2021 Sierra 2500 Heavy Duty Denali Crew Cab

One rugged, but sophisticated truck
February 6, 2021 Updated: February 6, 2021

The GMC Sierra HD is loaded with features that make this work truck perfect for performing any task, and venturing where most trucks are afraid to go.

An example of such feature is the world’s first six-way MultiPro tailgate. An inner tailgate opens and folds several ways to enable six functional positions which adds two different load stops, a work surface, plus a full-width step. Or the inner gate can simply fold all the way down and get out of the way, letting you stand a few inches closer to the bed.

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The inner gate folds down as a workspace. (Courtesy of GMC)

The feature I enjoyed the most was the towing and trailer technology. The ProGrade Trailering System aims to make towing simpler, and is standard on the Denali. This technology adds intelligence in the towing experience through In-Vehicle Trailering App, plus a companion smartphone app called myGMC that keeps the system at your fingertips even when away from the vehicle. The main functions of this system include multiple trailer profiles, pre-departure checklist, trailer light test, and trailer tire pressure monitor.

Sierra offers a segment-first multi-color 15-inch head-up display (HUD) which projects customizable vehicle data onto the windshield to help keeping the driver’s eyes on the road.

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The interior of Sierra HD Denali. (Courtesy of GMC)

Inside the cabin there are more luxury features than the Presidential Suite at the Ritz Carlton.

The 10-way heated and ventilated perforated leather bucket seats are complemented by the leather-wrapped steering wheel. Rear outer seats are heated as well.

The seating positions you perfectly for employing the ProGrade Trailering System, bed view camera, and Premium GMC Infotainment System with Navigation. The software living behind the 8-inch HD multi-touch display supports Bluetooth audio streaming, Apple CarPlay, and Android Auto.

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Bed view camera on the center display. (Courtesy of GMC)

The Sierra looks good as it moves down long stretches of highway or city roads. Adventures are made more rewarding with off-road suspension with Rancho Shocks, plus StabiliTrak with Trailer Sway Control and Hill Start Assist. All these features go quite nicely with 20-inch all-terrain tires.

This big truck is powered by a 6.6-liter V8 engine and 6-speed heavy-duty electronically-controlled transmission. My week of driving netted me 12.3 mpg.

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One of two load-stop modes. (Courtesy of GMC)

I would be remiss if I didn’t mention some of the numerous active safety features like standard StabiliTrak electronics stability control, Lane Change Alert with Side Blind Zone Alert, Automatic Emergency Braking, Follow Distance Indicator, Hitch Guidance with Hitch View, HD Surround Vision, and Rear Cross Traffic Alert.

The MSRP for a Sierra 2500 HD Denali AWD Crew Cab starts at $69,795.

Warranty
3 years/36,000 miles Bumper-to-Bumper Warranty
5 years/60,000 miles Powertrain limited Warranty
3 years/36,000 miles Corrosion Protection
6 years/100,000 miles Rust-Through Warranty
5 years/60,000 miles Roadside Assistance with Courtesy Transportation

Durhl Caussey writes a car column read around the world. He may be reached at this paper or durhlcaussey@gmail.com.