GMC Logo2011 GMC Sierra 2500HD III (GMT900, facelift 2011) Extended Cab Long Box: Extended cab long box pickup truck side profile with chrome accents.

Extended cab long box pickup truck side profile with chrome accents.

A clean white extended cab long box pickup truck shown from the side, highlighting chrome door handles, tinted rear window, and metallic five-spoke wheels.

View Dimensions of the 2011 GMC Sierra 2500HD III (GMT900, facelift 2011) Extended Cab Long Box

View 21 images of the 2011 GMC Sierra 2500HD III (GMT900, facelift 2011) Extended Cab Long Box

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Small red car