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 
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Advisor can run a check.
See also:
Throttle and Brake Pedal Adjustment
If the vehicle has this feature, the position of the throttle and brake
pedals can be adjusted.
The switch used to adjust the pedals is located on the right side of the
steering column, below the ...
Oil Life Remaining
If the vehicle has this display,
it shows the estimated oil life
remaining. If you see 99% Oil Life
Remaining on the display, that
means that 99% of the current oil
life remains.
When the o ...
Portable Audio Devices
Some vehicles have a 3.5 mm
(1/8 in) auxiliary input and a USB
port located in the center console.
External devices such as iPods®
laptop computers, MP3 players,
CD changers, and USB drives m ...