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:
Fuel Gauge
Metric
English
When the ignition is on, the fuel gauge shows about how much fuel is left in the fuel tank.
An arrow on the fuel gauge indicates the side of the vehicle the fuel door is on.
The ...
Speedometer
The speedometer shows how fast the vehicle is moving in either kilometers per hour (km/h) or miles per hour (mph). The speedometer cannot be reset. ...
Ending Cruise Control
There are three ways to end cruise control:
• To disengage cruise control; step lightly on the brake pedal.
• Press on the steering wheel.
• To turn off the cruise control, press
on the st ...