TCC HUNTING 125C TRANSMISSION NEW PROM INFORMATION

Models Affected: 1983 Skylarks & Centurys Equipped with 2.5L L-4 Engine (VIN Code R) and ECM 1226100

Some comments on TCC hunting particularly when operating with the cruise control engaged, have been received on some of the above mentioned vehicles.

To correct this condition, two new PROMS have been released to assist in TCC engagement. To determine that the vehicle has a 2 board 1226100 ECM inspection of the certification label on the drivers door provides the build date of the vehicle, vehicles built prior to April 1983 have the two board ECM. Vehicles after that date have single board ECM'S.

The below listed PROMS are not to be used in single board ECM's.

PROM BROADCAST CODE REPLACES BROADCAST CODE AXLE RATIC

1226647 CCY 1226439 CCY 2.84 1226648 CDL 1226441 CDL 2.39

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.