GMC Logo2007 GMC Sierra 3500HD III (GMT900) Crew Cab Long Box in Onyx Black: Heavy-duty pickup truck with crew cab, long box, dual rear wheels, and 4x4.

Heavy-duty pickup truck with crew cab, long box, dual rear wheels, and 4x4.

Black heavy-duty pickup truck with crew cab and extended long box, featuring dual rear wheels for extra load capacity and 4x4 drive capability for off-road and tough terrain performance.

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

View 30 images of the 2007 GMC Sierra 3500HD III (GMT900) Crew Cab Long Box

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