See also:

Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the vehic ...

Door Locks
There are several ways to lock and unlock the vehicle. From outside, use the Remote Keyless Entry (RKE) transmitter or the key in the driver door. From inside, use the power door locks or the manual ...

Manual Mode
Electronic Range Select (ERS) Mode ERS mode allows you to choose the top-gear limit of the transmission and the vehicle's speed while driving downhill or towing a trailer. The vehicle has an electro ...