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

Production
Model Year:2015
Production Years:2015 - 2019 discontinued in 2019
1976 mm77.8 in6.5 ft
5699 mm224.4 in18.7 ft
1976 mm77.8 in6.5 ft
2035 mm80.1 in6.7 ft
1976 mm77.8 in6.5 ft
2035 mm80.1 in6.7 ft
1976 mm77.8 in6.5 ft
5699 mm224.4 in18.7 ft
1976 mm77.8 in6.5 ft
2035 mm80.1 in6.7 ft
1976 mm77.8 in6.5 ft
2035 mm80.1 in6.7 ft
Length
5699 mm224.4 in18.7 ft
Width
2035 mm80.1 in6.7 ft
Height
1976 mm77.8 in6.5 ft
Trunk Capacity
2160 - 2162 liter76.3 - 76.4 cu ft
Technical Details

Exterior Dimensions

Precise measurements of the 2015 GMC Sierra 2500HD IV Regular Cab Long Box, engineered for optimal performance and comfort

Dimensions
Length:5699 mm224.4 in18.7 ft
Width (Opened Mirrors):2035 mm80.1 in6.7 ft
Height:1976 mm77.8 in6.5 ft
Ground Clearance:231 mm9.1 in0.8 ft
Trunk Capacity (Max):2160 - 2162 liter76.3 - 76.4 cu ft
Weight Specifications
Curb Weight:2604 - 2993 kg5741 - 6598 lbs
Maximal permitted Weight:4218 - 4536 kg9299 - 10000 lbs
Tire Specifications
Rims Sizes:7.5J x 17, 8J x 18, 8.5J x 20, 8J x 20
Tire Sizes:245/75 R17 (W:245 | H:75 | D:17)
265/70 R17 (W:265 | H:70 | D:17)
265/70 R18 (W:265 | H:70 | D:18)
265/60 R20 (W:265 | H:60 | D:20)
235/80 R17 (W:235 | H:80 | D:17)
Useful Information

About 2015 GMC Sierra 2500HD IV Regular Cab Long Box

The GMC Sierra 2500HD IV (GMTK2XX) Regular Cab Long Box, produced from 2015 to 2019, is a robust heavy-duty pickup truck designed for demanding work and hauling needs. This generation combines powerful performance with substantial cargo capacity and a commanding road presence. It measures 5699 mm (224.4 inches) in length, making it a sizeable vehicle built to accommodate large loads. With a width of 2035 mm (80.1 inches) including opened mirrors, the truck offers excellent stability and a wide stance. Its height ranges from 1975 to 1976 mm (77.8 to 77.8 inches), contributing to its imposing and muscular design.

The curb weight of the Sierra 2500HD IV ranges between 2604 kg and 2993 kg (5740 to 6598 lbs), reflecting the heavy-duty components and reinforced chassis needed for its tough tasks. Its maximum weight capacity varies from 4218 kg to 4536 kg (9300 to 10,000 lbs), highlighting its capability to carry and tow substantial loads with ease. The pickup’s ground clearance stands at 231 mm (9.1 inches), allowing it to tackle rough terrain while maintaining stability on highways and job sites.

Cargo space is generous with rear seats folded, offering a luggage capacity between 2160 and 2162 liters (76.3 to 76.4 cubic feet), enabling users to transport bulky equipment and materials efficiently. The Sierra 2500HD IV supports various rim sizes from 7.5J x 17 inches up to 8J x 20 inches, paired with tire sizes including 245/75 R17 and 265/60 R20, allowing customization for different driving conditions and load requirements.

Overall, the 2015-2019 GMC Sierra 2500HD IV Regular Cab Long Box is a versatile and capable pickup truck that delivers heavy-duty performance along with substantial size, weight, and cargo versatility, making it an ideal choice for professionals who require durability and power in a full-size pickup.

Exceptional Features

2015 GMC Sierra 2500HD IV Regular Cab Long Box Highlights

Discover the standout features that make the 2015 GMC Sierra 2500HD IV Regular Cab Long Box a leader in its class

Powerful Engine Options

The 2015 GMC Sierra 2500HD offers a range of powerful engine options including a 6.0L V8 gasoline engine and a 6.6L Duramax Turbo-Diesel V8, delivering strong towing and hauling capabilities.

Heavy-Duty Towing Capacity

With its robust frame and engine options, the Sierra 2500HD is capable of towing up to approximately 14,500 lbs, making it suitable for heavy-duty tasks and commercial use.

Regular Cab Long Box Configuration

This model features a Regular Cab with a Long Box bed, providing ample cargo space for larger loads while maintaining a straightforward and durable design.

Advanced Safety Features

Standard and available safety features include stability control, trailer sway control, front and side airbags, and antilock brakes, enhancing driver and passenger protection.

