The GMC Sierra 2500 HD is all-new for 2020, as it the 3500 HD. The heaviest hitters of the GMC lineup, the full-size HD Sierras have been improved with more passenger comfort and even better towing capacity, making them the class leaders.
There’s a new base engine for the 2500 HD in 2020. Every 2020 Sierra 2500 HD starts with a 6.6-liter V8 that outputs 401 horsepower and 464 pounds per foot of torque. From a performance standpoint, that already puts it head and shoulders above all the light-duty trucks that are all the rage.
Even more exciting is the optional 6.6-liter Duramax diesel V8 engine option that outputs 445 horsepower and a monstrous 910 pounds per foot of torque. This is now paired with a 10-speed automatic.
The base 2020 GMC Sierra 2500HD has a 6.6-liter V8 gas engine and a 6.6-liter turbo V8 diesel as an option. It comes in regular cab, double cab, and crew cab configurations. All can be chosen with two-wheel-drive or four-wheel-drive.
Standard features include Bluetooth, MP3 player, air conditioning, and bucket seats. The base model is kitted out in 17-inch all-season tires and 17-inch steel painted silver wheels.
The SLE model has 17-inch aluminum wheels. It has black power-adjustable vertical trailering mirrors and body-color door handles. The glass is now deep tinted and the tailgate gains a lower assist feature.
The SLE model has the option for the ProGrade Trailering System, an in-vehicle trailering app with high guidance.
The SLT includes a digital variable steering assist system that adjusts the steering based on speed and road conditions. This reduces driver fatigue.
The SLT model includes GMC MultiPro Tailgate as standard, a six-function tailgate that helps loading and unloading and improves access to the cargo box. The wheels have been upgraded to 18-inch 6-spoke aluminum.
Inside, a head-up display is available that projects vehicle information directly onto the windshield low in the driver’s line of sight. HD Surround Vision is an option that gives you an HD birds-eye view of the vehicle and its surroundings.
The AT4 trim comes with four-wheel-drive as standard. It’s built for off-road use, and as such, it has Rancho shocks, all-terrain tires, and skid plates.
The Denali is the luxury trim and includes everything from driver alert features (lane change alert, front and rear park assist, rear cross-traffic alert, following distance indicator, and Intellibeam headlights) to off-road suspension, Twin-tube Rancho shocks, and hill descent control. Take a test drive of the 2020 GMC Sierra Denali to understand how good HD trucking can be.
Expecting an HD truck to have poor ride quality? You’d be wildly off with the GMC Sierra 2500 HD. Decades of experience have gone into designing the all-new Sierra 2500 so that whether you’re driving it unladen, with a big payload, with a fifth-wheel trailer, or a bumper-mounted trailer, the ride quality is sublime.
The 6.6-liter diesel engine is surprisingly quiet, and it’s perfectly matched with its 10-speed Allison auto transmission.
Backing up and parking the vehicle is made easy with the big windows, multiple camera angles, and large optional tow mirrors.
The Sierra HD series offers the best-in-class towing capacity at a high 35,500 pounds. Other HD trucks like the Ram HD and Ford Super Duty simply can’t compete when it comes to towing large loads and carrying heavy payloads.
The GMC Sierra 2500 HD shares mechanicals with the Chevy Silverado HD, but the styling is markedly different. The Sierra 2500 has a more professional and refined look.
The most striking thing about the Sierra 2500 HD’s interior is how spacious and comfortable it is. The seats are big and comfy, with a range of adjustments. All of the important controls are within the driver’s easy reach. The infotainment system is easy to use and responds quickly. A multi-color HUD can be used to view tow cameras on a center screen.
If you’re opting for an HD model like the 2020 Sierra 2500 HD, one of your chief concerns will be how practical it is to use on a day-to-day basis. It’s a practical, professional truck through and through. It’s slightly bigger than the 2019 model, but it’s even easier to drive. In particular, trailering is made simple in the 2020 Sierra 2500 HD thanks to the multiple cameras and parking aids.