SMU - SECTION 4A - PROPELLER SHAFT - REVISED FASTENER. GMC Truck GMC MD Bus Chassis (B Model) 1997

SUBJECT: SERVICE MANUAL UPDATE - SECTION 4A - PROPELLER SHAFT - REVISED FASTENER TIGHTENING SPECIFICATIONS

MODELS: 1997 CHEVROLET AND GMC MEDIUM DUTY T SERIES

THIS BULLETIN REVISES THE FASTENER TIGHTENING SPECIFICATIONS ON PAGES 4A-13 AND 4A-11 IN THE 1997 T SERIES MEDIUM DUTY SERVICE MANUAL, BOOK 1. THE CHANGES ARE AS FOLLOWS:

UNIVERSAL JOINT BEARING STRAP BOLTS

SERIES CURRENT SPEC. REVISED SPEC.

1480, 1550, + 1610 54 NM (40 LB FT) 71 NM (53 LB FT) 1710 AND 1710 HD 136 NM (100 LB FT) 170 NM (125 LB FT)

PLEASE MAKE NOTE OF THESE REVISED SPECIFICATIONS.

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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.