Best Leveling Kits for Silverado 1500 / Sierra 1500

On the Ford, a leveling kit decision starts with dampers and driver assistance. On the GM twins it starts somewhere simpler and stricter: which trim is on the badge? Chevrolet and GMC sell factory-lifted versions of these trucks — Trail Boss, AT4, ZR2, AT4X — alongside standard ones, and the kit catalogues split cleanly along that line. Buy by trim and this platform is easy. Buy by price alone and you will own a kit your truck excludes. So this guide is organised by trim first and brand second, and every kit in it was verified on its manufacturer’s product page on the date shown. Coverage is the current T1XX generation (2019+); the honesty note about the older K2XX trucks is at the bottom, and it matters.

How we chose these kits

Verified-spec comparison, as everywhere on this site: manufacturer product page, recorded lift, stated max tire, stated price, and the exclusions in the manufacturer’s own words — our method is in how we test and verify, and we have not hands-on tested any of these kits. Four kits verified for this page, covering all four trim families. Between them they also cover the platform’s whole price spread, from a $39.95 spacer configuration to $559.95 kits with replacement upper control arms.

The quick picks, by trim

Your truck	Kit	Front lift	Price basis	Why this one
Standard Silverado / Sierra (no ARC)	Rough Country 1323	2″	From $39.95 at Rough Country	The budget spacer, with the platform’s clearest exclusion list
Standard Silverado / Sierra (no ARC)	ReadyLIFT 66-39150	1.5″	$149.95 at ReadyLIFT	The conservative level with a manufacturer-stated 33″ fitment
Trail Boss / AT4 (factory 2″ lift)	ReadyLIFT 66-3921	1.75″ + tubular UCAs	$529.95 at ReadyLIFT	The trim-specific kit, and the only leveling route to a stated 35″ tire
ZR2 / AT4X	ReadyLIFT 66-32150	1.5″ + tubular UCAs	$559.95 at ReadyLIFT	Built for the DSSV-damped flagships the other kits exclude

ARC-equipped Denali and High Country trucks are the fifth case: none of the four above is your kit as sold — ReadyLIFT’s ARC variant of the 1.5-inch kit is the 66-39151, and Rough Country sells a separate Adaptive Ride leveling kit. The Silverado hub explains that split in full.

Standard trucks, budget first: Rough Country 1323

Rough Country’s configurable 2-inch upper-strut spacer kit is the entry point for the T1XX platform: from $39.95 in spacer form, 2019–2026 Silverado and Sierra in 2WD and 4WD, with a wheel and tire table that tops out at 33-inch-class sizes (285/65R18; 285/55R20 on a 20×9 at +0 offset with no trimming note). Its real value in this guide is its exclusion list, which is the clearest one-page summary of this platform’s traps that any manufacturer publishes: no Denali or Denali Ultimate with Adaptive Ride Control, no AT4 / AT4X / Trail Boss / ZR2, no Super Cruise, no LD models, and the optional N3 struts do not fit diesels.

Who should NOT buy this: everyone in that previous sentence — which is a large share of well-optioned GM trucks. If your truck is a mainstream LT, RST or SLE without adaptive dampers, it is the cheapest legitimate level here. If it is anything fancier, keep reading.

Standard trucks, the conservative pick: ReadyLIFT 66-39150

ReadyLIFT’s 1.5-inch upper strut spacer ($149.95) is the kit our Silverado hub already carries as its verified row, and it earns its place here on the strength of its paperwork: a stated fitment of up to a 33×11.50R20 on a 20×9 wheel with 0 offset, with the honest asterisks attached — minor trimming to the felt liner may be required, and some wheels need a 6mm or greater spacer to clear the brake caliper. One and a half inches is also the gentlest geometry change in this guide, which is a real consideration on a truck you tow with.

Who should NOT buy this: ARC trucks (yours is the 66-39151 variant — a different SKU, not a footnote), Trail Boss and AT4 owners (excluded in terms), ZR2 owners, and owners of the 2019 Limited old-body truck, which is a K2XX in a 2019 jacket.

Trail Boss and AT4: ReadyLIFT 66-3921

This is the kit that makes the platform interesting. The Trail Boss and AT4 leave the factory with a 2-inch lift and a longer strut assembly, which is why every standard kit excludes them — and why ReadyLIFT built the 66-3921 ($529.95) specifically for them: 1.75 inches of additional front lift delivered with tubular upper control arms whose corrected ball-joint angles address the binding ReadyLIFT describes when a factory-lifted truck is lifted further. And because the starting point is already 2 inches up, the stated tire numbers are in a different league: max tire 295/65R20 on a 20×9 with 0 offset for the Trail Boss — a 35.1-inch tire, on a leveling kit, stated by the manufacturer. The AT4’s max on the same kit is smaller (275/60-20), because its fender opening differs; ReadyLIFT says so explicitly, and we carry both figures in the kit record below rather than averaging them into a lie.

Who should NOT buy this: standard-height truck owners — this kit is engineered around the factory lift you do not have — and AT4X / ZR2 owners, who are excluded and served by the next kit. Trail Boss owners re-using factory wheels should also note ReadyLIFT’s condition: the 285/75R18 option on stock wheels requires wheel spacers.

ZR2 and AT4X: ReadyLIFT 66-32150

The flagship off-road trims sit furthest from standard — Multimatic DSSV dampers, their own factory lift — and are excluded by everything else in this guide. ReadyLIFT’s answer is the 66-32150 ($559.95): a 1.5-inch kit with tubular upper control arms and an interlocking pre-load spacer, stating a 33×11.50 tire on a 20×9 with 0 offset, and a max of 295/60-20 with trimming. It also retains the factory turning radius, a detail that matters on trucks bought for trails.

Who should NOT buy this: anyone without a ZR2 or AT4X — and ZR2/AT4X owners who use Auto 4 Hi daily, since ReadyLIFT’s fitment notes say use of that feature is not recommended with this kit.

The exclusions are the review

Step back and the pattern is the platform: on the T1XX trucks, fitment is trim-shaped. Factory lift (Trail Boss / AT4 / ZR2 / AT4X) decides which catalogue you shop in; adaptive dampers (ARC, and MagneRide in Superlift’s listings) decide which SKU inside it; the 2019 model year decides which body you actually own. Every kit above states its answers to those three questions on its manufacturer page, which is exactly why these four made the guide and looser listings did not.

Two honest limits to close. First, the K2XX gap: the 2014–2018 trucks are the used-market volume play, and our verified dataset holds no K2XX-scoped kit yet — this guide covers 2019+ only, deliberately, and the Silverado hub says so in the same terms. Second, leveling is not the ceiling: if your goal is a 35-inch tire on a standard truck, no leveling kit here states it — the manufacturer-stated route is a 4-inch SST lift, and we worked it separately in how much lift to fit 35s on a Silverado 1500. Price either path whole — kit, labour, alignment, tires — with how much does it cost to lift a truck.

Sources for this guide (checked 2026-11-03): Rough Country’s 1323 product page; ReadyLIFT’s Chevrolet leveling kits page (66-39150 application and price); ReadyLIFT’s 66-3921 product page; ReadyLIFT’s 66-32150 product page.