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:

If the engine fails to start
Note: If the engine fails to crank when the START/STOP button is pressed and there has been a recent collision, seek qualified assistance. If the engine fails to crank, or fails to start, consult ...

Injured persons
NISSAN recommends that injured persons use seat belts, depending on the injury. Check with your doctor for specific recommendations. ...

Rain Sensing Wipers — If Equipped
This feature senses moisture on the windshield and automatically activates the wipers for the driver. This feature is especially useful for road splash or overspray from the windshield washers o ...