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

Module Information

Last 4 Digits of GM Part Number - Range 00004000 - 00005999:
This number refers to the last 4 digits of the assigned GM Part number of the Body Function Controller (BFC) Module in the car.

Calibration ID - Range 00000001 - 00000009:
This number refers to the software calibration ID of the Body Function Controller (BFC) in the car.

Year Body Function Controller (BFC) Module Built - Range 1997-:
This number refers to the model year the Body Function Controller (BFC) in the car was built for.

Body Function Controller (BFC)Option Configuration Number - Range 20000000 - 30000000:
This number is used by the Body Function Controller (BFC) in identifying the option content currently in the car.