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:
Safety Belt Care
Keep belts clean and dry.
WARNING
Do not bleach or dye safety belts.
It may severely weaken them.
In a crash, they might not be able to provide adequate protection.
Clean safety belts only wit ...
Manual Operation
(Power): Press to turn the climate control system on or off.
(Fan Control): Press to increase or decrease the fan speed. Pressing
either button cancels automatic operation and the system goes into ...
Flash-to-Pass
Use your high-beam headlamps to signal to a driver in front that you want to
pass. It works even if the headlamps are in the automatic position.
To use it, pull the turn signal lever toward you, th ...