GMC Sierra AT4X
2022-2024
The Sierra AT4X is GMC's answer to extreme off-road capability, combining professional-grade equipment with full-size truck practicality. It represents the pinnacle of GMC's off-road engineering with race-proven Multimatic dampers and comprehensive terrain management systems.
Quick Take
The Sierra AT4X is GMC's most capable off-road truck, featuring factory-installed front and rear electronic locking differentials and advanced traction management systems. It includes Multimatic DSSV dampers and specialized off-road equipment for extreme terrain capability.
Best For
Key Strength
Unmatched Factory Off-Road Package
Watch For
Steep Price Premium
The Story
Heritage & Legacy
Building on GMC's Professional Grade heritage, the AT4X nameplate represents the brand's commitment to serious off-road capability. It draws from decades of truck development and incorporates lessons learned from professional racing applications into a production vehicle.
Design Philosophy
The AT4X philosophy centers on uncompromising off-road capability without sacrificing on-road comfort or utility. Every component is selected for durability and performance in extreme conditions, from the Multimatic dampers to the specialized skid plates and recovery points.
The Driving Experience
Engine Character
The 6.2L V8 delivers robust, linear power delivery with abundant low-end torque for crawling over obstacles and towing heavy loads. The engine provides confident acceleration and maintains strong performance even under demanding off-road conditions with sustained low-speed operation.
Chassis Dynamics
Multimatic DSSV dampers provide exceptional control over rough terrain while maintaining comfort on pavement. The advanced four-wheel-drive system with locking differentials and terrain management allows precise control over traction and power delivery across varying surfaces.
Sound Signature
The naturally aspirated V8 produces a deep, authoritative rumble that intensifies under acceleration. The exhaust note is purposeful and mechanical, reflecting the truck's serious off-road mission.
Strengths & Tradeoffs
Defining Strengths
The AT4X comes with an unprecedented level of factory off-road equipment including MultiMatic DSSV dampers, front and rear e-lockers, and comprehensive skid plate protection. This eliminates the need for expensive aftermarket modifications while maintaining full warranty coverage.
The same damper technology used in Baja race trucks provides exceptional control both on and off-road. These position-sensitive dampers automatically adjust to terrain conditions, delivering comfort on highways and capability on trails that rivals custom suspension setups.
Honest Tradeoffs
Starting around $75,000, the AT4X commands a significant premium over standard Sierra models and even the regular AT4. The price puts it in luxury truck territory while still delivering a somewhat basic interior experience.
Despite the advanced suspension, the AT4X's off-road tuning, heavy weight, and all-terrain tires make it unsuitable for track use. The suspension is optimized for low-speed off-road work rather than high-speed cornering.
Ideal Owner
Perfect for serious off-road enthusiasts who need a capable daily driver and weekend adventure vehicle. Appeals to those who demand factory-backed extreme capability without compromising truck utility.