2020 GMC Sierra HD Has Brains, Brawn And 15 Cameras That Let You See Through Its Trailer

Not long after introducing some smaller GMC Sierra models earlier this month, the automaker has lifted the veil on the all-new 2020 Sierra Heavy Duty.

GMC has outfitted the heavy duty pickup with a plethora of new features. One of the most important updates is the ProGrade Trailering System.

This system provides the driver with 15 camera views, including a transparent trailer view that allows those behind the wheel to tow with ease. Other features of the ProGrade Trailering System are a Trailer Light Test, Trailer Electrical Diagnostics, Trailer Tire Pressure and Temperature Monitoring, Pre-Maintenance Reminders and a Departure Checklist.

Bigger and smarter.

A host of other technologies have been added to the Sierra Heavy Duty to make towing a breeze. For example, there’s an Auto Electric Park Brake, Park Grade Hold Assist, Integrated trailer brake controller, Hill Start Assist, Hill Descent Control, Trailer Sway Control, Auto Grade Braking, Diesel Exhaust Braking, and a Tow/Haul mode. To put it simply, the new Sierra Heavy Duty thrives when there’s something hooked up to its rear.

An eye-catching design also set the new Sierra Heavy Duty apart from the old model. There’s a massive front grille, 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.

It’s not just the exterior design that makes the new pickup stand out. The vehicle itself is actually longer and taller than the previous model.

All 2020 GMC Sierra Heavy Duty models use a large 6.6-liter turbo-diesel Duramax engine that delivers 445 hp and 910 lb-ft (1233 Nm) of torque. This engine is mated to an all-new 10-speed Allison automatic transmission. With its potent powertrain, the pickup can tow in excess of 30,000 lbs (13607 kg).

GMC has also updated the Sierra AT4 HD for the 2020 model year. The AT4 is the more off-road focused Sierra Heavy Duty variant and includes a number of dark chrome exterior touches as well as bespoke front and rear bumpers. Inside, the vehicle includes darkened trim, textured aluminum finishes, Jet Black trim, leather seats, and embroidered AT4 badges on the headrests.

The AT4 also includes off-road suspension, bespoke 18-inch wheels, a 15-inch Head-Up Display, and Traction Select System with a specific Off-Road mode.

Sales of the 2020 Sierra Heavy Duty will start later this year in 2500HD and 3500HD configurations. Prices have yet to be announced.


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  • Significantly better looking than the ghastly Silverado HD.

    • Mr. EP9

      Yeah, that’s been a recurring theme. Don’t like the Chevy trucks, just wait for the GMC version.

    • donald seymour

      I actually like the Chevy.

  • MarketAndChurch

    The HD truck segment is the best it’s ever been, and this may be the best in the segment.

  • Zandit75

    As if the oversized truck is not the first indicator, but surely having a caravan that size is a sign of someone overcompensating for something??!!

  • no25

    Don’t care for the grille especially the blacked out one in the first pic – looks wavy and a bit of a mess, but overall, better than the Silverado HD

  • Merc1

    Just sat in a Chevy High Country model today, it’s the cheapest ugliest design of any full size pickup today.


  • Bash

    Cool. But it’s ugly.

  • john1168

    Nice truck with some pretty cool tech. I just wish they made those hinges on the side view mirrors look better. These look like they were made by Fisher Price.

  • schnittz

    Not only it’s the best looking HD yet, buts it’s also most tech advanced.

  • Enoch Gabriel Gonzales

    What’s the point of GMC? can Americans explain it to me? I mean Chevrolet-GMC is not like Hyundai-Kia. There’s not much difference between the 2 american brands in the looks department, to say the least.

  • Thomas Elkins

    Better looking than the Chevy, but still butt ugly.

  • cbATL

    The interior looks like a 1980’s boombox. GM – get your sh!t together!

    • Spideymanz

      YES INDEED! I saw this at the NAIAS, and while I love the exterior face on this and the Denali – the interior was SO DAMN BAD. GM had a rubber, faux wood, plastic party. This was the same theme for most of GM vehicles. The best car at the NAIAS was the 59′ Cadillac Eldorado! Hands down better made than any modern car on display.

  • FastRabbit08PL

    I love that most of the photos are photoshopped like they could get the truck on top of the mountains.. 🙂

  • Dylan Wentworth

    Those cameras to look through the trailer look like a fantastic way to forget you’re towing a large trailer and cause a deadly wreck.

  • Tumbi Mtika

    The Silverado HD looks better. But both are overstyled messes.

    Ram 2-0 GM

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