We leveled a 2020 GMC Sierra 1500 AT4 with a ReadyLift 1.75-inch kit and ReadyLift upper control arms — raising the front to a square stance, adding clearance, and correcting the front geometry so the alignment and ride stay right. A clean, done-properly level on an already-capable off-road trim.
This Sierra AT4 came through Juggernaut USA in Wheat Ridge (Denver), CO for a leveling kit. The AT4 already comes loaded for the dirt — skid plates, a locker, red recovery hooks — but it still leaves the factory nose-down rake. A modest level squares it up, opens clearance for a slightly bigger tire, and gives it the stance to match its capability. Doing it with ReadyLift upper control arms keeps the front-end geometry correct at the new height.
| Detail | Spec |
|---|---|
| Vehicle | 2020 GMC Sierra 1500 AT4 |
| Leveling | ReadyLift 1.75-inch leveling kit |
| Control arms | ReadyLift upper control arms |
| Result | Level stance, added clearance, corrected front geometry |
ReadyLift leveling with upper control arms
A 1.75-inch level raises the front to sit even with the rear and clears up the wheel gap. What makes this one a proper job is the ReadyLift upper control arms: raising the front changes the ball-joint and alignment angles, and new upper arms restore the geometry so the truck aligns correctly and the ride stays composed. It is the difference between a level that just looks right and one that drives right too.
A square stance on a capable trim
The AT4 is GMC's off-road half-ton, and a level finishes the look the factory started — even front to rear, room for a meatier all-terrain, and a more planted presence. It is the single most popular upgrade on these trucks for a reason: big visual and clearance gains, minimal downside, and it keeps the ride the AT4 is known for.
Protect the underside too
A leveled, more capable AT4 sees more dirt — which is exactly when the underside needs armor. We make 1/4-inch aluminum skid plates for this truck right here in Colorado: our GMC Sierra 1500 skid plate package shields the engine, transmission, and transfer case with a lifetime warranty. Adding clearance and adding protection go hand in hand.
Common questions on this build
Why do I need upper control arms with a leveling kit?
Raising the front changes the suspension geometry. Upper control arms designed for the new height restore correct ball-joint angles and alignment range, so the truck aligns properly and wears tires evenly. On bigger levels they are strongly recommended.
How big a tire can I fit after leveling an AT4?
A level opens room for a modestly larger all-terrain than stock. The exact size depends on wheel offset and trimming — bring us your setup and we will spec it to clear.
Can you level my Silverado or Sierra?
Yes — leveling kits, lifts, wheels and tires, skid plates, and the geometry work to keep it driving right. We do it in-house.
Book the same work
We level and lift trucks in-house at our Wheat Ridge shop north of Denver — the geometry done right, not just spacers. We serve Denver, Wheat Ridge, Golden, Arvada, Lakewood, and the Front Range. Call (970) 341-4221 to talk through your build, or see our install services and suspension and lift installation. More from the bay: our custom Silverado prerunner bumper.
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