REDUCTION OF ENGINE EXHAUST NOISE (REPLACE MUFFLER). Oldsmobile Bravada 1992

THIS BULLETIN IS BEING REVISED TO INFORM "GM OF CANADA" DEALERS THAT THEY ARE NOT AUTHORIZED TO UTILIZE THIS SERVICE BULLETIN.

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"GM OF CANADA" DEALERS ARE NOT AUTHORIZED TO UTILIZE THIS SERVICE BULLETIN.

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SUBJECT: REDUCTION OF ENGINE EXHAUST NOISE (REPLACE MUFFLER AND/OR CATALYTIC CONVERTER HANGER)

MODELS: 1992-93 OLDSMOBILE BRAVADA T UTILITY

CONDITION:

SOME OWNERS MAY COMMENT THAT THEIR VEHICLE EXHIBITS AN UNDESIRABLE LEVEL OF ENGINE EXHAUST NOISE. THEY MAY ALSO INDICATE THAT THERE IS AN EXHAUST RESONANCE OR BOOM NOISE

CAUSE:

EXHAUST NOISE IS DUE TO THE TUNING OF THE EXHAUST SYSTEM. EXHAUST RESONANCE OR BOOM NOISE IS DUE TO THE CATALYTIC CONVERTER MOUNT GROUNDING OUT.

CORRECTION:

EHAUST NOISE LEVELS CAN BE REDUCED BY REPLACING THE MUFFLER AND TAIL PIPE WITH A RE-TUNED MUFFLER. EXHAUST RESONANCE CAN BE CORRECTED BY REPLACING THE CATALYTIC CONVERTER HANGER WITH A REDESIGNED HANGER.

SERVICE PARTS INFORMATION

P/N DESCRIPTION ENGINE QTY 12545734 MUFFLER L35 1 12545735 MUFFLER LB4 1 15662531 TAIL PIPE L35/LB4 1 15973620 HANGER L35 1 15973616 HANGER LB4 1

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

WARRANTY INFORMATION

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OP DESCRIPTION LABOR TIME L2584 MUFFLER-REPLACE USE PUBLISHED L2020 HANGER, EXHAUST-REPLACE LABOR OPERATION TIME

FIGURES: 0

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO IMFORM 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.