2015 GMC Sierra 2500HD IV (GMTK2XX) Crew Cab Long Box Dimensions, Size & Specs

The curb weight for the GMC Sierra 2500HD IV Crew Cab Long Box ranges from approximately 2873 kg to 3456 kg (6336 to 7619 lbs), depending on configuration and equipment. The maximum weight capacity, which includes payload and total vehicle weight, lies between 4309 kg and 4536 kg (9497 to 10,000 lbs). These figures highlight the truck's capability for heavy-duty work, towing, and hauling, typical for a 3/4-ton heavy-duty pickup model.

The GMC Sierra 2500HD IV boasts a ride height or ground clearance ranging from 208 mm to 211 mm (8.2 to 8.3 inches). This ground clearance is suitable for off-road conditions, moderate trails, and rough terrain, providing enough height to navigate obstacles while maintaining stability. It is in line with expectations for a heavy-duty pickup, striking a balance between accessibility and rugged capability.

When the rear seats of the GMC Sierra 2500HD IV Crew Cab Long Box are folded, the interior cargo space is significantly expanded, offering a luggage capacity of approximately 2162 liters (76.3 cubic feet). This generous volume accommodates larger items inside the cab, beneficial for transporting tools, equipment, or bulky goods securely within the truck.

The GMC Sierra 2500HD IV featured a variety of rim sizes including 7.5J x 17, 8J x 18, 8.5J x 18, and 8.5J x 20. Correspondingly, tire sizes offered were 245/75 R17, 265/70 R17, 265/70 R18, 265/60 R20, and 235/80 R17. These options provide flexibility for different driving conditions and load requirements, balancing ride comfort, traction, and durability tailored for a heavy-duty truck.

Given its length of 6563 mm (258.4 inches) and width of 2045 mm (80.5 inches) with mirrors extended, the GMC Sierra 2500HD IV Crew Cab Long Box is generally too large to comfortably fit inside a standard residential garage. Most single-car garages are about 6 meters (20 feet) deep and 2.4 meters (8 feet) wide, which would be tight or insufficient for this truck. Owners with larger or custom garages, often found in rural or suburban homes, are better suited to accommodate this size of pickup.

Compared with its predecessor, the Sierra 2500HD GMTK1XX (2011-2014), the 2015-2019 GMC Sierra 2500HD IV Crew Cab Long Box generally retained similar exterior dimensions but introduced refinements in design and updated technology. The length and width remained close, but the newer generation improved payload capacity, towing capability, and interior comfort. Advanced safety and infotainment features also enhanced overall usability. While the size didn't drastically increase, engineering improvements delivered enhanced performance and capability for heavy-duty tasks.

In the heavy-duty pickup truck segment, the GMC Sierra 2500HD IV (2015-2019) stands out with its combination of robust construction, premium interior options, and strong towing/payload performance. When compared to competitors like the Ford F-250 Super Duty or RAM 2500, the Sierra generally matches or slightly edges out in terms of interior luxury and infotainment technology. Dimension-wise, it remains competitive: similar in length and width, but with specific strength in chassis durability and engine options, making it an excellent choice for users needing a mix of luxury and heavy-duty capability.

The Crew Cab Long Box configuration provides a spacious cabin with ample legroom and shoulder room for both front and rear passengers. This setup emphasizes passenger comfort, especially for long trips or work commutes, allowing five to six occupants to travel comfortably. High-quality materials and optional premium seating enhance the driving experience. The long box bed, although primarily for cargo, does not compromise interior cabin space, maintaining a practical balance between passenger comfort and utility.

Due to its large overall length of 6563 mm (258.4 inches) and width of 2045 mm (80.5 inches) with mirrors opened, plus a relatively high curb weight of up to 3456 kg (7619 lbs), maneuvering the Sierra 2500HD IV in tight or crowded urban environments can be challenging. Drivers should allow for extra space when parking, turning, or reversing. Utilizing available parking sensors, cameras, and driver assist systems can ease the process. Additionally, folding mirrors where possible and choosing parking spots with ample clearance are recommended to prevent damage and facilitate ease of movement.