Roof
Sunroof
The ignition must be in ON/RUN or ACC/ACCESSORY to operate the sunroof and power sunshade.
See Retained Accessory Power (RAP) on page 9‑20.
The vehicle may have a sunroof over the front seats and a rear sunroof over the second row seats.
The rear sunroof does not open.

The switch to operate the front sunroof is on the headliner above the rearview mirror.
Vent: From the closed position, press and hold the front of the switch to vent the sunroof. Press and hold the rear of the switch to close the sunroof.
Express-open/Express-close:
From the closed position, press and release the rear of the switch to express-open the sunroof. Press and release the front of the switch to express-close the sunroof.
Manual Sunshade
The front sunshade must be opened and closed manually. To open the sunshade, press the button on the sunshade handle to release it and guide it back. To close the sunshade, pull the sunshade forward until it latches.

Dirt and debris may collect on the sunroof seal or in the track.
This could cause an issue with sunroof operation or noise.
It could also plug the water drainage system. Periodically open the sunroof and remove any obstacles or loose debris. Wipe the sunroof seal and roof sealing area using a clean cloth, mild soap, and water.
Do not remove grease from the sunroof.
See also:
English and Metric Unit Conversion
To change the display units between English and metric units, see Driver Information
Center (DIC) on page 5‑23 for more information. ...
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Powertrain details
The GMC Sierra All Terrain HD concept is propelled by the new, production
6.6L Duramax turbo-diesel V-8 and Allison 1000 six-speed automatic transmission
powertrain combination offered in the 2011 ...





