For 1990-2009 cars

# SMU - SECTION 0C - REVISED TIRE/WHEEL & PROPSHAFT

REVISION: 07/17/97

THIS BULLETIN IS BEING REVISED TO UPDATE THE TIRE/WHEEL AND PROPSHAFT ROTATIONAL WORKSHEET (CLARIFICATION PURPOSES). PLEASE DISCARD CORPORATE BULLETIN NUMBER 63-01-03 (SECTION 0 - GENERAL INFORMATION). ______________________________________________________________________

#### SUBJECT: SERVICE MANUAL UPDATE - SECTION 0C - REVISED TIRE/WHEEL AND PROPSHAFT ROTATIONAL WORKSHEET

#### MODELS: 1997 PASSENGER CARS (EXCEPT CAMARO, CATERA, CONCOURS, CORVETTE, DEVILLE, ELDORADO, FIREBIRD, SEVILLE, TRANS AM) 1997 CHEVROLET VENTURE 1997 GEO TRACKER 1997 OLDSMOBILE SILHOUETTE 1997 PONTIAC TRANS SPORT

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THIS BULLETIN IS BEING ISSUED TO REVISE THE TIRE/WHEEL AND PROPSHAFT ROTATIONAL WORKSHEET IN SECTION 0C OF THE SERVICE MANUAL.

THE PREVIOUSLY RELEASED TIRE/WHEEL ROTATIONAL WORKSHEET OR THE TIRE/WHEEL AND PROPSHAFT ROTATIONAL WORKSHEET DID NOT PROMPT THE USER TO CONSISTENTLY INPUT A STANDARD AND/OR METRIC VALUE ON THE WORKSHEET. THIS COULD LEAD THE USER TO AN INCORRECT DIAGNOSIS OF A VIBRATION. THE ATTACHED REVISED WORKSHEET IS APPLICABLE TO FRONT, REAR, AND FOUR-WHEEL DRIVE VEHICLES AS IT INCLUDES THE FORMULA FOR CALCULATING PROPSHAFT SPEED.

FIGURES: 01 ATTACHMENTS: 00

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 1997 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.