Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Pinpoint Tests Notes




External Controls

Pinpoint Tests

Refer to Wiring Diagram Set 29, Transmission Controls (4R70E/4R75E) for schematic and connector information. Diagrams By Number

Refer to Wiring Diagram Set 30, Transmission Controls (TorqShift) for schematic and connector information. Diagrams By Number

Refer to Wiring Diagram Set 37, Shift Interlock for schematic and connector information. Diagrams By Number

NOTE: Refer to all TSBs and On-Line Automotive Service Information System (OASIS) messages that pertain to the transmission concern and follow the procedure as described.