Peter Palmer: 2019 GMC Sierra AT4: No Road, No Problem

GMC Sierra fans are getting a little more bite for their bark as the 2019 Sierra AT4 looms on the horizon. GMC says the truck is a “unique formula” becasue it blends off-road capability with technology and refinement. The new Sierra was recently revealed amid strong sales. Earlier in March, Duncan Aldred, Global GMC Vice President, explained that SLT and Denali models account for 87 percent of the brand’s total crew cab sales.

And now a new AT4 coming is down the pipe.

Essential Equipment

This GMC special rolls out of the factory with a two-inch lift, two-speed transfer case, locking rear differential, and skid plates. The Rancho monotube shock absorbers, hill descent control, and traction select system each increase the truck’s 4×4 capability. And there’s even a suite of advanced safety features like Surround Vision, Lane Change Alert with Side Blind Zone Alert, and Front Pedestrian Braking.

The Sierra AT4 comes with three different wheel and tire combos: 18-inch wheels with all-terrain tires, or mud terrain-rated Goodyear Wrangler Duratrac tires, or the available 20-inch wheels with all-terrain tires. It’s your call.

Photo: GMC.

Power & Performance

Standard is the evergreen 5.3 V8 although the beastly 6.2 is available. GMC has not clarified horsepower or torque figures, but says both engines feature Dynamic Fuel Management. This replaces the current Active Fuel Management and differs in the sense it can shut off any number of cylinders, in a variety of combinations, to boost performance and efficiency. Dynamic Fuel Management enables the truck to operate on just one or all eight cylinders, depending on driving conditions.

Sierra AT4 buyers can also opt for an all-new Duramax 3.0-liter inline-six turbo-diesel. The Duramax and 6.2 are paired with a 10-speed automatic transmission. The aforementioned traction select system contains preset drive modes tailored for different terrain or weather conditions. The different modes adjust the Sierra’s transmission shift points, throttle mapping, and StabiliTrak to optimize performance.

When loading up those ATVs for the wild country, the new Sierra AT4 will give adventure seekers plenty of towing tools. GMC’s ProGrade Trailering feature with a compatible smartphone app is on offer. The system includes a pre-departure checklist, trailer light test, tire pressure monitoring for the trailer, and maintenance reminders among others. There’s also a handy bird’s-eye view that shows up on the infotainment screen.

GMC’s MultiPro Tailgate features six functions and positions, second-tier loading, a standing workstation, and integrated hand grips and bumper steps. Photo: GMC.

Styling & Design

The Sierra AT4 should look pretty slick coming down the road with its darker exterior finishes, black chrome, and touches of red. The front and rear bumpers and grille surround match the truck’s body color, and the C-shaped LED lighting is a nice touch. A premium high-gloss black finish was even applied to the window trim, mirror caps, and skid plate.

On the inside, drivers are treated to a darker cabin with tinted and textured aluminum finishes on the steering wheel, center stack, and sill plates. Long trips should be a breeze thanks to the leather-trimmed seats and Jet Black/Kalahari color accents. Special AT4 badging on the headrests and floormats finish off the interior treatments.

Pricing & Availability

GMC has not reveled pricing at this time. Expect the new Sierra AT4 at dealerships this fall.

Carl Anthony is Managing Editor of Automoblog and resides in Detroit, Michigan. He studies mechanical engineering at Wayne State University, serves on the Board of Directors for the Ally Jolie Baldwin Foundation, and is a loyal Detroit Lions fan.