SMU - SECTION 7A AUTO. TRANS DIAG.(UPDATED TCC WIRING DIAG)

********************************************************************** TRANSMISSION APPLICATIONS: SUBJECT: 1993 HYDRA-MATIC 4L60 (MD8) 1993 SERVICE MANUAL UPDATE 4L60 AUTOMATIC TRANSMISSION DIAGNOSIS (GENERAL INFORMATION)

TRANSMISSION MODELS: VEHICLE APPLICATIONS: ALL B, D, F, Y -- CARS S, T -- TRUCKS WITH 2.5L **********************************************************************

BULLETIN COVERS:

NEW PRODUCT INFORMATION FOR 1993 HYDRA-MATIC 4L60 TRANSMISSIONS. THIS INFORMATION HAS BEEN UPDATED SINCE PUBLICATION OF THE 1993 SERVICE MANUAL AND SHOULD BE NOTED ACCORDINGLY. BE CERTAIN TO FAMILIARIZE YOURSELF WITH THESE UPDATES TO PROPERLY REPAIR THE 1993 HYDRA-MATIC 4L60 TRANSMISSION.

SERVICE MANUAL REFERENCE:

UPDATE YOUR 1993 SERVICE MANUAL SECTION 7A-15A AUTOMATIC TRANSMISSION DIAGNOSIS WITH THE FOLLOWING THREE (3) PAGES OF UPDATED TCC WIRING DIAGRAMS.

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER." THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS OCCURRING 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 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 1993, GM POWERTRAIN DIVISION. GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.