2015 GMC Sierra 3500HD IV (GMTK2XX) Crew Cab Long Box Dimensions, Size & Specs

Production
Model Year:2015
Production Years:2015 - 2019 discontinued in 2019
1975 - 1983 mm77.8 - 78.1 in6.5 - 6.5 ft
6563 mm258.4 in21.5 ft
1975 - 1983 mm77.8 - 78.1 in6.5 - 6.5 ft
2045 - 2438 mm80.5 - 96.0 in6.7 - 8.0 ft
1975 - 1983 mm77.8 - 78.1 in6.5 - 6.5 ft
2045 - 2438 mm80.5 - 96.0 in6.7 - 8.0 ft
1975 - 1983 mm77.8 - 78.1 in6.5 - 6.5 ft
6563 mm258.4 in21.5 ft
1975 - 1983 mm77.8 - 78.1 in6.5 - 6.5 ft
2045 - 2438 mm80.5 - 96.0 in6.7 - 8.0 ft
1975 - 1983 mm77.8 - 78.1 in6.5 - 6.5 ft
2045 - 2438 mm80.5 - 96.0 in6.7 - 8.0 ft
Length
6563 mm258.4 in21.5 ft
Width
2045 - 2438 mm80.5 - 96.0 in6.7 - 8.0 ft
Height
1975 - 1983 mm77.8 - 78.1 in6.5 - 6.5 ft
Trunk Capacity
2162 liter76.4 cu ft
Technical Details

Exterior Dimensions

Precise measurements of the 2015 GMC Sierra 3500HD IV Crew Cab Long Box, engineered for optimal performance and comfort

Dimensions
Length:6563 mm258.4 in21.5 ft
Width (Opened Mirrors):2045 - 2438 mm80.5 - 96.0 in6.7 - 8.0 ft
Height:1975 - 1983 mm77.8 - 78.1 in6.5 - 6.5 ft
Ground Clearance:210 - 218 mm8.3 - 8.6 in0.7 - 0.7 ft
Trunk Capacity (Max):2162 liter76.4 cu ft
Weight Specifications
Curb Weight:2961 - 3661 kg6528 - 8071 lbs
Maximal permitted Weight:4853 - 5908 kg10699 - 13025 lbs
Tire Specifications
Rims Sizes:7.5J x 17, 8J x 18, 6.5J x 17
Tire Sizes:235/80 R17 (W:235 | H:80 | D:17)
265/70 R18 (W:265 | H:70 | D:18)
Useful Information

About 2015 GMC Sierra 3500HD IV Crew Cab Long Box

The 2015-2019 GMC Sierra 3500HD IV Crew Cab Long Box is a robust and capable full-size heavy-duty pickup truck designed to tackle demanding hauling and towing tasks. Produced on the GMTK2XX platform, this generation features a substantial size and rugged build that caters specifically to commercial and heavy-duty users. Measuring 6563 mm (258.4 inches) in length, the Sierra 3500HD IV offers ample space for cargo and passengers, making it an ideal choice for work and utility purposes. Its width varies between 2045 mm (80.5 inches) with mirrors folded and extends up to 2438 mm (96 inches) when mirrors are opened, accommodating wide loads and enhancing visibility during towing. The truck stands tall with a height range from 1975 mm (77.8 inches) to 1983 mm (78.1 inches), contributing to a commanding road presence and spacious cabin. The curb weight ranges from 2961 kg (6527 lbs) to 3661 kg (8070 lbs), reflecting the vehicle’s heavy-duty construction and equipment variations. It supports a maximum weight (gross vehicle weight rating) between 4853 kg (10,700 lbs) and 5908 kg (13,025 lbs), ensuring it can handle significant payloads and trailers. Under the interior convenience, the rear seats fold to provide an impressive luggage capacity of 2162 liters (76.3 cubic feet), enhancing its practicality for carrying tools and cargo. Ground clearance is maintained between 210 mm (8.3 inches) and 218 mm (8.6 inches), suitable for off-road conditions and uneven terrain often encountered in work sites. The Sierra 3500HD IV comes equipped with varied rim sizes including 7.5J x 17, 8J x 18, and 6.5J x 17, paired with tire options of 235/80 R17 and 265/70 R18 to balance ride comfort, traction, and load capacity. Overall, the 2015-2019 GMC Sierra 3500HD IV Crew Cab Long Box is a formidable pickup that blends substantial size, strength, and capability, making it a preferred choice for drivers needing serious hauling power combined with crew cab practicality.

Exceptional Features

2015 GMC Sierra 3500HD IV Crew Cab Long Box Highlights

Discover the standout features that make the 2015 GMC Sierra 3500HD IV Crew Cab Long Box a leader in its class

Powerful Engine Options

The 2015 GMC Sierra 3500HD offers robust engine choices, including a 6.0L V8 gasoline engine and a 6.6L Duramax Turbo-Diesel V8, delivering impressive towing and payload capabilities.

Heavy-Duty Towing and Payload Capacity

Designed for heavy-duty tasks, the Sierra 3500HD can tow up to around 23,100 pounds and handle significant payloads, making it ideal for work and hauling applications.

