GMC Logo2007 GMC Sierra 2500HD III (GMT900) Extended Cab Long Box: Rear view of pickup tailgate, taillights, trailer hitch, and exhaust pipe

Rear view of pickup tailgate, taillights, trailer hitch, and exhaust pipe

Close-up rear view showing pickup tailgate, prominently placed taillights, trailer hitch receiver, and exhaust pipe extending beyond rear wheel well.

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