DELAYED OR INADEQUATE ENGINE COOLING AT IDLE WITH A/C ON. Pontiac Sunbird 1988

For 1990-2009 cars

# DELAYED OR INADEQUATE ENGINE COOLING AT IDLE WITH A/C ON

DELAYED AND/OR INSUFFICIENT INTERIOR COOLING AT IDLE Revised to indicate the correct manual transaxle prom

#### VEHICLES AFFECTED 1988 J SERIES EQUIPPED WITH 2.0L ----------------- (VIN CODE K) LT2 4 CYLINDER ENGINE

Some early-built 1988 'J' series vehicles may exhibit delayed and/or insufficient cooling with the air conditioning mode selected. This is due to the engine cooling fan not operating in the A/C mode when the outside air temperatures is below 30 degrees C.

This condition can be addressed by installing the following service PROMS:

Automatic Manual Transaxle Transaxle PROM# PROM# --------- --------- Firenza/Skyhawk 16086129 16089817 Sunbird 16086125 16089813

Vehicles are currently being produced with corrected PROMS, beginning with the following VIN breakpoints: Automatic Manual TRANSAXLE TRANSAXLE VIN Breakpoints VIN Breakpoints --------------- --------------- Firenza JK300676 JK306426 Skyhawk JK401585 JK416124 Sunbird J7500363 J7525993

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.