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:

Battery Saver Feature
To protect the battery, the interior lights will turn off automatically 10 minutes after the ignition switch is moved to the LOCK position. This will occur if the interior lights were switched o ...

Using The Panic Alarm
NOTE: The PANIC and Security Alarms are quite different. Please take a moment to activate the PANIC and the Security modes to hear the differences in the horn. In case one should go off in the f ...

Exterior
To adjust the mirrors: 1. Move the selector switch to L (left) or R (right) to choose the driver or passenger mirror. 2. Press the arrows on the control pad to move each mirror in the desired di ...