GMC Logo2007 GMC Sierra 2500HD III (GMT900) Extended Cab Long Box: Extended cab pickup truck with long cargo bed, side view

Extended cab pickup truck with long cargo bed, side view

Side profile of an extended cab pickup truck showing four doors and an extended cargo bed, highlighting the wheel design, door handles, and rear light cluster.

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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Small red car