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:
Other Information
The Bluetooth word mark and logos
are owned by the Bluetooth® SIG,
Inc. and any use of such marks by
General Motors is under license.
Other trademarks and trade names
are those of their resp ...
Adjusting the Treble, Midrange,
and Bass
1. Press the TONE button.
2. Select Treble, Midrange,
or Bass.
3. Select the value.
Press the BACK button to go
back to the Tone Settings menu. ...
Transmission
Driver Shift Control (DSC)
Driver Shift Control (DSC) allows you to shift an automatic transmission similar
to a manual transmission. To use the DSC feature:
1. Move the shift lever from D (Drive) ...