OnStar Services

See also:

Turn and Lane-Change Signals
An arrow on the instrument panel cluster flashes in the direction of the turn or lane change. Move the turn signal lever all the way up or down to signal a turn. Raise or lower the lever until t ...

Traction Control System (TCS)/StabiliTrak® Light
The StabiliTrak or Traction Control System (TCS) indicator/warning light comes on briefly when the engine is started. If the light does not come on, have the vehicle serviced by your dealer ...

Liftgate
Power Liftgate Vehicles with an automatic transmission must be in P (Park) and a manual transmission must be in Neutral to operate the power liftgate. To open the liftgate from inside, s ...