2007 GMC Sierra 2500HD III (GMT900) Extended Cab Long Box: Close-up of engine bay with key engine components and accessories.

Detailed close-up view of an engine bay featuring an alternator, radiator hoses, battery, master cylinder, and air intake system with wiring and tubing for a truck.

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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