Off-road pickup truck

The GMC Sierra AT4 is beefy but useful where it matters

No, it didn't snow in June.

GMC

Testing trucks is always fun. Well, to be honest, testing any vehicle is fun and is absolutely a privilege, but I absolutely love putting trucks through their paces. My most recent tester was the 2021 GMC Sierra 1500 AT4, a factory off-road model with style and substance. Let's take a look at what makes it tick.

Off-Road-Ready Truck With a Stout Powertrain

Key upgrades here include a two-inch factory lift kit with Rancho Monotube Shocks, Goodyear Mud-Terrain tires mounted on 20-inch wheels, a two-speed automatic transfer case, and a traction select system with off-road and towing settings.

The net effect of all that gear is impressive. The AT4 rides as smoothly as many crossovers and maneuvers with relative ease for a truck its size. In town, there's little distinction in driving manners between this beefy off-road pickup truck and most family haulers, as long as being taller than nearly everyone else in traffic is ok with you. The truck handles well, and exhibits little instability over bumps at speed, which is a common challenge with pickup trucks and off-road vehicles.

My test truck was equipped with the optional 3.0-liter Duramax turbodiesel and a ten-speed automatic gearbox. With 277 horsepower and a stout 460 pound-feet of torque, it's the perfect companion for a truck meant to climb over and out of gnarly obstacles on the trails. In daily driving scenarios, the engine is quiet and refined, and shows little of the rattly, noisy diesel sound many people expect from the engines. With plenty of torque on tap, the AT4 feels somewhat lively, and is able to navigate traffic with ease. Reaching highway speeds and passing once there is also a breeze, and the truck remains surprisingly peaceful on the interstate.

Comfy Interior and Useful Bed Features

Inside, my test truck came equipped with leather upholstery and optional heated/cooled front seats. We had a rare heat wave in Maine during my week with the truck, and its powerful air conditioning combined with the cooled seats to create a much-needed oasis for this rare brutal week in northern New England. The front seats are wide and well-padded, but I found myself shuffling around, wanting more in the way of hip and thigh support. There's a tendency to slide to one side of the seat and stay there, which could easily be solved with a bit more bolstering on both the seat back and bottom.


2021 GMC Sierra AT4The Sierra's cabin is comfortable and well-made.GMC


As all of my vehicle testing adventures do, the week with the AT4 involved plenty of kid transport. The full-size pickup's back seat is wide and flat, which makes it ideal for installing car seats, but I can't imagine that it'd be extremely supportive for an adult over a long-haul trip. The truck's lift means it's hard for kids to climb in, but they had a fun time trying. The novelty may wear thin over time, but it lasted for the week we had the AT4. Once inside, the kids (and anyone else in the back seat) had their own air conditioning vents and plenty of room to stretch out in their booster seats.

Normally, a truck bed would be an afterthought in a review, but GMC has gone to lengths to make its bed a standout. The Carbon Pro composite bed material is tough, as in there's no need to worry about throwing whatever you want into the bed tough. I hauled over 100 30-pound patio paver blocks over the course of a few trips, and never felt the need to add extra protection to the bed after the first trip. I tossed an old rug and some flat cardboard to protect the bed at first, but it proved to be as stout as GMC claims. Adding functionality is the MultiPro tailgate, which offers several options for steps and different cargo hauling situations. It makes an excellent step, and when the center section is folded down, it opens up much more access to the bed when standing on the ground. My tester also had an optional Bluetooth speaker system built right into the step system, which would make for an awesome camping or beach party.

Tech-Heavy Cabin

In terms of tech, the Sierra AT4 is up to speed but nothing to write home about. Its optional 8.0-inch touchscreen runs wireless Apple CarPlay and Android Auto with an option for wired connections. There's also Bluetooth, SiriusXM Radio, and more. It's a cohesive system that is easy to use and intuitive, made even easier by clever behind-the-steering-wheel-mounted controls that allow volume and track adjustments. My truck also had an optional head-up display, which unsurprisingly is extremely difficult to see with polarized sunglasses. This is a common issue not unique to GMC, and could be solved by switching to non-polarized glasses.


