See also:

Underbody Maintenance
Use plain water to flush dirt and debris from the vehicle's underbody. Your dealer or an underbody car washing system can do this. If not removed, rust and corrosion can develop. ...

Liftgate Release
To unlock the liftgate, use the power door lock switch or the remote keyless entry transmitter. The liftglass will also unlock when the liftgate is unlocked. Press the button on the liftglass to op ...

How OnStar Service Works
: This blue button connects you to a specially trained OnStar advisor to verify your account information and to answer questions. : Push this red emergency button to get priority help fro ...