Take an already badass Sierra EV, then pump up the grit, pump up the muscle, and pump up the off-road swagger. That's how GMC feels about the new AT4 trim, when it added two inches of ground clearance, 35-inch all-terrain tires, and off-road software that provides both style and function. When I drove it for the first time in Michigan, the tumbling look was one thing, but I was impressed with how the truck maneuvered over ruts and obstacles with so much confidence. With Terrain Mode managing brake modulation at speeds up to 25 mph, the AT4 felt like a well-seasoned adventurer, ready for weekend getaways and whatever needed to be tackled on the worksite.
Brutal Power and Stunning Range
Under the hood, the AT4 packs serious muscle. Opt for the Max Range version and you’re looking at a heart-pounding 725 horsepower and 775 lb-ft of torque. GMC claims a 0–60 mph sprint in under 4.5 seconds—a figure that doesn’t just sound fast; it feels fast in a nearly 9,000-pound behemoth. But its biggest flex might be the EPA-estimated 478‑mile range, backed by support for 350 kW charging (100 miles in 10 minutes). Whether tackling long hauls or spontaneous road-trip routes, you’re looking at a truck that combines brute strength with no-compromise efficiency.
Tech, Comfort, and Craning Over the Horizon
Indeed, the AT4 is serious off-road, but GMC has not neglected the comfort levels either. In the cabin, it is quiet, comfortable, and modern, with acoustic glass dampening outside noise, plus a massive and cool 16.8‑inch vertical infotainment screen that's super responsive. Rear-wheel steering also provides surprising maneuverability, complete with the cool CrabWalk mode. Heavy turning at low speeds no longer feels like trying to twist the Titanic; it feels like you're in a hot rod. Just steer, slip, slide in the mud, ruts or narrow forest tracks and you are right at home in the AT4.
Real-World Applications: Tough and Capable
On our 900‑acre private trail in Dryden, Michigan, the AT4 was quiet and determined as it drove through the rugged trail. Rear-steer helped with tight turns in the forest, and although the coil-spring setup was a bit stiff, it never felt harsh due to those big tires and the smart ride calibration to emulate what-you-would-like in a truck. Recovery hooks, bedliner, extendable MultiPro Midgate (good for hauling long lumber), and a 10.2‑kW off‑board power outlet integrated into the bed all made a huge statement here: this truck is meant to be used. Yes, it was not as cozy as the Denali with its air suspension, but it was a whole lot more purposeful - and characterful.
Why the AT4 Matters: A Daring New EV Option
The AT4 fills a hole in the electric truck market. It’s not a luxury truck (Denali) and it’s not a hardcore extreme truck (Hummer EV)–it’s a rugged, stylish, multipurpose truck that is capable, stylish, and off-roadable. Starting out at about $81,395 for Extended Range and $91,695 for Max Range, it’s higher than everyone’s comfort zone, but it is genuinely versatile. GM says the AT4 trim has garnered about 20–21% interest in Sierra EV and draws in buyers looking for adventure. For us consumers looking for bold design combined with gaming tech levels in our EVs, the Sierra EV AT4 looks like the Swiss Army Knife of electric pickups.
Quick Spec Table: 2026 GMC Sierra EV AT4
| Feature | Extended Range | Max Range |
| Horsepower / Torque | 625 hp / 770 lb-ft | 725 hp / 775 lb-ft |
| 0–60 mph | ~4.5 seconds | Under 4.5 seconds |
| Ground Clearance | #ERROR! | Same as ER; rugged, trail-ready |
| Tires | 35" all-terrain | 35" all-terrain |
| Range (EPA) | 410 miles | 478 miles |
| Charging Capability | 350 kW fast charge (100 mi/10 min) | Same |
| Price (starting MSRP) | $81,395 | $91,695 |
Conclusion
The 2026 GMC Sierra EV AT4 really strikes a rare balance in the electric truck realm. Rugged but ready, refined yet durable, powerful yet practical, techy but tough. It is not another electric truck; it's a lifestyle, a toy, and a theme-park ride all rolled into one. You get out of it with the impression that you've driven something special - something produced for more than performance. For the EV questers that want a unique, bold, beautiful, and fun product, the Sierra EV AT4 hit the nail on the head.
Source(Image / Thumbnail): motortrend
