MANUAL CLIMATE CONTROL A/C CLUTCH INOP.(NEW P/N RELEASED)

SUBJECT: MANUAL CLIMATE CONTROL A/C CLUTCH INOPERATIVE

MODELS AFFECTED: 1991 PARK AVENUE

CONDITION:

----------- Customers of 1991 Park Avenues built with "C67" (Manual Climate Control) may comment that the windshield sometimes fogs up after the defrost or defog mode is selected.

CAUSE:

------ The cause of this condition is an error in the logic of the control head. The head is programmed to only request A/C clutch when A/C is selected.

CORRECTION:

----------- To correct the above condition, a new control head has been designed to request clutch operation in defrost and defog. This control head is matched with the solenoid pack and will require that a new solenoid pack be installed with the new control head.

PARTS INFORMATION:

The new control head can be obtained through GMSPO by ordering part number (16145214 Heated Back Glass) or (16145204 without Heated Back Glass). The new solenoid pack that must be installed to match the new control head can be obtained through GMSPO by ordering part number 16166674 with and without Heated Back Glass. Parts are currently available from GMSPO.

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.