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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PASSLock System

The Passlock(TM) theft deterrent system is designed to prevent vehicle operation if the correct ignition key is not used to start the vehicle. The ignition key will allow the lock cylinder to turn, which allows the Passlock(TM) sensor (located inside of the ignition switch assembly) to send a code to the BCM. If the BCM receives the correct code from the Passlock(TM) sensor the BCM will send a password to the Vehicle Control Module (VCM) or the Powertrain Control Module (PCM) which will allow the vehicle to start.