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

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Electrical Diagrams


Automatic Transmission Controls Diagrams

Valve Controls Diagram - 4.3L:





Valve Controls - 4.3L

Switch Inputs and PNP Switch Diagram - 4.3L:





Switch Inputs and PNP Switch - 4.3L

VSS Inputs, 4WD Low Indicator Signal Diagram - 4.3L:





VSS Inputs, 4WD Low Indicator Signal - 4.3L

Brake Switch Input (4.3L) and Tow/Haul Switch Diagram:





Brake Switch Input (4.3L) and Tow/Haul Switch

Locations: The locations for the Connectors, Ground, Splices, and Grommets shown within these diagrams can be found via their numbers at Vehicle Locations. Locations