GMC Logo2007 GMC Sierra 3500HD III (GMT900) Regular Cab Long Box: Side profile of a heavy-duty pickup with dual rear wheels and long cargo bed.

Side profile of a heavy-duty pickup with dual rear wheels and long cargo bed.

Side view of a heavy-duty pickup featuring a regular cab, extended long cargo bed, and dual rear wheels indicative of its enhanced load capacity and 4x4 capability.

View Dimensions of the 2007 GMC Sierra 3500HD III (GMT900) Regular Cab Long Box

View 28 images of the 2007 GMC Sierra 3500HD III (GMT900) Regular Cab Long Box

Small red car