INFORMATION ON TRANSAXLE TEST BOX HARNESS. Chevrolet Lumina 1994

SUBJECT: INFORMATION ON TRANSAXLE TEST BOX HARNESS J 38791-70

MODELS: 1994 CHEVROLET LUMINA

TRANSAXLE APPLICATIONS: HYDRA-MATIC 4T60-E (RPO M13)

TRANSAXLE MODELS: 4CMW

+--------------------------------------------------------------------+ | INFORMATION | +--------------------------------------------------------------------+

A NEW TRANSAXLE TEST BOX HARNESS, J 38791-70, WILL BE SHIPPED BEGINNING SEPTEMBER, 1994. THIS HARNESS MUST BE USED WITH TRANSAXLE TEST BOX J 38791 TO DIAGNOSE HYDRA-MATIC 4T60-E (RPO M13) TRANSAXLE MODEL 4CMW. THIS TRANSAXLE MODEL HAS UNIQUE INTERNAL WIRING AND CONNECTOR CIRCUIT LOCATIONS THAT DO NOT ALLOW THE USE OF HARNESS J 38791-60 (ESSENTIAL FOR ALL OTHER 1994 4T60-E MODELS) OR PREVIOUS MODEL YEAR HARNESSES (J 38791-10, J 38791-20, ETC.).

IMPORTANT: USING THE WRONG TRANSAXLE TEST BOX HARNESS WITH TRANSAXLE TEST BOX J 38791 TO DIAGNOSE A 4T60-E TRANSAXLE MAY CAUSE TEST BOX DAMAGE, TRANSAXLE WIRING OR ELECTRICAL COMPONENT DAMAGE, OR INACCURATE TRANSAXLE DIAGNOSIS. ALWAYS VERIFY THE CORRECT TRANSAXLE TEST BOX HARNESS IS BEING USED PRIOR TO CONNECTION TO THE TRANSAXLE.

ALSO INCLUDED WITH THIS BULLETIN ARE UPDATED ELECTRICAL DIAGNOSIS CHARTS FOR USE WITH 4T60-E MODEL 4CMW AND THE TRANSAXLE TEST BOX J 38791 AND HARNESS J 38791-70. DIAGNOSIS FOR MODEL 4CMW IS NOT PROVIDED IN THE 1994 SERVICE MANUAL.

FIGURES: 1 ATTACHMENTS: 5

Object Number: 84054 Size: FS

Object Number: 84053 Size: FS

Object Number: 84052 Size: FS

Object Number: 82924 Size: FS

Object Number: 82923 Size: FS

Object Number: 85147 Size: FS

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.