For 1990-2009 cars

# INFO. ON ENGINE / TRANSAXLE MOUNT REPLACEMENT

#### SUBJECT: INFORMATION ON ENGINE/TRANSAXLE MOUNT REPLACEMENT DUE TO EXCESSIVE ENGINE ROLL

#### MODELS: 1992-96 BUICK SKYLARK 1995-96 CHEVROLET CAVALIER 1992-96 OLDSMOBILE ACHIEVA 1992-96 PONTIAC GRAND AM 1995-96 PONTIAC SUNFIRE

SOME DEALERS ARE REPLACING ENGINE MOUNTS AND/OR TRANSAXLE MOUNTS DUE TO EXCESSIVE ENGINE ROLL.

HOWEVER, A LARGE AMOUNT OF ENGINE ROLL IS DESIGN INTENT. THE ENGINE/TRANSAXLE MOUNTS ARE NOT TO BE REPLACED FOR AN EXCESSIVE ENGINE ROLL CONDITION UNLESS VERIFIED DEFECTIVE. ELIMINATE ALL OTHER POSSIBILITIES FOR APPARENT CONDITION. WHEN SUSPECTING AN ENGINE/TRANSAXLE MOUNT, COMPARE CONDITION WITH ANOTHER VEHICLE OF SAME MODEL AND POWERTRAIN COMBINATION BEFORE REPLACEMENT OF A MOUNT.

#### IMPORTANT: DURING REPLACEMENT OF ANY ENGINE OR TRANSAXLE MOUNT, THE MOUNT MAY BECOME PRELOADED. THIS HAS BEEN FOUND TO CAUSE AN ENGINE VIBRATION AT TIMES. THEREFORE, WHEN REPLACING ANY MOUNT, THE TRANSAXLE MOUNT EXPANSION PLUG SHOULD BE LOOSENED DURING REPLACEMENT AND TIGHTENED WHEN REPLACEMENT IS COMPLETE. BE SURE TO TORQUE THE EXPANSION PLUG TO THE PROPER SPECIFICATION.

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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.