STALL, SAGS, HESITATION PROM REPLACEMENT

VEHICLES AFFECTED: 1987 "A" CARS WITH LR8 2.5L ENGINE (VIN CODE R)MD9 AUTOMATIC TRANSMISSION, AND F17, 2.84 TRANSAXLE

Some 1987 'A' cars equipped with 2.5L LR8 engines, automatic transmissions, and 2.84 transaxle may exhibit driveability concerns such as idle shake, sag on a tip-in maneuver from a standing start, when engine is at operating temperature, and a stall on the same light tip in maneuver if done immediately after a cold start at ambient temperatures 80 degrees to 85 degrees Fahrenheit.

After routine shop manual diagnostic procedures have been tried and the customer comments have not been resolved, a new service PROM should be installed. The service PROM part numbers and applications are as follows:

SERVICE PROM APPLICATION

P/N 16072828 Chevrolet and Pontiac LR8-MD9-FI7

P/N 16072835 Oldsmobile and Buick LR8-MD9-Fl7

Use applicable labor time for PROM replacement.

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.