2007 GMC Sierra 1500 III (GMT900) Regular Cab Long Box in White Diamond Tricoat: Front and side view of a 2007 full-size pickup truck with Regular Cab and Long Box.

Front and side view of a 2007 full-size pickup truck with Regular Cab and Long Box.

Image showcasing the front grille, headlights, side mirrors, alloy wheels, and extended cargo bed of a full-size pickup truck with a Regular Cab and Long Box configuration.

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

View 23 images of the 2007 GMC Sierra 1500 III (GMT900) Regular Cab Long Box