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:
Checking Engine Oil
It is a good idea to check the engine oil level at each fuel fill. In order
to get an accurate reading, the vehicle must be on level ground.
The engine oil dipstick handle is a yellow loop. See En ...
Competitive Driving Mode
To select this optional handling
mode, press the TCS/StabiliTrak
button quickly two times and
STABILITRAK COMPETITIVE
MODE displays in the Driver
Information Center (DIC). While in
the Sta ...
Connecting a USB Storage Device or iPod®
The USB Port, located on the instrument panel or in the center console, can be
used to control an iPod or a USB storage device.
To avoid connection problems, extension cords are not recommended. Us ...