Interior showcases a wood trim dashboard with integrated infotainment system, black leather seating, and a multifunction steering wheel in an enlarged cab layout.
View Dimensions of the 2011 GMC Sierra 2500HD III (GMT900, facelift 2011) Extended Cab Standard Box
View 19 images of the 2011 GMC Sierra 2500HD III (GMT900, facelift 2011) Extended Cab Standard Box