A/C COMPRESSOR BUMP (REPLACE A/C COMPRESSOR). Chevrolet Camaro 1993

SUBJECT: A/C COMPRESSOR BUMP (REPLACE A/C COMPRESSOR PULLEY, ENGINE ACCESSORY BELT AND (BELT TENSIONER, 1993 VEHICLES ONLY))

MODELS: 1993-94 CHEVROLET CAMARO 1993-94 PONTIAC FIREBIRD WITH V-8 ENGINE 1994 VEHICLES WITH AUTOMATIC TRANSMISSION ONLY: BUILT PRIOR TO CHEVROLET VIN 146046 BUILT PRIOR TO PONTIAC VIN 218956

CONDITION:

SOME CUSTOMERS MAY COMMENT ABOUT AN A/C COMPRESSOR "BUMP" FEEL WHEN COMPRESSOR CYCLES.

CAUSE:

ENGINE POWER REQUIREMENT CHANGES WHEN COMPRESSOR CYCLES ON AND OFF.

CORRECTION:

1993 VEHICLES: AN "L" SIZE A/C COMPRESSOR PULLEY (WHICH HAS A LARGER DIAMETER THAN THE PREVIOUS "G" PULLEY), A LONGER ENGINE ACCESSORY BELT, AND A REVISED BELT TENSIONER WILL IMPROVE A/C COMPRESSOR "BUMP" FEEL.

1994 VEHICLES: AN "L" SIZE A/C COMPRESSOR PULLEY, AND A LONGER ENGINE ACCESSORY BELT WILL IMPROVE A/C COMPRESSOR "BUMP" FEEL. THE REVISED BELT TENSIONER IS NOT NEEDED FOR 1994 REPAIRS AS IT WAS IMPLEMENTED FOR ALL 1994 VEHICLES.

REPLACE COMPRESSOR PULLEY PER SERVICE MANUAL SECTION 1D2. PROCEDURE FOR DRIVE BELT AND TENSIONER ASSEMBLY CAN BE FOUND IN SECTION 6A3A.

PARTS INFORMATION:

P/N PULLEY AND BEARING ASSEMBLY ("L" PULLEY) 2724717 TENSIONER ASSEMBLY 10238703 BELT-GEN. AND A/C AND P/S PUMP ASM - MANUAL TRANS. 12550149 BELT-GEN. AND A/C AND P/S PUMP ASM - AUTOMATIC TRANS. 10238702

PARTS ARE EXPECTED TO BE AVAILABLE FROM GMSPO BY 11/29/93.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE: LABOR OPERATION: D4280 USE PUBLISHED LABOR OPERATION TIME.

FIGURES: 0

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.