Because the Sierra is just a Silverado underneath, the powertrain options look identical, and every engine now sends its power to the wheels via a 10-speed automatic. If you’re curious about horsepower, torque, fuel economy, acceleration, or any of those other pesky details, though, you’ll have to wait. According to GMC, “Additional information about each engine offering, including detailed technical specifications, will be announced at a later date.”
So, if GMC isn’t that focused on the Sierra’s exterior design, the next-generation small-block V8s under the hood, or any other powertrain specs, for its initial reveal, what does GMC focus on? The Sierra’s new interior. It’s still a Silverado underneath, but if you have the money, this new generation can get pretty fancy, and the interior design is distinct from the Chevy. Regardless of the trim you’re interested in, GMC says the Sierra offers “best-in-class standard crew cab front head and leg room.” Plus, there’s an optional center console that offers a variety of configurations and the ability to fold the center armrest forward to create a large work surface that still promises easy access to those coveted USB ports.
GMC
Eventually, the 2027 GMC Sierra 1500 lineup will expand to include Pro, Elevation, AT4, and Denali trim levels. For now, though, GMC’s only really talking about the two most versions positioned at the top of the Sierra range — the AT4X and Denali Ultimate. Pricing is still a mystery, but the AT4X is set to be the ultimate off-road Sierra, while the Denali Ultimate promises even more luxury than the regular Denali already offers.
Since there’s more information on the Denali Ultimate, let’s get the AT4X out of the way first. Aside from a few exterior tweaks to give the Sierra a tougher appearance, AT4X highlights include a 2.0-inch lift, Multimatic Jounce Control Dampers that promise to improve high-speed off-road performance, 35-inch Goodyear Wrangler Territory MT tires, e-locking front and rear differentials, and an AT4X-exclusive interior option that GMC calls Timber Mahogany. A panoramic sunroof comes standard, and the speakers in the doors get stainless steel covers because steel is tough like a truck. The AEV off-road package remains an available upgrade.
