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. ...

Exterior
The 2007 Escalade EXT is roughly the same size as its predecessor, losing 1.5 inches of height but gaining an inch of length. Cargo room is up, with a rear cargo bed that has 45.5 cubic feet of vo ...

XM™ Satellite Radio Service
XM Satellite Radio Service gives digital radio reception from coast to coast in the 48 contiguous United States, and in Canada. Just as with FM, tall buildings or hills can interfere with sa ...