Crew Cab Long Box Configuration

The Crew Cab Long Box layout provides spacious seating for up to six passengers and a longer cargo bed for enhanced utility and versatility.

Advanced Safety and Technology Features

Equipped with key safety features such as hill start assist, trailer sway control, and available rearview camera, along with tech options like an infotainment system with Bluetooth connectivity.

Robust and Durable Chassis

Built on the GMTK2XX platform, the truck features a reinforced frame and suspension system designed to endure demanding work environments and provide reliable performance.
Frequently Asked Questions

FAQ

Have a question? Please check our knowledgebase first.

The 2015-2019 GMC Sierra 3500HD IV Crew Cab Long Box measures 6563 mm (258.3 inches) in length, making it a substantial full-size pickup truck ideal for heavy-duty tasks. The width with mirrors open ranges between 2045 mm to 2438 mm (80.5 to 96 inches), reflecting its broad stance for stability and road presence. Its height varies from 1975 mm to 1983 mm (77.8 to 78.1 inches), contributing to its commanding view and off-road capability. These dimensions combine to create a powerful, spacious truck well-suited to commercial and personal heavy hauling needs.

The curb weight of the GMC Sierra 3500HD IV Crew Cab Long Box ranges from 2961 kg to 3661 kg (6529 to 8076 lbs), depending on configurations and options. This indicates a robust construction capable of carrying a heavy payload and towing loads. The maximum weight, also known as the Gross Vehicle Weight Rating (GVWR), falls between 4853 kg and 5908 kg (10,700 to 13,025 lbs), underscoring its heavy-duty classification. This high GVWR allows the truck to handle substantial trailer weights and cargo, making it an excellent choice for demanding work environments.

This generation of the GMC Sierra 3500HD has a width of 2045 mm (80.5 inches) without mirrors extended, allowing easier maneuvering in tighter spaces like parking lots or narrow roads. With mirrors open, the width extends to 2438 mm (96 inches), which ensures better visibility and safety during driving but requires more lateral clearance. This difference highlights the importance of accounting for mirror position when parking or driving in narrow conditions.

The ground clearance of the GMC Sierra 3500HD IV Crew Cab Long Box ranges between 210 mm and 218 mm (8.3 to 8.6 inches), providing advantageous off-road capabilities and protection when navigating uneven terrain or rough surfaces. This clearance is sufficient for a heavy-duty pickup truck, ensuring it can handle rugged environments while maintaining a stable ride on paved surfaces.

When the rear seats are folded down, the GMC Sierra 3500HD IV Crew Cab Long Box offers up to 2162 liters (76.3 cubic feet) of cargo capacity inside the cabin area, in addition to its large long-bed cargo box. This volume makes it extremely versatile for carrying large items that require indoor space or added protection from the elements, complementing its capability as a workhorse truck.

A standard residential garage typically measures about 6000 mm (approximately 20 feet) in length and about 3000 mm (10 feet) in width. Since the GMC Sierra 3500HD IV Crew Cab Long Box is 6563 mm (258.3 inches) long, it will generally not fit comfortably in a typical garage due to its length exceeding the common garage dimension by roughly 563 mm (over 22 inches). Width can also be an issue with mirrors extended to 2438 mm (96 inches). This truck is more suited for large garages or outdoor parking areas.

Compared to its predecessor, the GMC Sierra 3500HD III, the 2015-2019 Sierra 3500HD IV Crew Cab Long Box is slightly larger in several dimensions. The newer generation is longer and a bit wider, offering improved interior space and cargo capabilities, while also benefiting from updated engineering and modernized styling. These changes allocate greater comfort for occupants, enhanced payload and towing capacities, and refined handling despite its increased size.

When compared to similar heavy-duty pickups like the Ford F-350 Super Duty and Ram 3500 Crew Cab long bed variants, the GMC Sierra 3500HD IV is competitive in size. Its length of 6563 mm (258.3 inches) is roughly in line with the Ford F-350, though slightly longer than many Ram 3500 configurations. Width and height figures with mirrors open and ride height are also comparable, positioning the Sierra 3500HD as a robust and spacious truck in its heavy-duty class. Buyers typically choose among these models based on brand preference, powertrain options, and available features rather than dramatic size differences.

The GMC Sierra 3500HD IV Crew Cab Long Box was equipped with a range of rim sizes from 7.5J x 17 to 8J x 18 and 6.5J x 17, matched with tire sizes including 235/80 R17 and 265/70 R18. These combinations reflect the truck's emphasis on durability and capability, balancing load carrying capacity with ride comfort and traction. These wheel and tire options allow different configurations depending on the intended use, such as heavy load hauling or on-road comfort.

The 2015-2019 GMC Sierra 3500HD IV Crew Cab Long Box introduced refined styling with a more aggressive front fascia and updated grille design, integrating modern LED lighting and aerodynamic enhancements. Functionally, it offers improved towing technology, stronger frame construction, and more advanced safety and driver assistance features than previous generations. Inside, the cabin focuses on increased comfort, connectivity, and convenience with up-to-date infotainment and higher quality materials. These improvements make the fourth-generation Sierra 3500HD a standout heavy-duty pickup offering both strength and modern refinement.

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