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
OnStar - VCU or VIU Reprogramming
Reprogram the
OnStar system after you replace the VCU or the VIU.
Place the ignition in the accessory position. Press and hold the Call Answer/Call End button for approximately
10 seconds until the telltale lamp illuminates red. The telltale lamp will remain red during the programming process then change to green when programming is completed