POPPING NOISE FROM LEFT SIDE OF VEHICLE

SUBJECT: POPPING NOISE FROM LEFT SIDE OF VEHICLE DURING MODERATE BRAKING OR ACCELERATION (FABRICATE AND INSTALL SHIM)

MODELS: 1995 BUICK REGAL 1995 CHEVROLET LUMINA, MONTE CARLO 1995 OLDSMOBILE CUTLASS SUPREME 1995 PONTIAC GRAND PRIX

CONDITION:

SOME OWNERS MAY COMMENT ON A POPPING NOISE FROM THE LEFT SIDE OF THE VEHICLE IN THE DASH/FLOOR PAN AREA DURING MODERATE BRAKING OR ACCELERATION MANEUVERS.

CAUSE:

LEFT LOWER REAR INSULATOR ASSEMBLY IS LOOSE IN FRAME DUE TO OVERSIZED FRAME HOLE. SUSPECT FRAME ASSEMBLIES CAN BE IDENTIFIED BY BUILD DATE AND MANUFACTURING STATION/CELL NUMBER AS SHOWN IN FIGURE 1.

CORRECTION:

ON VEHICLES ASSEMBLED WITH SUSPECT FRAME ASSEMBLIES, INSTALL A .625MM (.025") STEEL SHIM OF THE CONFIGURATION SHOWN IN FIGURE 2, BETWEEN THE LOWER INSULATOR AND FRAME FOLLOWING THE PROCEDURE BELOW.

NOTICE: THE WHEELS OF THE VEHICLE MUST BE STRAIGHT AHEAD AND THE STEERING COLUMN IN THE "LOCK" POSITION BEFORE DISCONNECTING THE STEERING COLUMN OR INTERMEDIATE SHAFT FROM THE STEERING GEAR. FAILURE TO DO SO WILL CAUSE THE SIR COIL ASSEMBLY TO BECOME UNCENTERED, WHICH WILL CAUSE DAMAGE TO THE COIL ASSEMBLY.

1. POSITION INTERMEDIATE SHAFT SEAL FOR ACCESS TO LOWER PINCH BOLT.

2. REMOVE PINCH BOLT AT STEERING GEAR STUB SHAFT AND DISCONNECT INTERMEDIATE SHAFT FROM STUB SHAFT.

CAUTION:

FAILURE TO DISCONNECT THE INTERMEDIATE SHAFT FROM THE RACK AND PINION STUB SHAFT CAN RESULT IN DAMAGE TO THE STEERING GEAR AND/OR INTERMEDIATE SHAFT. THIS DAMAGE CAN CAUSE LOSS OF STEERING CONTROL WHICH COULD RESULT IN PERSONAL INJURY.

3. RAISE VEHICLE AND SUPPORT FRAME WITH A JACK STAND ON THE REAR FRAME CROSS MEMBER. REFER TO THE SERVICE MANUAL, SECTION 0A, GENERAL INFORMATION.

4. REMOVE AND DISCARD BOTH REAR FRAME BOLTS AND LOWER JACK STAND ENOUGH TO REMOVE LEFT REAR MOUNT FROM THE FRAME.

5. REMOVE LEFT REAR LOWER RETAINER AND INSULATOR AND FORM FABRICATED SHIM TO INSULATOR AS SHOWN IN FIGURE 2.

6. ASSEMBLE MOUNT TO FRAME UTILIZING A SOAP AND WATER SOLUTION AS A LUBRICANT IF REQUIRED.

7. RAISE FRAME ASSEMBLY AND ALIGN/CONNECT STEER GEAR STUB SHAFT TO INTERMEDIATE SHAFT.

8. INSTALL NEW FRAME BOLTS, P/N 10264358, AND TORQUE TO 170 N.M (125 LB FT).

9. INSTALL/TORQUE INTERMEDIATE SHAFT LOWER PINCH BOLT TO 47 N.M (35 LB FT) AND POSITION SHAFT SEAL.

10. LOWER VEHICLE.

PART AVAILABILITY:

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE: LABOR OPERATION NUMBER: E1165 LABOR TIME: 0.8 HR

FIGURES: 2 ATTACHMENTS: 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.

COPYRIGHT 1995 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.