GM boasts a broad range of off-roader models, offering up an extensive list of sub-brands and trims to highlight which vehicles have the highest level of capability when it comes to adventuring in the dirt. That includes the GMC AT4 sub-brand, which is available across almost the entirety of Big Red’s lineup. The question, then, is this – what does AT4 actually stand for?
As it turns out, the AT4 acronym actually stands for “All Terrain 4WD,” underlining which vehicles shine the brightest when exploring off the beaten path.
The GMC AT4 sub-brand debuted with the launch of the 2019 GMC Sierra 1500, replacing the Sierra All Terrain trim offered prior. The AT4 sub-brand quickly expanded across GMC’s lineup, hitting the GMC Sierra HD and GMC Acadia in 2020, the GMC Yukon in 2021, and the GMC Terrain in 2022. Notably, the inclusion of an AT4 variant for the Terrain lineup could be seen as bit redundant, given the name effectively breaks down as “GMC Terrain All Terrain 4WD.”
GM launched the GMC AT4 sub-brand on the 2019 GMC Sierra 1500.
Nevertheless, GMC’s AT4 badge continues to serve as a clear identifier for its off-road-focused offerings. Currently, the only GMC models without an AT4 trim are the GMC Savana van and the all-electric GMC Sierra EV pickup, although an AT4 variant of the Sierra EV is slated for future release.
It’s also worth noting that GMC has developed its AT4 brand even further with the introduction of two new specialized trims. Among them is the AT4X, which is positioned as an even-more-capable off-road variant for the Sierra 1500 and Sierra HD (and as a package for the GMC Canyon) thanks to upgrades to the chassis, suspension, tires, and bumpers, all of which provide exceptional performance in off-roading conditions. Inside, AT4X models are also equipped with Denali-level luxury.
Then there’s the AT4 Ultimate. Currently exclusive to the refreshed 2025 GMC Yukon, the AT4 Ultimate trim incorporates the rugged fascia and tires of the AT4, plus Denali-level interior features. However, the AT4 Ultimate does not provide any extra off-road prowess over the standard AT4, and thus does not adopt the AT4X designation.
What’s your favorite GMC AT4 model variant? Let us know in the comments!
Comments
Sierra McKinley anyone???
I’d be partial to a GMC Sierra William McKinley Edition. 😁
Was anyone actually wondering what it stood for? I thought it was self explanatory, but that’s just me I guess lol.
Z71 makes far less sense IMO
Z71 is an RPO code, and like many GM features, has a history behind it before it became the badge on the rear quarter panel that increases your trucks value by 3-5K. Like G80, LMG, or Z28, it used to be just a code in a booklet, but became so valued that GM started putting badges on so everyone could see on the lot which truck has more off road prowess from a mile away. AT4 looks to do the same thing in my view, but not stomp on the Z71 territory and makes more sense.
Except AT4 isn’t an RPO code. And it’s trim level is 4SB
X31 is the GMC equivalent to Z71. AT4 would be closer to what the Trail Boss package does for Chevrolet, with a bit more luxury thrown in for good measure.
Chris – it’s the second most-popular GMC-related question we’ve received over the past year or so. Not everyone is as much in the know as you are 🙂
I’m hoping “ Entry Level Stripper “ becomes a sub-brand .
Give us cheap guys a little cache .
Is the entry level stripper the one who doesn’t get the prime-time slot at the local club, always getting the day-shift hours mid-week??
You gotta like the “Frito Bandito” mustache on the new Terrain .
I bought the GMC Sierra 3500 AT4, the salesman didn’t ask if I wanted the X (I would have gotten it). I wish the 8′ bed was long enough to fit the Goldwing with the gate closed. Overall, after 1200 miles, I love the truck, especially the cameras, they really give peace of mind in the parking lots.
I have a 2018 Chevy Colorado ZR2 V6 extended cab. Love this truck, and would be devastated if something happened to it because the V6 and the extended cab variation have both been discontinued. So if I had to get something else, and I am not a fan of how the new Colorado looks, I would probably go with a new Canyon AT4X, even though it’s the same package as a ZR2, the interior of the AT4X is a lot nicer and I feel like the front nose looks better than the Colorado. (Not saying a Ford Ranger Raptor wouldn’t be a possibility either though!)
We just purchased a 2024 Terrain AT4 summit white with factory black wheels and beefy Goodyear tires.
The ride is smooth, handles nice and the turbo motor has plenty of power. It is my wife’s daily driver and gets great gas mileage. We are very satisfied with it. GMC AT4 trim level has some upgraded features and adds a sturdy stance to the appearance. Good job GMC!
I have a 2022 GMC sierra AT4X. I had a repair that was needed and have been without a vehicle for 7 Mos. The part is not in production and they have none available. I would be sure to do research and ask about part availability before purchasing this vehicle. GM has done nothing to help in resolving my issue. I have just been told to be patient
The point is, expect backorders. After Covid, supplier issues, everything has gone down the drain.
Did your engine blow? Or valve body kaboom? Either of those, I can understand why.
Since 2017 I have owned several new GMC Sierra 1500s. A mix of SLTs, Denalis and AT4s with 6.2s, 5.3s and 3.0 Duramax. I loved them all. My choice is the AT4 which I find to be the best packaged of the three variants. Although I was thrilled with the performance of the 6.2 rocket ships, the diesel with its high fuel mileage and torque is my favorite.