For 1990-2009 cars

# INFO. - ELIMINATION OF FRONT EXHAUST HANGER INSULATORS

REVISION: 09/03/96

THIS INFORMATION WAS PREVIOUSLY SENT AS A DCS MESSAGE AND IS NOW BEING ISSUED AS A DEALER SERVICE BULLETIN. PREVIOUS DCS MESSAGE NUMBERS WERE: BUICK 96-22 OLDSMOBILE 96-162 **********************************************************************

#### SUBJECT: INFORMATION - ELIMINATION OF FRONT EXHAUST HANGER INSULATORS (RUBBER O-RINGS)

#### MODELS: 1997 BUICK PARK AVENUE/ULTRA, RIVIERA 1997 OLDSMOBILE AURORA

THE ABOVE LISTED MODELS ARE BUILT WITH THE FRONT EXHAUST HANGER INSULATORS (RUBBER O-RINGS) REMOVED (SEE FIGURE 1). THESE INSULATORS (RUBBER O-RINGS) HAVE BEEN REMOVED TO IMPROVE THE LEVEL OF EXHAUST NOISES. THE HANGER BRACKETS WELDED TO THE BODY AND EXHAUST ARE STILL PRESENT ON THE VEHICLE. DEALER TECHNICIANS MAY NOTICE THE ABSENCE OF THESE INSULATORS (RUBBER O-RINGS) AT THE REAR OF THE CATALYTIC CONVERTER. DEALER TECHNICIANS SHOULD NOT INSTALL INSULATORS AT THIS LOCATION AS THEY HAVE BEEN REMOVED TO REDUCE EXHAUST NOISES. THE BRACKETS WILL BE REMOVED FROM THE VEHICLE UNDERBODY AND EXHAUST ON FUTURE BUILDS.

FIGURES: 01 ATTACHMENTS: 00

FIGURE 1: 1. CATALYTIC CONVERTER 2. INSULATOR (RUBBER O-RING) 3. RESONATOR

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 1996 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.