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

Programming Theft Deterrent Module (Immobilizer)

Programming a Theft Deterrent Module means the consecutive programming of the security code, engine type, key cylinder number, vehicle identification number (VIN), and ECM to learn the new frequency code. After installation of a new Theft Deterrent Module, it must be programmed. The engine type, key cylinder number and VIN can also be programmed individually.

To obtain the security code and key cylinder number (Key code) call GM TRACS 2000 (1-800-433-6961)