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 InformationDriving for Better Fuel Economy
Driving habits can affect fuel mileage. Here are some driving tips to get the
best fuel economy possible.
Avoid fast starts and accelerate smoothly.
Brake gradually and avoid abrupt stops.
Avoid idling the engine for long periods of time.
When road and weather conditions are appropriate, ...
Tire Pressure Monitor System
The Tire Pressure Monitor System (TPMS) uses radio and sensor technology to check
tire pressure levels. The TPMS sensors monitor the air pressure in your tires and
transmit tire pressure readings to a receiver located in the vehicle.
Each tire, including the spare (if provided), should be check ...
Cruise Control
If equipped with cruise control:
Press to turn the cruise control
system on and off. A white indicator comes on in the instrument cluster.
RES/+: If there is a set speed in memory, press briefly to resume to that speed
or press and hold to accelerate. If cruise control is already active, u ...