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2021 GMC Sierra 1500 AT4
Meet the 2021 GMC Sierra 1500 AT4—a factory-built off-road bruiser that doesn’t just leave the pavement… it forgets it ever existed.
Right out of the gate, MultiPro Tailgate, that is, the AT4 separates itself with a 2-inch factory suspension lift, giving it that perfect stance—high enough to command the road, dialed enough to stay composed at highway speed. It’s not an afterthought lift. It’s engineered, tuned, and trail-ready straight from GMC.
Underneath, you’ll find the hardware that matters:
Off-road suspension with Rancho monotube shocks
Skid plates protecting the vitals
Standard 4WD with a 2-speed transfer case
Automatic locking rear differential for when traction gets sketchy
This Sierra doesn’t flinch when the terrain turns unpredictable—it leans in.
The exterior carries that rugged confidence with signature AT4 styling—body-color accents, bold grille presence, and aggressive wheels wrapped in all-terrain rubber. It looks just as at home covered in dust as it does cleaned up under showroom lights.
Inside, it’s a different kind of wild. The AT4 blends toughness with refinement:
Premium leather-appointed seating with Kalahari accents
Heated front seats and steering wheel
Intuitive touchscreen with Apple CarPlay & Android Auto
It’s a cabin built for long hauls, early mornings, and roads that don’t show up on maps.
With the 6.2L V8 powertrain you’re getting confident towing capability paired with everyday drivability.
This 2021 GMC Sierra 1500 AT4 isn’t trying to be everything to everyone. It’s built for the driver who wants real capability without sacrificing comfort, and who understands that sometimes the best roads… aren’t roads at all.
This vehicle may have an open safety recall. Head to the National Highway Traffic Safety Administration (NHTSA) website to perform a quick search.
Some vehicles may be subject to manufacturer safety recalls. See if there are any open safety recalls for this vehicle. This does not include non-safety recalls. Recently announced safety recalls may not yet be posted and there may be a delay between the time a repair is made and before it is reported or posted to the website. Before purchasing, be sure to ask the dealer for an up-to-date status on any recalls.
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42,911 miles
