Axiom Supply Leveling Key Set | 2" Front Lift | 2020-2026 Chevy Silverado/GMC Sierra 2500HD & 3500HD T1XX | SKU AXGMKEY20
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Before ordering, verify your vehicle details, current setup, and SKU with OFAS fitment support so your upgrade matches your build.
Shipping & Delivery
Free shipping is available within the lower 48 U.S. states. Large or heavy items may ship by freight, and delivery timing can vary by warehouse, carrier, and product availability.
Fitment, Shipping & Product Support
The Axiom Supply Leveling Key Set (SKU AXGMKEY20) replaces the factory front suspension keys and lifts the front of 2020–2026 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD (T1XX platform) trucks by 2 inches — giving a flush, balanced stance while keeping the ride smooth and factory-like. Most heavy-duty trucks leave the factory with a forward "rake" to handle heavy loads; this kit corrects that look when the truck is empty and creates extra room for larger tires. Precision-forged steel construction, corrosion-resistant finish, direct bolt-on replacement for factory keys. Intended to be installed in conjunction with aftermarket upper control arms for proper performance. Lifetime warranty. Confirmed compatible across the full trim range, including AT4X and ZR2. Front-end alignment is mandatory after installation.
Component Specifications
| Spec | Detail |
|---|---|
| SKU / Part Number | AXGMKEY20 |
| Brand | Axiom Supply |
| Type | Front suspension leveling key set |
| Front Lift | 2" — fixed, not adjustable |
| Rear Lift | None — front leveling only |
| Construction | Precision-forged steel — corrosion-resistant finish |
| Recommended Pairing | Aftermarket upper control arms |
| Platform | T1XX |
| Engine | 6.6L |
| Trim Compatibility | Confirmed across full range including AT4X and ZR2 |
| Warranty | Lifetime — Axiom No-Nonsense Warranty |
| Application | Daily driving, towing, hauling — corrects factory front-to-rear rake |
| Sold As | Pair |
What Is and Is NOT Included
| Item | Included |
|---|---|
| 2x forged steel leveling key | ✓ |
| Upper control arms | ✗ NOT included — recommended pairing, sold separately |
| Shock extensions | ✗ NOT included — sold separately if needed for your lift height |
GM HD Leveling Key Platform Guide
| Platform | Years | SKU |
|---|---|---|
| GMT800/GMT900 | 2001–2010 | AXGMKEY10 |
| K2XX | 2011–2019 | AXGMKEY11 |
| T1XX (this listing) | 2020–2026 | AXGMKEY20 |
Installation Notes
- Alignment mandatory. Full front-end alignment (caster, camber, toe) is required after installation. Leveling key installation changes front suspension geometry — do not drive until aligned.
- Pair with upper control arms. This kit is intended for use alongside aftermarket upper control arms for proper alignment range and suspension geometry.
- Caster correction. A 2" front lift on the T1XX platform will reduce positive caster. A caster correction kit or adjustable upper control arms is recommended to restore factory caster angle, especially for towing or highway use.
- Shock compatibility. Leveling keys extend front shock travel. Verify front shock travel is compatible with your achieved lift height, or add a compatible shock or shock extension.
- Suspension inspection. Inspect front suspension components for wear before installation. Replace worn ball joints, tie rod ends, or control arm bushings before leveling.
- Torque specs. Torque all suspension hardware to OEM specification for 2020–2026 GM 2500HD/3500HD T1XX.
- Re-torque. Re-torque all hardware after the first 500 miles of driving.
Verified Fitment
| Vehicle | Years | Status |
|---|---|---|
| Chevrolet Silverado 2500HD/3500HD — WT, SLT, SLE, LTZ, LT, High Country, Denali, Custom, Pro, Ultimate, AT4X, ZR2 | 2020–2026 | ✓ |
| GMC Sierra 2500HD/3500HD AT4 | 2020–2026 | ✓ |
| Silverado/Sierra 2500HD/3500HD | 2019 and earlier | ✗ K2XX platform — order AXGMKEY11 |
| Silverado/Sierra 1500 | Any | ✗ Different platform |
Critical Compatibility
| Configuration | Notes |
|---|---|
| 2019 and earlier GM HD trucks | Does not fit — K2XX platform uses different front suspension geometry, order AXGMKEY11 |
| Aftermarket upper control arms | Recommended pairing for proper alignment range and suspension geometry |
| Worn suspension components | Replace ball joints, tie rod ends, or control arm bushings before leveling |
Common Questions
Does this fit my AT4X or ZR2?
Yes, confirmed across the full trim range for this platform.
Is the lift adjustable?
No. This is a fixed 2" front lift, not an adjustable system.
Do I need upper control arms with this kit?
Recommended by Axiom for proper alignment range and suspension geometry — pairing the two together gives the best overall result.
Do I need an alignment after installing this?
Yes, mandatory. Leveling key installation changes front suspension geometry — do not drive until a full front-end alignment is completed.
The Obsidian Take
The AXGMKEY20 is for the 2020-2026 Silverado/Sierra 2500HD/3500HD owner — any trim, including AT4X and ZR2 — who wants to correct factory rake and gain a fixed 2" of front lift on the T1XX platform. Precision-forged steel, lifetime warranty, confirmed compatible across the full trim lineup.
The honest recommendation: pair this with aftermarket upper control arms rather than running it alone. Axiom designed this kit with that pairing in mind for proper alignment range and suspension geometry at the new ride height.
Non-Returnable Notice: Once installed, this kit is non-returnable. Confirm platform generation and trim before ordering. A full front-end alignment is required after installation.
⚠️ California Proposition 65 Warning: This product may expose you to chemicals known to the State of California to cause cancer or reproductive harm. For more information visit P65Warnings.ca.gov.
Manufacturer Data Disclaimer: Specifications sourced from Axiom Supply and authorized distributor documentation. Input data incorrectly described variable lift output — confirmed fixed 2" lift, not adjustable. Obsidian Forged Auto Supply is an authorized Axiom Supply dealer. Manufacturer specifications are subject to change without notice.