The redesigned 2027 GMC Sierra 1500 AT4X gets upgrades you can see and, more importantly, hardware you can put to work off pavement. Standard 35-inch Goodyear Wrangler Territory® MT tires, front and rear electronic-locking differentials, a 2-inch suspension lift, Multimatic® DSSV dampers, and new Multimatic® Jounce Control Dampers give GMC's off-road-focused full-size pickup a substantially revised setup. With the next-generation Sierra expected to reach dealerships before the end of 2026, Henderson, NV, drivers have more than a cosmetic redesign to examine.
AT4X Moves Beyond the AT4 Formula
AT4 remains in the Sierra lineup, but AT4X is built for drivers who expect rougher terrain. The 2027 model receives an exclusive hood and front fascia, a 2-inch suspension lift, and standard 35-inch Goodyear Wrangler Territory® MT tires. These are the first 35-inch tires offered on a Sierra 1500 AT4X. More important for traction are the standard front and rear electronic-locking differentials. Locking both axles can keep power moving to the wheels with grip when rocks, ruts, loose soil, and uneven surfaces start unloading individual tires.
New Jounce Control Dampers Handle the Hard Hits
One of the biggest mechanical additions is a set of Multimatic® Jounce Control Dampers. These work with the suspension to help manage larger impacts during higher-speed off-road driving and over rough terrain. AT4X also retains its Multimatic® DSSV dampers, so the Jounce Control Dampers aren't replacing the truck's existing specialized suspension hardware. They're another component added to the system. That distinction is important because suspension control becomes increasingly difficult as tire size, vehicle weight, speed, and impact forces rise.
The AEV Edition Adds Protection Where It Counts
The AT4X AEV Edition returns for drivers who need more protection around vulnerable areas of the truck. Equipment includes AEV front and rear bumpers, additional skid plates, a front skid plate, recovery hooks, black sport steps, and 18-inch machined high-gloss-black beadlock-capable aluminum wheels. Dual downturn exhaust outlets are also included. The beadlock-capable wheels, recovery equipment, and additional protection make the AEV Edition more than a styling variation on the standard AT4X.
The Cabin Gets Redesigned, Too
The 2027 AT4X receives a Timber Mahogany interior with Bright White accents, enhanced front-seat bolstering, a sport flat-bottom steering wheel, perforated materials, quilting, embroidery, and stainless-steel speaker grilles. A panoramic sunroof is standard. The redesigned dashboard brings a 16.3-inch center display and 12.2-inch Driver Information Center, while the broader Sierra lineup offers more than 60 inches of combined available digital display area. It's considerably more technology inside a truck whose most interesting engineering remains underneath it.
Super Cruise® Is Standard on AT4X
Super Cruise® becomes standard equipment on the 2027 AT4X and includes trailering capability. The hands-free driver-assistance system can operate on more than 600,000 miles of compatible roads across the U.S. and Canada and supports Automatic Lane Change and Turn Signal Initiated Lane Change. That's a different sort of capability from locking differentials and suspension travel, but it can become significant when a trail trip involves hours of compatible highway before the pavement ends.
Engine Specifications Are Still Coming
The redesigned Sierra lineup introduces new sixth-generation 5.7L and 6.6L V8 engines alongside an enhanced TurboMax® engine and available 3.0L Duramax® Turbo-Diesel. Available engines pair with a 10-speed automatic transmission. GMC has not yet released complete AT4X engine availability, horsepower, torque, towing, or payload figures. Those numbers will be critical for buyers planning to tow trailers or load the truck with substantial off-road equipment, so configuration-specific ratings should be checked once GMC releases them.
Follow the 2027 Sierra AT4X at AutoNation Buick GMC Henderson
Henderson, NV, drivers can visit our Buick and GMC dealership to learn more about the redesigned 2027 GMC Sierra 1500 AT4X, compare its equipment with AT4 and the returning AEV Edition, explore current GMC truck inventory, value a trade-in, review financing options, and receive updates as final capability specifications become available.