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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OnStar - VCU or VIU Reprogramming

VCU or VIU REPROGRAMMING
After replacement of the VCU or VIU, the OnStar system must be reprogrammed. This is accomplished by putting the ignition in the accessory position, pressing and holding the Call Answer/Call End Button for approximately 10 seconds until the telltail lamp illuminates red. The telltail lamp will remain red during the programming process then change to green when programming is completed.