See also:

Using Automatic Mode
Press and release the button in the center of the switch and the Sky Slider™ will close automatically from any position. ...

Six-Speed Automatic Transmission (5.7L Engine) — If Equipped
The shift lever position display (located in the instrument panel cluster) indicates the transmission gear range. You must press the brake pedal to move the shift lever out of the PARK position ...

ACC Unavailable Warning
If the system turns off, and the EVIC displays “ACC/ FCW Unavailable, Vehicle System Error”, there may be a temporary malfunction that limits ACC functionality. Although the vehicle is still ...