A/C - Blower Motor Whine In Low Speed

NUMBER: 92-T-175

CORP.REF.NO: 331206

DATE: June 1993

SECTION: 1B

SUBJECT:
HVAC BLOWER MOTOR WHINE - REPLACE ISOLATOR AND FOAM SEAL

MODELS/YEARS:
1992 CUSTOM CRUISER

CONDITION:
Some vehicles may have a whining sound when the blower motor is operating in low blower mode.

CAUSE:
The blower motor isolator does not isolate blower motor vibrations from the air conditioning module satisfactorily.

CORRECTION:
Replace existing isolator and foam seal with softer isolator. Fasteners must not be torqued over the recommended specifications, 1.9 N-m (17 lb.in.), or the effect of the isolator will be negated. Use P/N 52465887. Disregard the number stamped on the isolator, refer to packaging to identify the correct part number.

Refer to service manual section 1B, page 21 (Blower Motor And Fan Replacement) for procedure.

PART INFORMATION:
Parts are currently available from GMSPO.

WARRANTY INFORMATION:
Use current Labor Time Guide.