2007 GMC Sierra 3500HD III (GMT900) Extended Cab Long Box: Front view of rugged pickup with prominent grille and extended cab

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Front view of a heavy-duty pickup truck displaying a chrome-accented grille with horizontal bars, large extended side mirrors, rectangular headlights with amber markers, and a robust wide front bumper with fog lights.

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

View 28 images of the 2007 GMC Sierra 3500HD III (GMT900) Extended Cab Long Box