GMC Terrain: Sunroof - Roof - Keys, Doors, and Windows - GMC Terrain Owner's ManualGMC Terrain: Sunroof

On vehicles with a sunroof, the switches used to operate it are on the headliner above the rearview mirror. The ignition must be in ON/ RUN or ACC/ACCESSORY, or in Retained Accessory Power (RAP) to operate the sunroof. See Ignition Positions on page 9‑21 and Retained Accessory Power (RAP) on page 9‑25.

○ Press and hold the front or rear of the driver side switch to open or close

○ Press and hold the front or rear of the driver side switch to open or close the sunroof. The sunshade automatically opens with the sunroof, but must be closed manually.

○ Press and hold the rear of the passenger side switch to vent the sunroof. Press and hold the front of the switch to close.

Roof
...

Express-open/Express-close
Press and release the front or rear of the driver side switch to express-open or express-close the sunroof. ...

See also:

Problems with the occupant classification system
Problem The indicator lamp illuminates and remains illuminated. The person on the front-passenger seat: has the weight of a typical adult has been determined by the system not to be a child. ...

Advanced
In this mode, body sway in curves is minimal and steering response is very direct. Gear shifting is done at high rpm in each gear for dynamic and active driving. ...

Selecting a source for the rear screens from the front center control panel
An audio/video source for the rear screen(s) can be selected from the front center control panel. The same source can be selected for both rear screens or different sources can be selected for ...