2015 Chevrolet Silverado 3500 HD III (K2XX) Regular Cab Long Box Dimensions, Size & Specs

Curb weight of the 2015 Silverado 3500 HD III Regular Cab Long Box ranges from 2714 kg to 3394 kg (5985 to 7480 lbs), reflecting various equipment and drivetrain options. The maximum weight capacity (gross vehicle weight rating or GVWR) ranges from 4717 kg to 6123 kg (10,400 to 13,500 lbs), enabling it to handle heavy loads and towing requirements typical for heavy-duty pickups. This weight capacity allows it to compete effectively with other heavy-duty trucks in the class, offering strong performance in commercial and construction settings where hauling and payload strength are critical.

The ride height or ground clearance of the Silverado 3500 HD III Regular Cab Long Box ranges from 204 mm to 229 mm (8 to 9 inches). This clearance provides sufficient elevation to navigate rough terrains, obstacles, and uneven roads common in work sites or off-road conditions. While it’s not as high as specialized off-road vehicles, it balances on-road stability and off-road capability, making it suitable for a wide range of driving environments, including rural, construction, and forestry areas where off-road competence is necessary.

The Silverado 3500 HD III comes equipped with rims sized between 7.5J x 17 to 8J x 18 inches, paired with tire sizes of 235/80 R17 or 265/70 R18. These tire specifications provide a combination of durability and traction suitable for heavy-duty use. Larger rim and tire sizes contribute to better load capacity and improved handling characteristics, particularly under heavy payload or towing situations. These choices reflect the vehicle's design focus on rugged performance and reliability.

With the rear seats folded, the 2015 Silverado 3500 HD III offers a luggage capacity of approximately 2162 liters (about 76.4 cubic feet). While this figure usually applies more to passenger cars, for this Regular Cab Long Box configuration, the focus is often on the truck’s bed length (Long Box designation refers to a bed length of roughly 2.44 meters or 8 feet). This sizeable bed allows transportation of bulky items, tools, equipment, and other cargo, making it highly practical for commercial and industrial users requiring reliable cargo space.

Given its length of 5699 mm (224.3 inches) and width with mirrors folded at 2035 mm (80.1 inches), the 2015 Silverado 3500 HD III Regular Cab Long Box is quite large compared to typical passenger vehicles. Most standard residential garages have dimensions around 6 meters (20 feet) in length and 2.4 to 3 meters (8 to 10 feet) in width. While the truck’s length is close to garage length limits, the added width with mirrors open (up to 2438 mm or 96 inches) can make maneuvering tight. Owners typically find it fits physically into a standard garage with folded mirrors but requires careful handling due to size.

Compared to its predecessor, the Silverado 3500 HD II, the 2015 Silverado 3500 HD III (K2XX) generation saw modest dimensional growth and refinement. Length and width increased slightly to accommodate enhanced capability, improved interior space, and modern styling. The III generation introduced better load management and towing features, often accompanied by incremental increases in curb and gross vehicle weights. These changes improved functionality without compromising the ruggedness expected from the Silverado lineup. The difference is subtle but important for users needing top-tier heavy-duty performance with updated tech and durability.

The Chevrolet Silverado 3500 HD III Regular Cab Long Box stands competitive among heavy-duty pickups like the Ford F-350 Super Duty and Ram 3500 in terms of dimensions and capacities. Its length of 5699 mm (224.3 inches) and width range puts it in the upper size bracket, offering substantial bed space and cabin room depending on configuration. Maximum weight capacities of up to 6123 kg (13,500 lbs) align closely with rivals, making it an excellent choice for heavy towing and payload tasks. While exact features and dimensions vary, Silverado’s combination of size, powertrain options, and durability make it a compelling option in the HD segment.

The curb weight of 2714 to 3394 kg (5985 to 7480 lbs) determines how heavy the vehicle itself is without passengers or cargo, which affects fuel efficiency, handling, and wear on components. The maximum weight rating of 4717 to 6123 kg (10,400 to 13,500 lbs) defines the gross vehicle weight rating (GVWR), i.e., the total mass the truck can safely carry including passengers, cargo, and trailer tongue weight. This high rating underscores its design for serious heavy-duty applications like towing trailers, hauling heavy equipment, and commercial workloads, which are essential for industries demanding top-tier capability.

The 2015 Silverado 3500 HD III exhibits height variations between 1965 mm and 1979 mm (77.4 to 77.9 inches). These differences can arise due to optional equipment such as different tire sizes (235/80 R17 vs. 265/70 R18), suspension setups, and package choices that affect ride height. Additionally, aftermarket modifications or weight load conditions may influence the measured height. These slight variations do not drastically change handling or cargo capacity but are important to consider for clearance in garages, parking structures, and when off-road use is intended.