Expected to hit dealers sometime in the fall, GMC will build a third AT4X trim-equipped truck, this time based on the heavy-duty Sierra. Just like the Sierra 1500 and Canyon, you get a lifted suspension, fancy shock absorbers, and proper off-road tires. But the Sierra HD breaks the mold by retaining its optional Duramax diesel power and mega towing capacity.
Sticking With the AT4X Recipe
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Just like the other AT4X models, GMC will lift the Sierra HD an additional 1.5 inches, as well as install Multimatic DSSV shock absorbers, a rear e-locking differential, 35-inch (LT305/70R18) Goodyear Wrangler Territory mud-terrain tires, beefed-up control arms and steering knuckles, and skid plates up front and for the transfer case.
And to make the best use of that equipment is Off-Road mode, a new driving mode that utilizes stability control systems as well as engine and transmission controls to improve driving feel when it’s time to leave the pavement.
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But think of this as more a glamping kind of truck, as opposed to pure camping, as the Sierra HD also includes luxury appointments like leather-wrapped massaging front seats. That will help you stay comfortable while listening to the 12-speaker Bose sound system. To add some old-school class, GMC added Vanta Ash wood to the trim, too.
Of course, no modern interior feels complete without a plethora of screens. In this latest AT4X, GMC installed a 13.4-inch center console touchscreen to control that Bose stereo, among many other things. Your instrument cluster is a fully digital 12.3-inch screen, with multiple information configurations to choose from. That’s complemented by a 15-inch head-up display to help keeps your eyes looking ahead.
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Powered Up
Tow as You Go
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2024 GMC Sierra AT4X Extreme AEV Edition
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Sierra AT4X First Impressions
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