SMU - SECTION 4B7 - LOCKING DIFFERENTIAL, REVISED LUB.
REVISION: 07/30/96
THIS BULLETIN IS BEING REVISED TO CHANGE THE MODELS APPLICABLE AND TO CORRECT THE LUBRICATION INFORMATION. PLEASE DISCARD CORPORATE BULLETIN 66-42-03 (SECTION 4 - DRIVE AXLE). ----------------------------------------------------------------------
SUBJECT: SERVICE MANUAL UPDATE - SECTION 4B7 - LOCKING DIFFERENTIAL, REVISED LUBRICATION INFORMATION
MODELS: 1996 CHEVROLET AND GMC TRUCK C/K MODELS
THE LUBRICATION INFORMATION ON PAGE 4B7-11 IN THE 1996 C/K SERVICE MANUALS IS CORRECT.
* USE SAE 80W-90 GL-4, GM P/N 1052271, OIL WHEN ADDING OR REPLACING OIL IN THE DIFFERENTIALS SUPPORTED IN SECTION 4B7.
* DO NOT USE SAE 75 W-140 GL-5, GM P/N 12346140, IN THE DIFFERENTIALS SUPPORTED IN SECTION 4B7.
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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.
