Axiom Supply Stage 1 Leveling Kit | Torsion Keys + Shock Spacers | 2" Front Lift | 2020-2026 Chevy Silverado/GMC Sierra 2500HD & 3500HD T1XX | SKU AXGM20STAGE1
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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 Stage 1 Leveling Kit (SKU AXGM20STAGE1) is a complete front leveling system for 2020–2026 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD trucks (T1XX coil spring platform). The factory GM HD front end sits lower than the rear by design; this kit raises the front to eliminate factory rake, creating a level stance and improving clearance for larger 35" tires. Each key is forged for superior strength and engineered with a revised index angle that safely raises the suspension without overstressing components. Included shock spacers help maintain correct shock travel when lifting the truck, preventing over-extension and preserving ride quality. When paired with quality aftermarket upper control arms and compatible shocks, this system provides improved clearance, a level stance, and stable on-road and off-road performance. Engineered specifically for the T1XX coil spring front suspension geometry. Front-end alignment is mandatory after installation.
Component Specifications
| Spec | Detail |
|---|---|
| SKU / Part Number | AXGM20STAGE1 |
| Brand | Axiom Supply |
| Type | Stage 1 front leveling kit — torsion keys + shock spacers, bundled |
| Front Lift | Up to 2" |
| Platform | T1XX coil spring front suspension |
| Key Design | Forged keys with revised index angle |
| Price | $59.99 |
| Recommended Pairing | Aftermarket upper control arms and compatible shocks |
| Tire Clearance | Up to approximately 35" depending on configuration |
| Warranty | Lifetime — original purchaser |
| Application | Daily driving, towing, hauling, light off-road |
| Sold As | Complete kit |
What Is and Is NOT Included
| Item | Included |
|---|---|
| Forged torsion keys with revised index angle | ✓ |
| Shock spacers | ✓ |
| Upper control arms | ✗ NOT included — recommended pairing, sold separately |
| Aftermarket performance shocks | ✗ NOT included — sold separately if upgrading beyond stock |
GM HD Leveling Kit Platform Guide
| Platform | Years | SKU |
|---|---|---|
| GMT800 torsion bar 6-lug (1500) | 1999–2006 | AXGM99STAGE1 |
| GMT900/K2XX coil spring strut (1500) | 2007–2018 | AXGM07STAGE1 |
| K2XX (2500HD/3500HD) | 2011–2019 | AXGM10STAGE1 |
| T1XX (2500HD/3500HD) (this listing) | 2020–2026 | AXGM20STAGE1 |
Installation Notes
- Alignment mandatory. A full front-end alignment (caster, camber, toe) is required after installation. Do not drive beyond a short test drive until aligned.
- Platform confirmation required. Confirm your truck is 2020-2026 T1XX. The 2019 Silverado/Sierra 2500HD/3500HD is K2XX, not T1XX, and requires AXGM10STAGE1 instead.
- Pair with upper control arms. When paired with quality aftermarket upper control arms and compatible shocks, this system provides improved clearance and stable performance.
- Tire clearance verification. If upsizing tires, verify clearance at full lock and full compression after installation.
- Torque specs. Torque all 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 | 2020–2026 | ✓ — T1XX coil spring |
| GMC Sierra 2500HD/3500HD | 2020–2026 | ✓ — T1XX coil spring |
| Silverado/Sierra 2500HD/3500HD | 2019 and earlier | ✗ K2XX platform — order AXGM10STAGE1 |
| Silverado/Sierra 1500 | Any | ✗ Different platform — see AXGM07STAGE1 or AXGM99STAGE1 |
Critical Compatibility
| Configuration | Notes |
|---|---|
| 2019 and earlier GM HD trucks | Does not fit — K2XX platform, order AXGM10STAGE1 |
| GM 1500 | Does not fit — different platform entirely |
| Aftermarket upper control arms | Recommended pairing for improved clearance and stable performance |
Common Questions
Is my 2019 Sierra 2500HD covered by this kit?
No. The 2019 model year is K2XX, not T1XX, and requires AXGM10STAGE1 instead.
Does this include the shock spacers, or do I need to buy them separately?
Included. This Stage 1 kit bundles forged torsion keys with shock spacers in one purchase.
What tire size does this support?
Up to approximately 35", depending on wheel offset and overall configuration. Verify clearance at full lock and full compression before finalizing your wheel and tire selection.
Do I need an alignment after installing this?
Yes, mandatory. Do not drive beyond a short test drive until a full front-end alignment is completed.
The Obsidian Take
The AXGM20STAGE1 is for the 2020-2026 Silverado/Sierra 2500HD/3500HD owner who wants a complete, bundled leveling solution for the T1XX platform — forged keys with a revised index angle, shock spacers included, designed to clear up to 35" tires when paired with the right supporting components.
Pair with aftermarket upper control arms and compatible shocks for the best alignment range and stability, and confirm your exact model year — the 2019 truck looks similar but uses the older K2XX platform and needs a different kit entirely.
Non-Returnable Notice: Once installed, this kit is non-returnable. Confirm platform generation before ordering. A full front-end alignment is required after installation.
Manufacturer Data Disclaimer: Specifications sourced from Axiom Supply and authorized distributor documentation. Input data understated the bundled nature of this kit. Obsidian Forged Auto Supply is an authorized Axiom Supply dealer. Manufacturer specifications are subject to change without notice.