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:
Electrical System Overload
The vehicle has fuses and circuit breakers to protect against an electrical
system overload.
When the current electrical load is too heavy, the circuit breaker opens and
closes, protecting the ci ...
Canceling Guidance
Guidance is canceled once the final destination is reached. To cancel guidance
prior to arrival at the final destination:
1. Press DEST.
2. Press Cancel Guidance.
3. Press OK to confirm.
Guidanc ...
Off-Road Driving
All-wheel-drive vehicles can be used for off-road driving. Vehicles without all-wheel
drive and vehicles not equipped with All Terrain (AT) or On-Off Road (OOR) tires
must not be driven off-road e ...