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

SUBJECT: DELAYED AND/OR INSUFFICIENT INTERIOR COOLING AT IDLE -------

MODELS AFFECTED: 1988 SKYHAWKS EQUIPPED WITH THE 2.0L --------------- LT2 4-CYLINDER ENGINE (VIN CODE K)

NOTICE: This bulletin is being revised to indicate the correct manual transaxle PROM numbers for the 'J' car. Please discard 88-1-5 and replace it with 88-1-5A.

Some early-built 1988 Skyhawks 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 85 F.

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

Automatic Manual Transaxle Transaxle PROM # PROM # --------- ---------- 16086129 16089817

Vehicles are currently being produced with corrected PROMS, beginning with the following VIN breakpoints:

Automatic Manual Transaxle Transaxle VIN Breakpoint VIN Breakpoints -------------- --------------- Skyhawk JK401585 JK416124

WARRANTY INFORMATION

Use applicable labor time and operation number.

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.