2022 GMC Sierra 2500HD Single Cab: Specs & Key Features

The 2022 GMC Sierra 2500HD Single Cab is the workhorse you reach for when you need raw pulling power without the extra passenger space of a crew‑cab. It blends a muscular chassis with a suite of modern conveniences, making it a capable partner for both job sites and weekend projects. Below we break down the most relevant specifications, highlight standout features, and answer some common questions you might have before stepping behind the wheel.

Powertrain Options and Performance

The Sierra 2500HD offers two engine choices, each paired with a 10‑speed automatic transmission:

• 6.6‑liter Duramax Turbo‑Diesel V8 – 401 hp and 464 lb‑ft of torque; tuned for maximum torque low in the rev range, ideal for heavy‑duty towing.
• 6.2‑liter V8 gasoline – 420 hp and 460 lb‑ft of torque; delivers a smoother, higher‑rev feel while still moving a respectable payload.

Both powertrains sit on a reinforced frame with leaf‑spring rear suspension, giving the Single Cab a respectable payload capacity of roughly 4,000 lb and a maximum trailer‑tongue rating near 18,500 lb when properly equipped.

Dimensions, Bed Size, and Exterior Features

The Single Cab’s footprint is purpose‑built for maneuverability in tight work zones:

• Overall length: ~229 in.
• Wheelbase: 146 in.
• Width (mirrors folded): 81.6 in.
• Height: about 77 in.
• Bed length: 6.5 ft (standard 6‑ft 2‑in. option on certain trims).

Even without the extra rear doors, the Sierra’s exterior retains several practical touches. The MultiPro Tailgate—available on higher trims—offers six configurations, from a traditional drop‑down to a work‑box mode that opens the lower half for easy cargo access. Integrated LED headlights and a functional grille with the iconic GMC “V” logo add both style and visibility.

Interior Comfort and Technology

Inside, the cabin balances ruggedness with everyday comfort. The Single Cab typically features a two‑seat layout with optional leather‑trimmed upholstery, heated front seats, and a leather‑wrapped steering wheel. The infotainment hub is an 8‑inch GMC Infotainment System that supports:

• Apple CarPlay and Android Auto (wired connection).
• Bluetooth audio streaming and hands‑free calling.
• Available wireless charging pad for compatible smartphones.

For those who spend long hours on the road, the optional GMC Pro Grade Trailering System adds a digital hitch view, trailer brake controller, and adaptive cruise control that can follow a towed vehicle.

Towing, Payload, and Trailer‑Ready Equipment

When it comes to moving heavy loads, the Sierra 2500HD Single Cab shines:

• Maximum conventional towing: up to 18,500 lb (diesel) or 14,500 lb (gasoline) with the proper tow package.
• Maximum payload: around 4,000 lb, depending on axle ratio and configuration.
• Standard tow‑assist features: integrated trailer brake controller, trailer sway control, and an available rear‑view camera with hitch‑assist guidelines.

These capabilities are complemented by a reinforced rear axle, a heavy‑duty cooling system, and an optional front‑axle lift kit for added ground clearance when off‑road or navigating uneven job‑site terrain.

Trim Levels and Available Packages

The Single Cab comes in three primary trims, each targeting a different set of needs:

• Elevation – Base trim with essential features, steel wheels, and a functional interior.
• SLT – Adds chrome accents, upgraded upholstery, and the optional MultiPro Tailgate.
• Custom – Focuses on rugged aesthetics: blacked‑out grille, tow‑package, and additional off‑road accessories.

The AT4 off‑road package, while popular on crew‑cabs, is not offered for the Single Cab configuration in 2022.

Safety and Driver‑Assistance Technologies

Even a heavy‑duty truck like the Sierra 2500HD includes modern safety aids:

• Forward Collision Alert with automatic emergency braking.
• Lane Keep Assist with lane departure warning.
• Rear‑Vision Camera and optional 360‑degree camera system.
• Blind‑Spot Monitoring with rear cross‑traffic alert.

These systems are standard on the SLT and Custom trims, while the base Elevation offers a pared‑down set, primarily focusing on the rear‑view camera.

Real‑World Considerations: Fuel Economy and Reliability

The diesel engine, while delivering superior torque, typically averages around 15 mpg combined, whereas the gasoline V8 sits near 13 mpg combined—figures that reflect the Sierra’s heavy‑duty nature rather than everyday commuter efficiency. Owners report that the Duramax diesel is notably durable, often lasting well beyond 300,000 miles with regular maintenance. The gasoline option, while less fuel‑efficient, can be more appealing in regions where diesel fuel is less readily available.

Why Choose the Single Cab?

If your primary goal is to haul, tow, or transport equipment rather than passengers, the Single Cab eliminates the cost and weight of extra rear seating while still delivering the same chassis strength as its larger siblings. Its compact length improves parking and maneuverability in urban or construction‑site environments, making it a pragmatic choice for contractors, landscapers, and anyone who values raw capability over passenger capacity.

Frequently Asked Questions

What is the maximum towing capacity of the 2022 Sierra 2500HD Single Cab?

When equipped with the Duramax diesel engine, the proper tow package, and a 5‑speed axle ratio, the truck can tow up to 18,500 lb. The gasoline V8 variant caps around 14,500 lb.

How does the diesel engine compare to the gasoline option in everyday use?

The diesel provides more low‑end torque, which translates to smoother launches when hauling heavy trailers. It also tends to deliver better fuel mileage under load, though initial purchase price and diesel fuel availability can be limiting factors. The gasoline engine offers a higher rev range and may feel more responsive in lighter‑duty scenarios.

Is the MultiPro Tailgate available on the Single Cab?

Yes, but only on the SLT and Custom trims. The base Elevation trim does not offer the MultiPro system.

What are the main differences between the Single Cab and the crew‑cab versions?

Beyond the obvious seating capacity, the crew‑cab adds roughly 20 inches of overall length, which can slightly reduce payload and towing numbers due to added weight. The Single Cab’s shorter wheelbase improves turning radius, making it easier to navigate tight work sites.