2008 GMC Sierra 1500 Pickup Owner's Manual - Page 135

Manual-Open/Manual-Close: To open the sunroof press and hold the rear of the driver's side switch until the sunroof reaches the desired position. To close the sunroof, press and hold the front of the driver's side switch until the sunroof reaches the desired position. When the sunroof is opened, an air deflector will automatically raise. The air deflector will retract when the sunroof is closed. Express-Open/Express-Close: To express-open the sunroof, fully press and release the rear of the driver's side switch. The sunroof will open automatically. To stop the sunroof partway, press the switch a second time. To express-close the sunroof, fully press and release the front of the driver's side switch. The sunroof will close automatically. To stop the sunroof partway, press the switch a second time. The sunroof also has a sunshade which you can pull forward to block sun rays. The sunshade must be opened and closed manually. Anti-Pinch Feature: If an object is in the path of the sunroof while it is closing, the anti-pinch feature will detect the object and stop the sunroof from closing at the point of the obstruction. The sunroof will then open halfway, and the air deflector will raise. To close the sunroof once it has re-opened, refer to the Express-Close or Manual-Close functions described previously. If the sunroof is in the vent position, and there is an object in the path of the sunroof when it closing, the anti-pinch feature will detect the object and stop the sunroof. To close the sunroof once it has re-opened, refer to the Manual-Close or Express-Close functions described previously. 2-59