OnStar

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Inst (Instantaneous) Economy
Displays the current fuel economy in either liters per 100 kilometers (L/100 km) or miles per gallon (mpg). This number changes frequently as driving conditions change. It cannot be reset. ...

Torque Lock
Torque lock is when the weight of the vehicle puts too much force on the parking pawl in the transmission. This happens when parking on a hill and shifting the transmission into P (Park) is not done ...

Playing a DVD
DVD video does not display on the navigation screen unless the vehicle is in P (Park). It will operate on the rear seat entertainment screens while the vehicle is moving. The Rear Seat Entertainme ...