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
vehicle is equipped with the Tire
Pressure Monitoring System. If a
diagnostics check is needed
between e-mails, push 
, and
an Advisor can run a check.
See also:
Traction Control System (TCS)
The traction control system limits wheel spin. The system is on when the
vehicle is started.
- To turn off traction control, press and release located on the console.
illuminates and the a ...
XM Tune Select (If Equipped)
While the XM audio screen is displaying and a song is being listened to, press
Tune Select to save that particular song.
The XM Tune Select menu displays with options to store by the song title ...
Auto Door Lock
This feature allows you to select
when the vehicle's doors will
automatically lock. See Automatic
Door Locks for more
information.
Press the customization button until
Auto Door Lock appear ...