2021 GMC Sierra AT4The MultiPro tailgate adds ultimate functionality.GMC


Most advanced safety equipment is optional, and when I say most, I mean all. The Sierra AT4, and all Sierras for that matter, is available with automatic emergency braking, a bed-view camera system, forward collision alerts, front pedestrian braking, a front/rear parking assist system, blind spot monitoring, lane keep assist, lane departure warnings, and more. While I get the need to differentiate models with various features, the lack of some of these safety items is hard to swallow at nearly $60,000.

Bottom Line

I tend to become infatuated with full-size pickup trucks while I have them in for testing, but that feeling typically fades after a while. The Sierra AT4 was a little different. The diesel engine and comfortable interior make for a supremely daily-drivable pickup truck, and the Carbon Pro bed with multi-function tailgate makes a strong case for the GMC. Ultimately, it's toomuch truck for me, but it's a solid choice for those that can put it to work.

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The Denali Ultimate trim is new for 2023.

GMC

The GMC Yukon has always been a luxurious family hauler with beefy capability, but it moved even more upmarket in recent years with added tech and upscale interior materials. GMC just announced an even cushier version of the SUV for the 2023 model year. The Yukon Ultimate Denali gets unique styling touches and upgrades that take the already plush SUV to another level.

2023 GMC Yukon Denali Ultimate22-inch wheels are standard GMC

The Denali Ultimate gets exclusive upgrades over other trims that include 22-inch wheels and chrome accents outside. The full-size SUV just got a complete redesign for 2021, which brought updated boxy styling, and a sleek look, so there are no additional exterior changes for 2023.

GMC offers three engines in the standard Yukon, but only two make it into the Ultimate. The standard powertrain includes a 6.2-liter V8 that produces 420 horsepower. A 3.0-liter turbodiesel is also available that makes 277 horsepower and a whopping 460 pound-feet of torque. A ten-speed automatic transmission is standard for all engines, and four-wheel drive is available.

Inside, the Ultimate comes with Alpine Umber full-grain leather upholstery with 16-way power front seats and massaging. Trim-exclusive contrast stitching and aluminum trim accent the space, and the top model gets an 18-speaker Bose audio system with stainless steel speaker grilles.

2023 GMC Yukon Denali UltimateGrained leather upholstery and upscale interior finishes are standard. GMC

A 10.2-inch infotainment touchscreen comes standard, and offers Google services built in. Wireless Apple CarPlay and Android Auto are also standard, along with wireless phone charging. A Wi-Fi hotspot and Amazon Alexa functionality are available. GMC also offers Super Cruise hands-free driving system in the Denali Ultimate.

GMC hasn’t detailed pricing for the new SUV yet, but we expect it to start at a premium over the standard Denali, which starts at just over $70,000.

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The Z06 isn't on sale yet, but it's already raising money for charities.

Chevrolet

Just a couple years ago, the Chevrolet Corvette got a major overhaul that completely changed its design, personality, and performance. The car moved to a mid-engine layout for the first time, and its V8 produces thundering performance at a reasonable price. As it has always done with the Corvette, Chevy's laying out special editions for the car, and one of the first in the new generation will be the 2023 Corvette Z06. An early Z06 sold at a Barrett-Jackson auction this weekend to raise money for charity, and the final dollar amount crested the $1 million mark.

2023 Chevrolet Corvette Z06The car raised $1 million at the Palm Beach Auction. Chevrolet

The car crossed the block at the Palm Beach Auction, which took place on April 9. It's the first production model of the car, which builds on the mid-engine eighth-generation Corvette. It's powered by a 670-horsepower 5.5-liter flat plane-crank V8, which sends its power to the rear wheels through an eight-speed dual-clutch automatic transmission. The engine revs much higher than a standard V8 and features a distinct sound. Chevy says the Z06's engine offers the most horsepower of any naturally aspirated V8 on sale.

2023 Chevrolet Corvette Z06Rick Hendrick was the winning bidder for the car. 2023 Chevrolet Corvette Z06

The car's $1 million price tag raised money for the Thurgood Marshall College Fund. The organization supports training of educators at Historically Black Colleges and Universities (HBCU) and Predominantly Black Institutions (PBI). This auction, together with the first retail version of the car auctioned earlier this year, brings the Corvette's total charity haul to $4.6 million in 2022.

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