2011 GMC Sierra 2500HD III (GMT900, facelift 2011) Extended Cab Long Box Dimensions, Size & Specs

Production
Model Year:2011
Production Years:2011 - 2014 discontinued in 2014
1971 mm77.6 in6.5 ft
6337 mm249.5 in20.8 ft
1971 mm77.6 in6.5 ft
2032 mm80.0 in6.7 ft
1971 mm77.6 in6.5 ft
2032 mm80.0 in6.7 ft
1971 mm77.6 in6.5 ft
6337 mm249.5 in20.8 ft
1971 mm77.6 in6.5 ft
2032 mm80.0 in6.7 ft
1971 mm77.6 in6.5 ft
2032 mm80.0 in6.7 ft
Length
6337 mm249.5 in20.8 ft
Width
2032 mm80.0 in6.7 ft
Height
1971 mm77.6 in6.5 ft
Trunk Capacity
2138 liter75.5 cu ft
Technical Details

Exterior Dimensions

Precise measurements of the 2011 GMC Sierra 2500HD III Extended Cab Long Box, engineered for optimal performance and comfort

Dimensions
Length:6337 mm249.5 in20.8 ft
Width (Opened Mirrors):2032 mm80.0 in6.7 ft
Height:1971 mm77.6 in6.5 ft
Ground Clearance:214 - 216 mm8.4 - 8.5 in0.7 - 0.7 ft
Trunk Capacity (Max):2138 liter75.5 cu ft
Weight Specifications
Curb Weight:2786 - 3300 kg6142 - 7275 lbs
Maximal permitted Weight:4309 - 4536 kg9500 - 10000 lbs
Tire Specifications
Rims Sizes:7.5J x 17, 8J x 18, 8.5J 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)
Useful Information

About 2011 GMC Sierra 2500HD III Extended Cab Long Box

The 2011 GMC Sierra 2500HD III (GMT900 facelift 2011) Extended Cab Long Box represents a robust heavy-duty pickup truck from GMC's third-generation Sierra 2500HD lineup, produced between 2011 and 2014. This model is designed to meet both commercial and personal heavy-duty hauling needs, combining durability with a spacious cabin and cargo bed.

In terms of dimensions, the Sierra 2500HD Extended Cab Long Box measures an impressive 6337 mm (249.5 inches) in length, allowing for ample cargo space in the long box configuration. Its width, measured including opened mirrors, is 2032 mm (80 inches), providing a wide stance for increased stability on and off-road. The vehicle stands at a height of 1971 mm (77.6 inches), contributing to a commanding road presence while maintaining practical maneuverability.

The curb weight of the truck ranges from 2786 to 3300 kg (6139 to 7275 lbs), reflecting the substantial build and heavy-duty materials used in its construction. It supports a maximum weight between 4309 and 4536 kg (9500 to 10,000 lbs), underlining its capability for towing and payload. The rear cargo space, especially with rear seats folded, opens up a generous 2138 liters (75.5 cubic feet) of luggage capacity, making it highly functional for transporting bulky equipment and goods.

Ground clearance is robust, with a ride height ranging from 214 to 216 mm (8.4 to 8.5 inches), ensuring competence on rough terrain and off-road conditions. The wheel setup ranges through several rim sizes: 7.5J x 17, 8J x 18, 8.5J x 18, and 8.5J x 20, fitted with tires of various sizes including 245/75 R17, 265/70 R17, 265/70 R18, and 265/60 R20, providing options for different driving demands and environments.

Overall, the 2011 GMC Sierra 2500HD III Extended Cab Long Box is a highly capable pickup truck with a balance of size, power, and utility suited for heavy-duty applications. It offers significant cargo space and ruggedness, making it a solid choice for those needing serious hauling and towing with the versatility of an extended cab.

Exceptional Features

2011 GMC Sierra 2500HD III Extended Cab Long Box Highlights

Discover the standout features that make the 2011 GMC Sierra 2500HD III Extended Cab Long Box a leader in its class

Robust Powertrain Options

The 2011 GMC Sierra 2500HD Extended Cab Long Box is equipped with powerful engine choices, including a standard 6.0L V8 gasoline engine and an available 6.6L Duramax turbo-diesel V8, delivering exceptional towing and hauling capabilities.

Heavy-Duty Chassis and Suspension

Designed for demanding tasks, this model features a reinforced chassis and heavy-duty suspension components, providing enhanced durability and stability for off-road and heavy-load conditions.

