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 InformationWindshield and Wiper Blades
Clean the outside of the windshield with glass cleaner.
Clean rubber blades using a lint-free cloth or paper towel soaked with windshield
washer fluid or a mild detergent. Wash the windshield thoroughly when cleaning the
blades. Bugs, road grime, sap, and a buildup of vehicle wash/wax treatment ...
Turn and Lane-Change Signals
Move the lever all the way up or down to signal a turn.
An arrow on the instrument cluster flashes in the direction of the turn or lane
change.
Raise or lower the lever until the arrow starts to flash to signal a lane change.
Hold it there until the lane change is completed.
If the lever ...
Tire Pressure Light
For vehicles with the Tire Pressure
Monitor System (TPMS), this light comes on briefly when the engine is started. It
provides information about tire pressures and the TPMS.
When the Light Is On Steady
This indicates that one or more of the tires are significantly underinflated.
Stop as soon ...