Chevrolet Silverado 2500HD / GMC Sierra 2500HD Lift & Leveling Hub

The GM heavy-duties are the torsion-bar trucks: both generations on this hub — 2011–2019 and 2020+ — lift their front ends by re-indexing torsion keys rather than spacing struts, which is why their leveling kits look different from everything else on this site. The 2020+ generation also added the factory-lifted flagships: the Silverado HD ZR2 (from 2024) and the Sierra HD AT4X (from 2024), with the AT4 below them — Multimatic DSSV trucks that the mainstream kit makers treat as a separate platform.

We have not hands-on tested kits for this platform. Everything published here is tied to a cited source — manufacturer fitment pages, checked 2026-11-09 — and our method is explained in how we test and verify.

Check first: the splits that decide everything

• ZR2 and AT4X are excluded by name almost everywhere. ReadyLIFT and Rough Country both exclude them from their standard 2020+ kits: the factory 1.5-inch lift comes from a re-clocked torsion lower arm and DSSV dampers, and standard keys and knuckles do not apply. The one verified kit built for them is Cognito’s 110-P1313, which retains the DSSV dampers.
• Leveling means torsion keys, with a ceiling. ReadyLIFT caps its 2020+ key kit with a 26-inch wheel-center-to-fender limit and requires a torsion-bar unloading tool — cranking keys past the cap destroys ride quality and front-end angles.
• The 2011–2019 run is one fitment family. Kit makers span the GMT900/K2 HD years with single SKUs; the split that matters there is cab/bed configuration on the bigger kits, per the makers’ notes.

The verified ladder

Five kits: ReadyLIFT’s 2-inch forged-key level ($209.95) and Rough Country’s 3-inch kit with forged UCAs (from $849.95, stating a 35x12.50R20) for 2020+ trucks; Cognito’s 2.5-inch AT4X/ZR2 kit ($3,034.32, stating 37s on those trims); and for 2011–2019, ReadyLIFT’s 2.25-inch key level ($259.95, stating a 33-inch cap) and Rough Country’s 3.5-inch knuckle kit (from $1,149.95). The full list is in our Silverado 2500HD & Sierra 2500HD lift kits guide.

Your workflow on this platform

1. Name your generation: 2011–2019 or 2020+.
2. Check for ZR2 or AT4X badges before anything else — they shrink the catalogue to one verified kit.
3. Decide keys vs a full kit by your tire goal: the verified key kits state 33s (older) and 35s (2020+); bigger means knuckles and arms.
4. Convert your tire goal with the tire size calculator, sanity-check it against the tire size and lift height guide, and price the whole job with how much does it cost to lift a truck. Comparing the GM to its rivals? The F-250 Super Duty hub and Ram 2500 hub hold the other two ladders.

Sources for this hub (checked 2026-11-09): the five manufacturers’ product pages cited per kit in the HD lift kits guide — ReadyLIFT (66-30200, 66-3011), Rough Country (95830, 95730) and Cognito Motorsports (110-P1313).