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)

Or, hide this message: temporarily or permanently

Information Bus




Data Communication Schematics

Data Link Connector Power, Ground and Low Speed GMLAN





High Speed GMLAN

High Speed GMLAN





Communications Enable (1 of 2)
Data Link Connector Power, Ground and Low Speed GMLAN

Communications Enable (1 of 2)





Communication Enable (2 of 2)
High Speed GMLAN

Communication Enable (2 of 2)





Linear Interconnect Network (LIN) 1, 2, 3, and 4 Busses
Communications Enable (1 of 2)

Linear Interconnect Network (LIN) 1, 2, 3, and 4 Busses





Linear Interconnect Network (LIN) 6, 7, 8, 9, 10 and 11 Busses
Communication Enable (2 of 2)

Linear Interconnect Network (LIN) 6, 7, 8, 9, 10 and 11 Busses





Object Bus
Linear Interconnect Network (LIN) 1, 2, 3, and 4 Busses

Object Bus





Chassis Expansion Bus
Linear Interconnect Network (LIN) 6, 7, 8, 9, 10 and 11 Busses

Chassis Expansion Bus





MOST 50 Bus
Object Bus

MOST 50 Bus





Chassis Expansion Bus