2020 GMC Sierra 3500HD V (GMTT1XX) Double Cab Long Bed Dimensions, Size & Specs

The width of the 2020 GMC Sierra 3500HD V Double Cab Long Bed spans from 2079 mm (81.8 inches) when mirrors are folded to a wide 2457 mm (96.7 inches) when mirrors are extended, which can impact maneuverability, especially in narrow streets or tight parking spots. Drivers need to account for the extreme width while driving through urban areas or using parking structures, as the extended side mirrors increase the total width significantly. Collapsing mirrors can help reduce the width for easier access but careful attention during maneuvers remains crucial given the truck’s heavy-duty size.

The height of the GMC Sierra 3500HD V Double Cab Long Bed ranges between 2037 mm (80.2 inches) and 2054 mm (80.9 inches), with a ground clearance (ride height) varying from 264 mm (10.4 inches) to 284 mm (11.2 inches). This high ride height offers significant benefit when traversing off-road environments, allowing for better clearance over obstacles like rocks, mud, and uneven terrain. The ground clearance ensures the underbody is less likely to be damaged during off-road adventures, making it a highly capable truck in challenging conditions.

The curb weight of this GMC Sierra 3500HD V ranges between 3034 kg (6687 lbs) and 3713 kg (8185 lbs), depending on trim and equipment. This considerable weight supports a robust structure capable of towing heavy loads and carrying large payloads. The maximum weight (gross vehicle weight rating) is between 5035 kg (11,100 lbs) and 6350 kg (14,000 lbs), underscoring its heavy-duty utility role. The truck’s heavy curb weight correlates with superior stability and durability for demanding tasks, including commercial use and heavy hauling.

The 2020 GMC Sierra 3500HD V Double Cab Long Bed supports multiple tire and rim size configurations to suit various purposes, from rugged off-roading to on-road towing. Rim sizes include 7.5J x 17, 8J x 18, 8.5J x 18, and 8.5J x 20 inches. Corresponding tire sizes range from 265/70 R17, 245/75 R17, 275/70 R18, 235/80 R17, 265/70 R18, up to 265/60 R20. This flexibility allows owners to customize tire performance for specific conditions, balancing comfort, traction, and load capacity.

Given its length of 6514 mm (256.3 inches), width up to 2457 mm (96.7 inches) with mirrors open, and height up to 2054 mm (80.9 inches), the 2020 GMC Sierra 3500HD V Double Cab Long Bed generally exceeds the dimensions of most standard residential garages. A typical one-car garage often measures around 6 meters (20 feet) in length and 3 meters (10 feet) in width, making this truck too large for such spaces. Larger two-car or custom garages might accommodate it, but owners should measure their spaces carefully before attempting to park indoors to avoid damage.

Compared to its predecessor, the 2020 generation of the GMC Sierra 3500HD V Double Cab Long Bed features similar overall length and height but exhibits minor refinements in width and curb weight designed to optimize cabin space and payload. The length at 6514 mm (256.3 inches) remains consistent, ensuring ample cargo space with the long bed. The vehicle has seen improvements in ride height and ground clearance (up to 284 mm or 11.2 inches), enhancing off-road capabilities slightly. These refinements contribute to better maneuverability and load efficiency without drastically altering the truck’s footprint.

The 2020 GMC Sierra 3500HD V Double Cab Long Bed stacks up competitively against rivals like the Ford F-350 Super Duty and Ram 3500. Dimensionally, its length of 6514 mm (256.3 inches) and width (up to 2457 mm or 96.7 inches) are comparable, though some competitors may offer slightly varying bed lengths or cab configurations. With a maximum weight capacity up to 6350 kg (14,000 lbs), its towing and payload capacities are among the best in class. Its ride height and ground clearance put it on par with off-road capable heavy-duty pickups, offering a well-rounded balance of size, strength, and utility.

The Double Cab configuration of the 2020 GMC Sierra 3500HD V provides ample passenger room, accommodating up to six occupants depending on seating arrangements. The interior offers generous legroom and headroom for front and rear passengers, especially in the long bed variant which focuses on combining passenger comfort with significant cargo capacity. While exact interior dimensions vary by trim, the truck balances heavy-duty performance with a relatively spacious cabin suitable for work crews or family use.

The ride height (ground clearance) of the GMC Sierra 3500HD V Double Cab Long Bed ranges from 264 mm (10.4 inches) to 284 mm (11.2 inches), depending on suspension setup and load. This elevated clearance enhances off-road performance and improves visibility on the road. It also allows the truck to handle rough terrains, deep ruts, and obstacles with less risk of underbody damage. On paved roads, the ride height contributes to a commanding driving position, though it may result in a firmer ride typical of heavy-duty trucks. Overall, the ride height supports versatile driving needs from construction sites to highway cruising.