OnStar Vehicle Diagnostics can perform a vehicle check every month. It will check
the engine, transmission, antilock brakes, and other major vehicle systems. It also
checks the tire pressures, if the vehicle is equipped with the Tire Pressure Monitoring
System. If an On-Demand Diagnostics check is needed, press
, and an Advisor can run a check.
Connections
OnStar Additional InformationFog Lamps
If equipped with fog lamps, they are controlled by the
band on the middle of the turn signal
lever.
To use the fog lamps, the ignition must be turned on and the low-beam headlamps
or parking lamps must be on.
Turn the band to to turn the fog
lamps on. The band automatically returns to ...
Charging System Light
This light will come on briefly
when the ignition is turned on, and the engine is not running, as a check to show
it is working.
It should go out when the engine is started. If it stays on, or comes on while
driving, there may be a problem with the electrical charging system. Have it checked ...
Cruise Control
If equipped with cruise control, the vehicle can maintain a speed of about 40
km/h (25 mph) or more without keeping your foot on the accelerator. Cruise control
does not work at speeds below 40 km/h (25 mph).
Warning
Cruise control can be dangerous where you cannot drive safely
at a steady s ...