POOR DRIVEABILITY (NEW PROM TO INCREASE TCC ENGAGEMENT SPEED)

REVISED CALIBRATION PROM FOR IMPROVED DRIVEABILITY

Model and Year: 1985 CORVETTE WITH AUTOMATIC TRANSMISSION --------------

TO: ALL CHEVROLET DEALERS

A revised calibration PROM has been released which is intended to improve driveability on 1985 Corvettes with Automatic transmission.

This PROM contains changes to improve tip in response when accellerating and also raises torque converter clutch engagement speeds to 41 MPH.

This PROM P/N is 1227805.

Use applicable labor operation number and labor time.

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.