FM
FM signals only reach about 16 to 65 km (10 to 40 mi). Although the radio has a built-in electronic circuit that automatically works to reduce interference, some static can occur, especially around tall buildings or hills, causing the sound to fade in and out.
See also:
Finding a Channel
BAND: Press to switch between AM, FM, or XM™, if equipped.
(Tune): Turn to manually select an XM channel.
SEEK: Press to go to the previous XM channel.
SEEK: Press to go to the next XM channel ...
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 ...
Replacement Bulbs
For replacement bulbs not listed here, contact your dealer. ...