GMC Logo2007 GMC Sierra 2500HD III (GMT900) Extended Cab Long Box in Stealth Gray Metallic: Side profile of extended cab pickup with long box and rugged features.

Side profile of extended cab pickup with long box and rugged features.

Side view of a full-size extended cab pickup truck featuring a long cargo bed, robust wheels, and a strong, boxy design indicative of heavy-duty utility vehicles.

View Dimensions of the 2007 GMC Sierra 2500HD III (GMT900) Extended Cab Long Box

View 39 images of the 2007 GMC Sierra 2500HD III (GMT900) Extended Cab Long Box

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