HOT DRIVEABILITY IMPROVEMENTS PROM UPDATE

Some 1982 Chevettes may experience hot tip-in hesitation. If this condition is encountered, the following changes are recommended:

(1) On vehicles with manual transmission (MY1) and Federal (NA5) or altitude emissions (NA6), set initial timing at 8 DEG BTDC. In addition, install new PROM, P/N 1226080.

(2) On vehicles with automatic transmission (MX1) and Federal (NA5) or altitude emissions (NA6), set initial timing at 8 DEG BTDC.

(3) On vehicles with automatic transmission (MX1) and California emissions (NB2), set initial timing at 8 DEG BTDC.

(4) On vehicles with manual transmission (MY1) and California emissions (NB2), set initial timing at 4 DEG BTDC.

Use applicable labor operation.

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.