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:
Steps for Determining Correct
Load Limit
1. Locate the statement
“The combined weight of
occupants and cargo should
never exceed XXX kg or
XXX lbs” on your vehicle's
placard.
2. Determine the combined
weight of the driver and
...
Setting Cruise Control
If the cruise button is on when not in
use, it could get bumped and go into
cruise when not desired. Keep the
cruise control switch off when cruise
is not being used.
The cruise control light ...
Automatic EPB Release
The EPB will automatically release if the vehicle is running, placed into
gear, and an attempt is made to drive away. Avoid rapid acceleration when the
EPB is applied, to preserve parking brake lini ...