2022 GMC Sierra 1500 AT4X Turns into the Ultimate Overland Truck

  • The 2022 GMC Sierra 1500 AT4X has been transformed into a custom-built overland truck.
  • The overland version of the AT4X features 33-inch tires, a flatbed with a canopy, and rear-mounted air springs.
  • The stock AT4X starts at $77,395 and has electronic locking front and rear diffs as well as Multimatic spool-valve dampers.

    The overlanding scene has become wildly popular—some might even say oversaturated—but sometimes there are builds that catch our eye and are based on an interesting new model. Enter this 2022 GMC Sierra 1500 AT4X that’s been transformed into an awesome overland truck. It was assembled with an assortment of aftermarket parts and debuted today at the Overland Expo West in Flagstaff, Arizona.

    At the core of the build, which was completed by Mule Expedition Outfitters, is the Sierra AT4X. GMC touts the newly introduced model as the pinnacle of the half-ton truck’s off-road capabilities. Essentially an enhanced version of the regular AT4, the X-rated version has exclusive equipment such as electronic locking front and rear differentials, extra underbody protection, longer suspension travel, and trick Multimatic spool-valve dampers. We recently drove the AT4X around the Anza-Borrego Desert State Park in Southern California and saw what it can do firsthand.

    While the truck’s leather-lined and tech-laden interior is basically stock, as is its 420-hp 6.2-liter V-8 and 10-speed automatic transmission, its back half has been retrofitted with features that make the AT4X almost unrecognizable. The transformation starts with the 6.4-foot flatbed that replaces the truck’s standard 5.8-foot cargo bed. Behind the cab is a 3.0-foot canopy (a.k.a. a dog box) that contains a camp kitchen and a shower with a heater. There’s also a fridge inside and solar panels mounted on top.

    2022 gmc sierra 1500 at4x ultimate overland vehicle


    2022 gmc sierra 1500 at4x ultimate overland vehicle


    More than 20 aftermarket parts and accessories adorn the Sierra AT4X. Some of the other standout add-ons include five amber LED lights on the roof, a retractable awning, a two-person ground tent, and an onboard air compressor. The latter comes in handy after airing down the truck’s gnarly tires, which replace the stock set with larger 33-inch Firestone Destination M/T2 rubber mounted on unique 17-inch rims (18s are stock). The other notable upgrade on this overland AT4X is the air springs on the rear axle that help manage the weight of all the extra equipment on the back.

    Before any modifications, the ’22 Sierra 1500 AT4X has a lofty starting price of $77,395. While Overland Expo didn’t disclose the cost of the parts or the installation, we wouldn’t be surprised if this custom-built overland version approached or exceeded six figures.

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