2020 GMC Sierra 2500HD V (GMTT1XX) Regular Cab Long Bed Dimensions, Size & Specs

This generation of the GMC Sierra 2500HD has a curb weight ranging from 2769 to 3303 kg (6103 to 7282 lbs), depending on specific trims and equipment. The maximum weight capacity (gross vehicle weight rating) is between 4536 and 4944 kg (10,000 to 10,900 lbs). This weight capability reflects the truck’s robust chassis and suspension design, suitable for demanding towing and payload tasks typical for heavy-duty pickups.

The Sierra 2500HD Regular Cab Long Bed offers a ground clearance of 259 mm (10.2 inches). This relatively high ride height allows the truck to navigate rough terrain and off-road obstacles more effectively, providing better approach and departure angles. The 259 mm clearance also reduces the risk of undercarriage damage when driving on uneven surfaces, making it a practical choice for both work environments and off-road enthusiasts.

This truck generation supports a variety of tire and rim configurations to suit different driving needs. Standard and optional rim sizes include 7.5J x 17, 8J x 18, 8.5J x 18.5, and 8.5J x 20 inches. Corresponding tire sizes available range from 235/80 R17, 265/70 R17, 245/75 R17, 265/70 R18, 265/60 R20 to 275/70 R18. This versatility allows owners to customize their vehicle for enhanced off-road traction or highway comfort.

With a width of 2076 mm (81.7 inches) including mirrors, height of 2030 mm (79.9 inches), and notable length of 5982 mm (235.4 inches), the Sierra 2500HD V Regular Cab Long Bed approaches the upper limits of what many standard residential garages can accommodate. Typical garage doors are about 2,438 mm (96 inches) wide and 2,134 mm (84 inches) tall, so while height clearance is generally sufficient, the width with mirrors and especially the length may pose challenges in tight garages. Owners with average residential garages might need to carefully maneuver or may find the truck better suited to larger garage spaces or outdoor parking.

Compared to the previous generation, the 2020 Sierra 2500HD V Regular Cab Long Bed features increased dimensions, reflecting an evolution toward greater functional capacity. The length and width have grown modestly to improve cargo bed length and interior space, while overall height is maintained to balance aerodynamics and clearance. Weight has also increased, contributing to enhanced durability and capability. These size increments support improved towing and payload performance, aligning with customer demand for more robust heavy-duty trucks.

When compared to similar heavy-duty pickups like the Ford F-250 Super Duty and Ram 2500, the Sierra 2500HD V Regular Cab Long Bed is very competitive in size. Its length of nearly 6 meters (19.6 feet) and width close to 2.08 meters (6.8 feet) place it comfortably in the large pickup category. While Ford and Ram models have comparable lengths and widths, the GMC truck stands out with a slightly higher curb weight due to its build, which can translate to enhanced stability and payload capacity. Each model balances size with functional capacity tailored to towing and hauling demands.

The 2020 Sierra 2500HD V represents a modern, aggressive design with bold grille aesthetics, muscular body lines, and high-strength steel frames built for durability. The regular cab with the long bed configuration maximizes cargo space, catering to users who prioritize payload capacity and straightforward utility. Functional design elements include aerodynamic shaping to improve fuel efficiency, integrated corner steps for bed access, and durable materials to withstand rugged use. These features enhance both the truck’s utility and visual appeal.

The 2020 Sierra 2500HD is often equipped with powerful engine options, including a 6.6-liter V8 gasoline engine and a Duramax 6.6-liter turbo-diesel V8, designed to deliver high torque and horsepower figures. These engines enable the truck to achieve impressive towing capacities often exceeding 7,800 kg (17,200 lbs) depending on configuration. Coupled with advanced towing technologies such as trailer sway control, hill start assist, and integrated brake controllers, the truck is well-suited for heavy towing tasks demanded by commercial users and enthusiasts alike.

Though configured as a regular cab, the 2020 Sierra 2500HD still offers a driver-focused cabin with durable materials designed to withstand heavy-duty use. It features available technology such as infotainment systems with touchscreen displays, smartphone integration, and advanced driver assistance features. Seating is typically utilitarian but comfortable, with options for cloth or premium materials. The interior layout prioritizes functionality, with adequate storage compartments and controls accessible to support work-related tasks with ease.