REDUCED A/C COOLING AT IDLE REPAIR INFORMATION

Models Affected: 1988 GRAND PRIX

Customer comments have been received of reduced A/C cooling at idle on the 1988 Grand Prix models. This may be caused by an A/C intermediate pressure switch (internal corrosion) which will not allow the engine cooling fan to engage with the A/C "On." To address this condition, disconnect the switch harness connector, cover the connector end with tape to prevent water entry, and tape back wire harness. This will allow the cooling fan to run whenever the A/C is "On." The switch is located on the hi-pressure (liquid line) clamped to the left-hand side of engine compartment rail near the condenser and directly below the suction line.

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.