the 2.8L V6 carbureted engine. if normal service orocedures in Service Manual (Section 6EI, Section B - surges and/or chuggle) do not carrect the conditions, a new service PROM with a revised calibration is now available.

The model applications are:

MODEL EMISSIONS SERVICE YEAR MODELS TRANSMISSION CALIBRATION PROM ---- ------ ------------ ----------- ----

1985/86 1,2,3,4 AAOO 4 Spd. Auto. Federal 1228327

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.