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GMC's AT4X trim expands to the beefy Sierra HD, giving the luxury pickup the talent to go just about anywhere in comfort, along with an 18,500 pound tow rating.
Tracking through the muddy footsteps of the Sierra 1500 and Canyon AT4X, the Sierra HD AT4X is than its trim mates and runs on 35" off-road-friendly tires.
General Motors is continuing its off-road segment push with the new 2024 GMC Sierra HD AT4X and AT4X AEV Edition Models. Like the Silverado HD ZR2, trucks pack off-road upgrades like Multimatic DSSV dampers and reworked suspension hardware.