See also:

Cellular and GPS Antennas
Avoid placing items over or near the antenna to prevent blocking cellular and GPS signal reception. Cellular reception is required for OnStar to send remote signals to the vehicle. ...

Rocking Your Vehicle to Get It Out
First, turn the steering wheel left and right. That will clear the area around the front wheels. Then shift back and forth between REVERSE (R) and a forward gear, spinning the wheels as little ...

Running the Vehicle While Parked
It is better not to park with the engine running. But if you ever have to, here are some things to know. WARNING Idling a vehicle in an enclosed area with poor ventilation is dangerous. Engine ex ...