Verify Minutes and Expiration
Push 
and say “minutes” then
“verify” to check how many minutes
remain and their expiration date.
See also:
General Information
For service and parts needs, visit your dealer. You will receive genuine GM parts
and GM-trained and supported service people.
Genuine GM parts have one of these marks:
...
Playing from the Hard Drive Device
HDD (Hard Drive Device): Press
the HDD button to start playing
tracks from the HDD. HDD displays
and playback resumes from where it
was last stopped.
HDD Playback ModeThe infotainment system ...
Memory Seats
The controls on the driver door are used to program and recall memory settings
for the driver seat, outside mirrors, power steering column, and the adjustable
throttle and brake pedals. ...