POOR COLD DRIVEABILITY NEW PROM INFORMATION

Models Affected: 1983 Skylark With 2.5L EFI (LR8) Engine Equipped with 4-speed Manual Transaxle National

Some early 1983 Skylark model vehicles equipped with the 2.5L engine (VIN Code R) and 4-speed manual transaxle may exhibit a rolling unstable idle, tip-in hesitation or stumble while being driven when cold. If this condition occurs, a new prom has been released for service correction.

Original Prom New Prom

Part No. 1226348 Part No. 1226480 Broadcast Code AXN Broadcast Code CHX

When the new prom is installed, the broadcast code on the paper label affixed to the ECM should be updated in order to reflect this prom change.

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.