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 InformationIf No Steam Is Coming from the Engine Compartment
If an engine overheat warning is displayed but no steam can be seen or heard,
the problem may not be too serious. Sometimes the engine can get a little too hot
when the vehicle:
Climbs a long hill on a hot day.
Stops after high-speed driving.
Idles for long periods in traffic.
If the ...
Seat Adjustment
Manual Seats
Warning
You can lose control of the vehicle if you try to adjust a driver
seat while the vehicle is moving.
Adjust the driver seat only when the vehicle is not moving.
To adjust the seat:
Lift the bar under the front edge of the seat cushion to unlock the seat.
Slide the ...
Rear Window Wiper/ Washer
If equipped with the rear wiper/ washer, the controls are on the end of the windshield
wiper lever.
Turn the rear wiper/washer band to operate the rear window wiper/ washer.
ON: Turns the rear wiper on for continuous wipes.
OFF: Turns the rear wiper off.
(Rear Washer): Sprays washer fluid ...