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. ...

Under the Hood
A 291-hp, 4.2-liter inline-six-cylinder is standard, and a 300-hp, 5.3-liter V-8 is optional. A four-speed automatic is the sole transmission. ...

Keyless Unlocking
With the RKE transmitter within 1m(3 ft), approach the door and pull the handle to unlock and open the door. If the transmitter is recognized, the door will unlock and open. Entering any door oth ...