Interior Comfort and Utility

The cabin is designed with durable materials for worksite use, and offers options such as air conditioning, cruise control, and available infotainment systems to enhance comfort and convenience.
Frequently Asked Questions

FAQ

Have a question? Please check our knowledgebase first.

The 2015-2019 GMC Sierra 2500HD IV Regular Cab Long Box measures 5699 mm (224.3 inches) in length, 2035 mm (80.1 inches) in width with mirrors opened, and has a height that ranges between 1975 mm to 1976 mm (77.8 to 77.8 inches). These dimensions make it a substantial full-size pickup truck designed to provide ample cargo and towing capacity while maintaining a commanding presence on the road.

The GMC Sierra 2500HD IV Regular Cab Long Box offers a generous luggage capacity of approximately 2160 to 2162 liters (about 76.3 to 76.4 cubic feet) with the rear seats folded. Given this is a Regular Cab Long Box configuration, the bed itself is long and ideal for carrying large and heavy loads, making it well-suited for heavy-duty tasks such as construction, hauling tools, materials, and other equipment.

This generation of the GMC Sierra 2500HD Regular Cab Long Box has a curb weight ranging between 2604 kg to 2993 kg (about 5739 to 6599 pounds). The maximum gross vehicle weight rating (GVWR), which includes the vehicle, passengers, cargo, and trailer tongue weight, ranges between 4218 kg to 4536 kg (9300 to 10,000 pounds). This weight capacity ensures the truck is capable of heavy-duty towing and hauling, making it a robust choice for demanding work environments.

The GMC Sierra 2500HD IV Regular Cab Long Box features a ground clearance (ride height) of 231 mm (approximately 9.1 inches). This generous ground clearance improves the vehicle’s ability to navigate uneven terrains, obstacles, and off-road conditions without damaging the undercarriage. It provides an advantage for users who require a pickup truck capable of off-road work or travel on rugged construction sites and rural environments.

The truck, with a height of around 1975 mm (77.8 inches) and width including mirrors of 2035 mm (80.1 inches), could be a tight fit for many standard residential garages, which commonly have door widths of approximately 2440 mm (96 inches) and interior heights of around 2130 mm (84 inches). While the height is generally suitable, the width with mirrors opened may require mirror folding or careful maneuvering. Therefore, it fits in many garages but might be challenging in smaller or custom garages without adequate space.

Compared to the previous GMC Sierra 2500HD generation, the fourth-generation (GMTK2XX) Regular Cab Long Box maintains very similar overall length and height dimensions, with slight refinements in styling and structure that impact aerodynamics and interior space. The curb weight generally increased slightly due to upgraded materials and technology integration, supporting increased towing and payload capacities. Width with mirrors remains comparably wide, sustaining its full-sized and utilitarian nature. Overall, this generation improved fuel efficiency and modernized drivetrain options while retaining the familiar large truck footprint.

Within its class of heavy-duty pickups, the GMC Sierra 2500HD IV Regular Cab Long Box holds competitive exterior dimensions and weight. For example, when compared with the Ford F-250 Super Duty of similar years, the GMC is slightly longer (5699 mm vs. about 5867 mm / 224.3 inches vs. 231 inches for Ford) but similar in height and width. Its curb weight is also within the competitive range, offering robust towing and hauling capabilities. This makes the Sierra 2500HD a strong contender in the segment, balancing bulk with utility.

The truck comes with multiple rim sizes including 7.5J x 17, 8J x 17, 8J x 18, 8.5J x 20, and 8J x 20 inches, paired with tire sizes such as 245/75 R17, 265/70 R17, 265/70 R18, 265/60 R20, and 235/80 R17. The variety of tire and rim configurations allows for adjustment depending on use case—larger rims and lower profile tires improve road handling and aesthetics, while smaller rims with higher profile tires provide better cushioning and off-road durability. This versatility lets owners tailor fitment for highway comfort or rugged terrain performance.

Building on its curb weight of 2604 to 2993 kg (5739 to 6599 pounds) and GVWR up to 4536 kg (10,000 pounds), the GMC Sierra 2500HD IV Regular Cab Long Box is engineered for substantial payload and towing tasks. Payload capacity typically ranges from approximately 1000 kg to 1300 kg (2200 to 2860 pounds), depending on equipment and configuration. Towing capacity varies widely with engine choice and specifications but can reach over 6800 kg (15,000 pounds) for trailers, making this model ideal for heavy-duty commercial and personal hauling needs.

The Regular Cab Long Box of the 2015-2019 GMC Sierra 2500HD IV configuration focuses primarily on utility with limited passenger capacity. Featuring a single row of seating, it typically accommodates two to three occupants, offering straightforward functional interior space optimized for work purposes. While lacking rear passenger cabins, its interior incorporates durable materials and ergonomically placed controls to improve driver comfort. Compared to extended cabs or crew cabs, it sacrifices passenger volume but gains in longer cargo bed length and generally lower weight.

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