See also:

Auto Door Unlock
This feature allows you to select whether or not the door(s) will automatically unlock. It also allows you to select which doors and when they will automatically unlock. See Automatic Door Lo ...

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 v ...

Rear Seat Pass-Through Door
Some vehicles have a rear seat pass-through door in the center of the rear seatback. Fold down the center armrest and push down on the latch to open the door. ...