2007 GMC Sierra 2500HD III (GMT900) Crew Cab Long Box Dimensions, Size & Specs

The curb weight of the 2007 GMC Sierra 2500HD ranges between 2785 kg and 3115 kg (6139 to 6867 lbs), depending on specific configurations and optional equipment. Its maximum weight capacity, including payload and passengers (Gross Vehicle Weight Rating - GVWR), is rated at 4173 kg (9200 lbs). This high GVWR ensures the truck can handle demanding loads and towing tasks, making it suitable for work environments requiring robust vehicle performance and heavy hauling.

The 2007 GMC Sierra 2500HD III offers a ground clearance of 243 mm (9.6 inches), which is quite sufficient for a heavy-duty pickup truck. This generous ride height allows the vehicle to navigate rough terrains, off-road trails, and uneven surfaces without underbody damage. It provides enhanced approach and departure angles, improving the truck's capability in off-road conditions. Combined with robust suspension and chassis engineering, the ride height enables confident driving in rugged environments.

Given its dimensions—length of 6572 mm (258.7 inches), width of 2436 mm (95.9 inches) with mirrors open, and a height of 1930 mm (76 inches)—this truck may be challenging to fit into a typical residential garage, which usually ranges around 2.4 meters (8 feet) in width and 5.5 to 6 meters (18 to 20 feet) in length. The width, especially with mirrors extended, exceeds many standard garage door widths, and the length is significantly longer. Owners may need to fold the mirrors and ensure their garage is adequately sized or consider parking outdoors.

Compared to the second-generation Sierra 2500HD, the 2007 GMT900 generation Crew Cab Long Box is larger in most key dimensions, reflecting a trend toward bigger and more capable trucks. The length at 6572 mm (258.7 inches) and width at 2436 mm (95.9 inches) are increased, providing more interior space and a larger bed. The third generation also saw improvements in payload and towing capacity, complemented by stronger chassis and suspension setups. These enhancements represent GMC's effort to meet growing demands for durability, power, and versatility in heavy-duty pickups.

The 2007 GMC Sierra 2500HD III's size and weight are quite competitive within the heavy-duty pickup segment. Its length of 6572 mm (258.7 inches) and curb weight between 2785 and 3115 kg (6139 to 6867 lbs) place it alongside rivals such as the Ford F-250 Super Duty and Ram 2500. While all three trucks offer similar dimensions designed to balance cargo space, towing ability, and daily maneuverability, the Sierra's width with mirrors extended may be slightly wider due to its towing mirror design. Overall, its size supports robust capacities expected in this vehicle class.

With the rear seats folded, the 2007 GMC Sierra 2500HD III Crew Cab Long Box offers a luggage or interior cargo volume of approximately 2138 liters (about 75.5 cubic feet). This considerable space provides additional storage solutions inside the cab, allowing passengers to carry valuable or delicate items protected from the weather, in addition to the large exterior truck bed. The design optimizes flexibility for mixed-use scenarios, combining passenger comfort with practical cargo handling.

The truck is equipped with rims measuring 6.5J x 16 inches and 7.5J x 17 inches, paired with tire sizes of 245/75 R16 and 265/75 R17 respectively. These tire and rim combinations are designed to offer a balance of load-carrying capability, on-road comfort, and off-road durability. The larger 17-inch wheels with wider tires enhance stability and traction, especially under heavy loads or challenging terrain, while the 16-inch setup provides a comfortable ride and good durability. Together, these options support the vehicle's heavy-duty function.

The 2007 GMC Sierra 2500HD III Crew Cab features a roomy interior designed to accommodate up to six passengers comfortably, with ample headroom, legroom, and shoulder space. The larger crew cab configuration means rear passengers enjoy sufficient room even during long drives. The cabin is thoughtfully laid out to provide convenience and comfort, with ergonomic seats and quality materials. The ability to fold the rear seats adds versatility by increasing cargo space inside the cab, blending passenger comfort with practical cargo solutions.

The GMC Sierra 2500HD III (GMT900) generation gained a solid reputation for reliability, powering through demanding workloads in commercial, agricultural, and recreational settings. Owners valued its robust build, strong towing and payload capabilities, and durable drivetrain options. It is widely used for hauling heavy equipment, trailers, and large loads, making it a favorite among contractors and heavy-duty pickup buyers. While maintenance needs are typical for a truck of this size, the vehicle's strong engineering underscores its dependable nature in tough conditions.