HVAC BLOWER WHINE (REPLACE ISOLATOR/FOAM SEAL). Buick Coachbuilder 1993

APPLICATION: 1992 BUICK, OLDSMOBILE AND CHEVROLET "B" CAR 1993 BUICK AND CHEVROLET "B" CAR 1993 CADILLAC "D" CAR BEFORE THE FOLLOWING VIN BREAKPOINTS:

ARLINGTON:

CHEVROLET: PR114845 BUICK: PR414675 CADILLAC: PR700563

WILLOW RUN:

CHEVROLET: PW124409 BUICK: PW404110

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.

FOR 1992 BUICK, CHEVROLET OR OLDSMOBILE B-CARS, REFER TO SECTION 1B, PAGE 21 (BLOWER MOTOR AND FAN REPLACEMENT) FOR PROCEDURE.

FOR 1993 BUICK OR CHEVROLET B-CAR, REFER TO SECTION 1B, PAGE 23 (BLOWER WITH IMPELLER MOTOR ASSEMBLY REPLACEMENT) FOR PROCEDURE.

FOR 1993 CADILLAC D-CAR REFER TO SECTION 1B (BLOWER WITH IMPELLER MOTOR ASSEMBLY REPLACEMENT) FOR PROCEDURE.

PART AVAILABILITY:

PARTS ARE EXPECTED TO BE AVAILABLE ON 04/26/93.

WARRANTY INFORMATION:

LABOR OPERATION: T1946 LABOR TIME: 0.4 HR.

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.