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:
Steering Wheel Controls
For vehicles with audio steering wheel controls, some audio controls can be adjusted
at the steering wheel.
: Press to interact with the available
Bluetooth, OnStar, or navigation system.
: P ...
Error Messages
If Disc Read Error displays and/or the disc comes out, it could be for one of
the following reasons:
The disc has an invalid or unknown format.
The disc is not from a correct region.
The dis ...
Trunk Release
To open the trunk, press . ...