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All-New 2020 GMC Sierra HD Arrives With Advanced Towing Tech

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We think you’ll agree it looks a lot better than the Silverado HD.

The all-new 2020 GMC Sierra Heavy Duty is here, and it looks a lot better than its polarizing Silverado HD sibling. Yes, the grille is still massive, but it doesn't look as comically oversized as the Silverado's. Compared to the current model, the 2020 GMC Sierra HD has a longer wheelbase, a taller, more prominant hood line, and a taller overall height, as well as a larger grille. It also has headlights with GMC's 'light blades,' LED fog lamps, and roof marker lights on all dual-rear-wheel HDs and Sierra HD Denali models where they're permitted by law.

As standard, the 2020 Sierra HD comes with new cargo bed side steps located in front of the rear wheel openings in addition to the integrated CornerSteps in the rear bumper to improve access to the cargo area. A six-function MultiPro tailgate also comes as standard on SLT, AT4 and Denali models and is available on all trims.

Inside, GMC claims the Sierra HD's new interior has best-in-class front head- and legroom with Crew Cab models. A higher seating position complements the truck's taller profile, and Denali models get exclusive materials including premium leather-appointed seating, authentic open-pore wood trim, and dark-finish aluminum decor.

Following its introduction in the 2019 Sierra light duty, the 2020 Sierra HD features more advanced ProGrade Trailering Technology. The system uses 15 cameras, including an industry-first transparent trailer view giving a clearer view around the truck and compatible trailers to provide the driver with extra confidence when towing.

The transparent trailer feature uses the tailgate-mounted camera and an available accessory camera mounted on the rear of the trailer, which helps the driver to virtually see through the trailer to help navigate parking lots, merge into traffic or make tight turns.

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Other features of the ProGrade Trailering System include an in-vehicle Trailering App7 with Trailer Light Test, Trailer Electrical Diagnostics, Trailer Tire Pressure and Temperature Monitoring, Pre- Maintenance Reminders and Departure Checklist.

All 2020 GMC Sierra Heavy Duty models are powered by a 6.6-liter turbo-diesel Duramax engine that delivers 445 hp and 910 lb-ft of torque. This engine is mated to an all-new 10-speed Allison automatic transmission. With this setup, the heavy-duty pickup has a towing capacity "well in excess of" 30,000 lbs. More details about all-new gasoline engine and trailering capabilities will be announced soon, according to GMC.

The off-road focused Sierra AT4 HD has also been updated for the 2020 model year with dark chrome exterior touches and front and rear bumpers and a grille surround finished in body colors. The bold grille design is finished in black chrome. Inside, there's a darkened trim, textured aluminum finishes on the steering wheel, center stack and sill plates, Jet Black trim, leather seats, and embroidered AT4 badges on the headrests. The 2020 Sierra AT4 HD also has off-road suspension, 18-inch or optional 20-inch wheels wrapped with Michelin all-terrain tires, Traction Select System with specific Off-Road mode, Hill Descent Control and Hill Start Assist, and a 15-inch Head-Up Display.

The 2020 Sierra HD will go on sale in late summer and will be available in 2500HD and 3500HD dual rear wheel and single rear wheel configurations. Pricing will be announced at a later date.