Ten days after Chevy pulled the sheet off the 2027 Silverado, GMC answered. On June 25, 2026, the next-generation 2027 GMC Sierra 1500 made its official debut — and while the Denali Ultimate is grabbing headlines with its wall of screens, the truck that matters for anyone reading this blog is the new AT4X: 35-inch tires from the factory, Multimatic dampers, and an e-locker combination no other half-ton offers.

The first trucks land at dealers before the end of 2026. Here's the full breakdown.

The AT4X is the most capable Sierra ever — and it's not close

GMC calls the new AT4X its most off-road capable Sierra yet, and the hardware backs it up:

35-inch Goodyear Wrangler Territory MT tires, standard. A Sierra first. Real mud-terrains from the factory, matching the jump Chevy just made on the Silverado ZR2.

Multimatic Jounce Control Dampers. New for this generation and tuned specifically for high-speed off-road hits. If the Multimatic name sounds familiar, it's the same company that does dampers for the Ferrari Purosangue and Mustang GTD — serious suspension pedigree pointed at the dirt.

Front AND rear e-locking differentials. This is the one to remember: GMC says the front-and-rear e-locker combination isn't offered by any competitor in the class. Raptor doesn't have a front locker. RHO doesn't. For technical terrain, that's a genuine trump card.

Add a 2-inch suspension lift, an exclusive hood, and a reworked front fascia, and the AT4X finally looks as serious as its spec sheet. Inside, it gets an exclusive Timber Mahogany colorway, heavily bolstered front seats, a flat-bottom sport steering wheel, and a standard panoramic sunroof — a trail truck that doesn't punish you on the drive home.

The AEV Edition returns for maximum armor

For buyers who want to push further, GMC confirmed the AT4X AEV Edition carries into 2027 — stamped steel bumpers and boron-steel underbody protection developed with American Expedition Vehicles. Think of it as the AT4X with a suit of armor: same class-exclusive e-lockers and Multimatics, plus the hardware to survive real rock work.

Two all-new V8s under the hood

The 2027 Sierra debuts GM's sixth-generation Small Block V8 family — an all-new 5.7-liter and a 6.6-liter — with updated combustion, cooling, and fuel injection systems. They join an enhanced 2.7L TurboMax four-cylinder and the class-exclusive 3.0L Duramax turbodiesel, and every engine pairs with a 10-speed automatic. No hybrid at launch — GMC says the diesel will out-economy the hybrid pickups from Toyota and Ford anyway.

Official horsepower and torque numbers haven't dropped yet; GMC says full specs come closer to launch. These are the same new V8s appearing in the 2027 Chevy Silverado 1500 we covered when it debuted — the two trucks share bones, but GMC has worked hard to separate them everywhere you look and touch.

Goodbye SLE and SLT: the new trim lineup

GMC simplified the range to six trims: Pro (work truck), Elevation (the volume retail trim, absorbing the old SLE and SLT), AT4 (factory-lifted off-road staple), AT4X (the desert and trail flagship, with the AEV Edition package above it), Denali (premium), and Denali Ultimate (the everything truck). If you've been an SLE or SLT buyer for the last twenty years, Elevation is your new home.

60+ inches of screens — and one of them moves

The Denali Ultimate stacks more than 60 inches of combined displays: a 16.3-inch center touchscreen, 12.2-inch driver cluster, 11.5-inch passenger screen, 15-inch head-up display, and an 8.5-inch digital rearview mirror. The party trick: the center screen is motorized and slides upward at the touch of a button to reveal a hidden storage vault in the dash. GMC validated the mechanism through thousands of cycles in sub-zero and high-heat chambers. Super Cruise hands-free driving — which now works while towing — comes standard with a three-year subscription on the top trims.

Price and timing

Pricing hasn't been announced. For reference, the 2026 Sierra starts at $41,095 with destination, and the current AT4X and Denali Ultimate sit in the mid-$80,000s — expect the 2027s to creep up from there, with the Denali Ultimate likely flirting with $90,000. First trucks arrive at dealers before the end of the 2026 calendar year, with full specs and pricing rolling out over the summer.

Lighting the new AT4X (and the Sierra you already own)

Here's our take as lighting people: GMC built the AT4X for exactly the kind of driving where factory lighting runs out first. High-speed desert work on 35s means outrunning your headlights; technical trails with front and rear lockers mean picking lines in the dark corners your low beams never touch. A light bar for distance and ditch lights for the sides aren't accessories on a truck like this — they're the last piece of the build.

If you're running a current Sierra, our GMC Sierra 1500 LED light kits — light bars, ditch lights, and pods — bolt on today. Picking up a 2027 when they land this winter? Fitment for the next-gen truck is coming soon, and we'll be ready when your AT4X is.

FAQ: 2027 GMC Sierra 1500

When does the 2027 GMC Sierra 1500 come out?
GMC revealed the truck on June 25, 2026, and the first 2027 Sierra 1500s arrive at dealerships before the end of the 2026 calendar year.

What engines does the 2027 Sierra 1500 have?
Four options: all-new sixth-generation 5.7L and 6.6L Small Block V8s, an enhanced 2.7L TurboMax four-cylinder, and the 3.0L Duramax turbodiesel. All use a 10-speed automatic. No hybrid is offered at launch.

What's new on the 2027 Sierra AT4X?
Standard 35-inch Goodyear Wrangler Territory MT tires (a Sierra first), Multimatic Jounce Control Dampers, front and rear e-locking differentials (a combination no class competitor offers), a 2-inch lift, an exclusive hood, and a new front fascia. The AEV Edition adds steel bumpers and boron-steel underbody armor.

How much will the 2027 Sierra 1500 cost?
Pricing hasn't been announced. The 2026 model starts at $41,095, and the current AT4X and Denali Ultimate run in the mid-$80,000s — expect 2027 prices to rise from there.

What happened to the SLE and SLT trims?
They're gone. The new Elevation trim replaces and absorbs both, sitting between the work-focused Pro and the off-road AT4 in the six-trim lineup.

The half-ton off-road war is officially on

Raptor, RHO, TRX, the new Silverado ZR2 — and now an AT4X with lockers at both ends riding on 35s. The factory off-road arms race hasn't been this good in years. Would you take the AT4X's locker combo over the Raptor's suspension travel? Hit us up on socials — and if you're building out a Sierra right now, you know where the lights are.