A/T - Revised Wiring Diagram Information

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Number: 90-2O5-7A

Section: 7A

Date: April 1990

Corporate Bulletin: 077101


Subject:
REVISED WIRING DIAGRAM INFORMATION


Model and Year:
1990 A, J, L, W CARS AND U VAN WITH 3T40 (125C) AUTOMATIC TRANSMISSION


TO: ALL CHEVROLET DEALERS


THIS BULLETIN CANCELS AND SUPERSEDES DEALER SERVICE BULLETIN NO. 90-143-7A. THE ARTWORK HAS BEEN REVISED. ALL COPIES OF 90-143-7A SHOULD BE DISCARDED.











This bulletin covers revised Wiring Diagram Information and eight 1990 HYDRA-MATIC 3T40 models added after the printing of the 1990 Service Manuals. (See Figures 1 thru 6.)

Currently some of the 1990 Service Manual wiring diagrams reference terminal path D "TO EGR SOL." This has been changed to "TO ECM" whenever referenced in the wiring diagrams. EGR SOL means "Energize Solenoid," not "Exhaust Gas Recirculation Solenoid."

Models added are: HCC, HPC, HXC, HSC, HTC, HWC, KKC, LKC.

Refer to this bulletin whenever service to any 1990 wiring assembly is necessary. All other instructions and procedures are the same as published in the 1990 7A Section of your service manual.