OnStar Services

See also:

Passenger Safety Belt Reminder Light
When the vehicle is started this light flashes and a chime may come on to remind the front passenger to fasten their safety belt. Then the light stays on solid until the belt is buckled. This ...

Folding Mirrors
Manual Vehicles with manual fold mirrors are folded inward toward the vehicle to prevent damage when going through an automatic car wash. Push the mirror outward, to return it to the origina ...

Adding Coolant to the Intercooler System Coolant (CTS-V)
1. Remove the intercooler system pressure cap when the intercooler system hoses are no longer hot. Turn the pressure cap slowly counterclockwise about one-quarter of a turn. If you hear a ...