A/C INTERMITTENTLY INOPERATIVE INSUFF. AIR FLOW-CONDEN. CORE

VEHICLES AFFECTED: 1984 and 1985 'A' Model With 3.0L V6 Engine (VIN Code E) 1985 'C' Model With 3.0L V6 Engine (VIN Code E) - U.S. Only

When a 1984 or 1985 'A' model equipped with a 3.0L engine and built before April, 1985 or a 1985 'C' model with 3.0L engine is operated at high ambient temperatures with the air conditioning on, and under the operating conditions listed below; the driver may experience intermittent reduced air conditioning performance:

- Driving up long, steep highway grades - Idling the engine - Driving in congested city traffic

This reduced air conditioning performance may be the result of insufficient air flow through the condenser core.

To repair this condition the coolant fail resistor, located on one leg of the coolant fan motor support, may be bypassed by installing a coolant fan resistor jumper, part number 12046159. Disconnect the resistor and connect lead to the coolant fan resistor jumper. Remove resistor and attach jumper to leg of coolant fan motor support using screw that previously retained resistor. Bypassing the resistor allows the coolant fan to operate on high speed whenever at runs.

Production 'A' models built after March 1985, have improved engine coolant fan controls to compensate for this condition.

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.