ENGINE SURGE IN 3RD GEAR NEW PROM PART NUMBERS

MODEL AND YEAR: 1985 AND 1986 CAVALIER WITH 2.8L (VIN CODE W) MPFI ENGINES AND 3-SPEED AUTOMATICS

Some Cavaliers may experience an engine surge condition in the 32 to 40 mph range, in third gear, under steady throttle, with the torque converter clutch (TCC) applied.

To correct this condition replace the PROM with one of the following PROMs:

Model Application Year Sales A/C Prom P/N ----------- ----- ----- --- --------- "J" Car 1985 Federal Yes 1228114 2.8L MPFI 1985 Federal No 1228115 3 Speed Automatic 1985 California Yes 1228116 1985 California No 1228117

1986 Federal Yes 1228118 1986 Federal No 1228119

1986 California Yes 1228120 1986 California Yes 1228121

NOTICE: These PROMs contain a revised TCC engagement schedule that raises TCC engagement to 45 mph and disengagment to 42 mph.

Use applicable Labor Time and Operation Number.

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.