Spacious Extended Cab with Long Box

The Extended Cab configuration offers additional rear seating space, while the Long Box provides increased cargo capacity, making it ideal for both passenger comfort and practical storage needs.

Advanced Safety Features

Safety is enhanced through features such as stability control, antilock brakes, front and side airbags, and trailer sway control, ensuring driver and passenger protection during towing and hauling.

Facelifted Exterior Design

The 2011 facelift includes updated exterior styling elements such as a revised grille, headlamps, and bumpers, giving the Sierra 2500HD a modern and aggressive appearance.
Frequently Asked Questions

FAQ

Have a question? Please check our knowledgebase first.

The GMC Sierra 2500HD III (GMT900 facelift 2011) Extended Cab Long Box has an overall length of 6337 mm (249.4 inches), a width with opened mirrors of 2032 mm (80 inches), and a height of 1971 mm (77.6 inches). These dimensions make it a large full-size pickup truck designed for heavy-duty tasks and spacious interior accommodations.

The curb weight of this GMC Sierra 2500HD ranges between 2786 kg (6,143 lbs) and 3300 kg (7,275 lbs), depending on the specific configuration and options installed. This weight reflects the truck's heavy-duty capabilities, robust construction, and equipment, balancing durability and towing power.

The maximum weight capacity, or Gross Vehicle Weight Rating (GVWR), for the GMC Sierra 2500HD III Extended Cab Long Box varies from 4309 kg (9,493 lbs) to 4536 kg (10,000 lbs). This high GVWR enables the truck to carry heavy loads and tow substantial trailers, making it well-suited for commercial and towing applications.

This model offers a ride height or ground clearance between 214 mm (8.4 inches) and 216 mm (8.5 inches). This clearance provides good off-road capability and allows the truck to handle rough terrain and obstacles more effectively, which is an important feature for a heavy-duty pickup.

When the rear seats are folded down, the GMC Sierra 2500HD Extended Cab Long Box offers a generous luggage capacity of 2138 liters (75.4 cubic feet). This substantial cargo space is ideal for transporting large items and equipment, further enhancing the truck's utility.

Given its length of 6337 mm (249.4 inches) and width of 2032 mm (80 inches) with mirrors extended, the GMC Sierra 2500HD III Extended Cab Long Box is quite large. Most standard residential garages are approximately 6 meters (20 feet) deep and about 2.4 meters (8 feet) wide, which may be too small to comfortably fit this truck, especially considering mirror width and door clearance. Owners typically require larger or custom garages or parking solutions for storage.

Compared to its predecessor, the GMT800 generation, the GMT900 facelift (2011) Extended Cab Long Box model of the Sierra 2500HD is larger and offers improved capabilities. The length increased slightly to 6337 mm (249.4 in), providing more interior and cargo space. Weight capacities were also enhanced, with curb weight ranging from about 2786 to 3300 kg (6143 to 7275 lbs) and maximum weight capacity up to 4536 kg (10,000 lbs). The facelift introduced design and mechanical refinements that improved towing, payload, and driver comfort, marking a notable advancement from the prior generation.

The GMC Sierra 2500HD III Extended Cab Long Box is competitive with similar heavy-duty pickups such as the Ford F-250 Super Duty and Ram 2500 models of the same era. Dimension-wise, the Sierra's length at 6337 mm (249.4 in) and width of 2032 mm (80 in) is comparable, though variations exist based on cab style and bed length. Payload and towing capacities are also similar, with all targeting heavy-duty work and commercial use. The Sierra offers rugged build quality, multiple rim and tire options for versatility, and high ground clearance (214-216 mm / 8.4-8.5 in), which is on par with competitors. Ultimately, the choice often comes down to specific feature preferences, brand loyalty, and regional availability.

This generation of the GMC Sierra 2500HD Extended Cab Long Box supports several rim sizes to suit different driving needs. Rim sizes offered include 7.5J x 17, 8J x 18, 8.5J x 18.5, and 20 inches (20J). Corresponding tire sizes include 245/75 R17, 265/70 R17, 265/70 R18, and 265/60 R20. These options provide a balance of ride comfort, off-road capability, and load handling depending on user preference and installation.

The GMC Sierra 2500HD III Extended Cab Long Box is a heavy-duty full-size pickup truck produced from 2011 to 2014. It belongs to the GMT900 platform facelift and is designed primarily for demanding tasks such as towing large trailers and hauling heavy loads. Its extended cab configuration offers additional seating behind the front row while the long box provides significant cargo bed length, making it a highly versatile work truck for commercial and private use.

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