OnStar Services

See also:

Traction Control System (TCS)
The traction control system limits wheel spin. The system turns on automatically every time the vehicle is started. - To turn off traction control, press and release the TCS/StabiliTrak but ...

Exit Lighting
This allows the selection of how long the exterior lamps stay on when leaving the vehicle when it is dark outside. Press the MENU/SELECT knob when Exit Lighting is highlighted. Turn the knob to ...

How to Check Lubricant
To get an accurate reading, the vehicle should be on a level surface. A. Drain Plug B. Fill Plug If the level is below the bottom of the fill plug hole, located on the transfer case, some lubri ...