FRAME INSULATOR NOISE (REPLACE INSULATOR). Pontiac Trans Sport 1995

SUBJECT: FRAME INSULATOR NOISE (REPLACE INSULATORS, RETAINERS AND BOLTS)

MODELS: 1994-95 CHEVROLET LUMINA MINIVAN 1994-95 OLDSMOBILE SILHOUETTE 1994-95 PONTIAC TRANS SPORT

CONDITION:

SOME VEHICLES MAY EXHIBIT A POPPING TYPE NOISE AUDIBLE DURING MODERATE BRAKING OR ACCELERATION. TYPICALLY THIS NOISE CAN BE DETECTED AS COMING FROM ONE OR BOTH SIDES OF THE VEHICLE IN THE FRONT OF DASH/FLOOR PAN AREA AND IS SIMILIAR TO A "CRUNCHING" NOISE CAUSED BY LOOSE FRAME MOUNTING BOLTS WHICH ARE TO BE TORQUED TO 140 N.M (103 LB.FT.).

CAUSE:

REAR FRAME MOUNTS NOT CORRECTLY SEATED TO FRAME WHICH CAN RESULT IN A POPPING NOISE DURING FORE-AFT LOADING.

CORRECTION:

DETERMINE SUSPECT MOUNT LOCATION(S) AND USING A FEELER GAGE, CHECK FOR ANY GAP BETWEEN THE LOWER METAL SURFACE OF THE FRAME AND THE UPPER METAL SURFACE OF THE LOWER INSULATOR. AT MOUNT LOCATION(S) WHERE A GAP IS DETECTED, REPLACE COMPONENTS INDICATED BELOW FOLLOWING SERVICE MANUAL PROCEDURE IN SECTION 10-3, FRAME, AND THOSE IN ILLUSTRATION.

PART DESCRIPTION P/N ---------------- ---

BOLT 10203408 RETAINER 10203413 UPPER INSULATOR 14065713 LOWER INSULATOR 14103539

NOTE:

TO INSURE PROPER ASSEMBLY, IT IS RECOMMENDED AN ARBOR PRESS BE UTILIZED TO ASSEMBLE UPPER RETAINER TO UPPER INSULATOR PRIOR TO INSTALLATION IN VEHICLE.

PART AVAILABILITY:

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE: LABOR OPERATION: E1164 - UPPER INSULATOR, E1165 - LOWER INSULATOR USE PUBLISHED LABOR OPERATION TIME.

FIGURES: 1

Object Number: 85558 Size: LF

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.