GMC Logo2007 GMC Sierra 1500 III (GMT900) Extended Cab Long Box in Onyx Black: Front angle view of pickup truck with extended cab and long box

Front angle view of pickup truck with extended cab and long box

Pickup truck front angle showing distinctive grille, headlamps, side mirrors, extended cab four-door design, and long cargo box rear in black finish.

View Dimensions of the 2007 GMC Sierra 1500 III (GMT900) Extended Cab Long Box

View 24 images of the 2007 GMC Sierra 1500 III (GMT900) Extended Cab Long Box

Small red car