For 1990-2009 cars

# SMU - SECTION 6A5- REVISED PISTON PIN

REVISION: 09/26/95

THIS BULLETIN IS BEING REVISED TO CHANGE SECTION NUMBER AND TO CHANGE PISTON PIN SPECIFICATIONS. PLEASE DISCARD BULLETIN 57-61-23. ----------------------------------------------------------------------

#### SUBJECT: SERVICE MANUAL UPDATE - SECTION 6A5 - REVISED PISTON PIN CLEARANCE SPECIFICATION

#### MODELS: 1995 BUICK CENTURY, REGAL, SKYLARK 1995 CHEVROLET BERETTA, CORSICA, LUMINA, MONTE CARLO 1995 OLDSMOBILE ACHIEVA, CUTLASS CIERA, CUTLASS SUPREME 1995 PONTIAC GRAND AM, GRAND PRIX WITH 3100 ENGINE (VIN M - RPO L82)

THERE HAS BEEN A MID-YEAR CHANGE IN THE PISTON PIN CLEARANCE. IT HAS BEEN REDUCED TO PREVENT PISTON PIN NOISE (REFER TO BULLETIN 57-61-24).

PISTON PIN SPECIFICATIONS

ENGINES PRODUCED PRIOR TO JANUARY 1995 0.0126 MM - 0.0245 MM (0.0005 IN. - 0.0010 IN.) ENGINES PRODUCED AFTER DECEMBER 1994 0.0096 MM - 0.0216 MM (0.0003 IN. - 0.0008 IN.)

FIGURES: 0

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 1995. GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.