For 1990-2009 cars

# INFORMATION ON NEW PRODUCT INFORMATION

#### SUBJECT: INFORMATION ON NEW PRODUCT INFORMATION

#### MODELS: 1997 CHEVROLET CAMARO, CORVETTE 1997 PONTIAC FIREBIRD 1997 HOLDEN COMMODORE (VS MODEL)

1997 CHEVROLET AND GMC C/K, M/L, S/T, G MODELS 1997 OLDSMOBILE BRAVADA WITH HYDRA-MATIC 4L60-E TRANSMISSION (RPO M30)

THE HYDRA-MATIC 4L60-E TRANSMISSION HAS RECEIVED THE FOLLOWING REFINEMENTS FOR THE 1997 MODEL YEAR (FIGURES 1-7):

* OIL PUMP (13 VANES)/TO BALANCE PRESSURE AND REDUCE NOISE

* CHANNELING IN PUMP COVER/13 VANE PUMP

* INPUT--STAMPED AND BONDED PISTONS (FORWARD AND OVERRUN CLUTCHES)/ ELIMINATED FORWARD CLUTCH DAMAGE

* SPRING ASSEMBLY (OVERRUN CLUTCH)/BONDED PISTON CHANGE

* REVERSE AND LOW AND REVERSE CLUTCH PACK TURBULATOR PLATES (SLOTS IN PLATES)/TO IMPROVE COOLING AND LUBRICATION

* 3-4 CLUTCH FRICTION PLATES/NEW MATERIAL FOR IMPROVED DURABILITY

* 3-4 CLUTCH STEEL PLATES/NEW MATERIAL FOR IMPROVED DURABILITY

* ALUMINUM SPOOL VALVES/ANODIZED MATERIAL TO REDUCE LEAKAGE

* WIRING HARNESS/PUSH-ON FEATURE, POSITIVE PRESSURE CONTROL SOLENOID CONNECTOR TO EASE ASSEMBLY

* REVISED SPEED SENSOR BRACKET/NEW PROTECTIVE BRACKET FOR SHIPPING

FIGURES: 7 ATTACHMENTS: 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 1996. GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.