Axiom Supply 2" Leveling Torsion Key Set | 1999-2006 Chevy Silverado/GMC Sierra 1500 6-Lug 4WD | SKU AXGMKEY99
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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 2" Leveling Torsion Key Set (SKU AXGMKEY99) is engineered to safely raise the front of 1999–2006 Chevrolet Silverado 1500 and GMC Sierra 1500 4WD, 6-lug, torsion bar trucks by up to 2 inches while maintaining factory-like drivability. Built from precision-forged steel, these re-clocked torsion keys offer a significant strength upgrade over OEM components — improved adjustability, enhanced suspension geometry, and long-lasting durability. Corrects factory rake and levels the stance for a more aggressive look and additional tire clearance. Direct bolt-on replacement for factory torsion bar keys. Intended to be installed alongside aftermarket upper control arms and compatible shocks or shock extensions for optimal performance, alignment range, and ride quality. Front-end alignment is mandatory after installation.
Component Specifications
| Spec | Detail |
|---|---|
| SKU / Part Number | AXGMKEY99 |
| Brand | Axiom Supply |
| Type | Torsion bar leveling key set |
| Front Lift | Up to 2" |
| Rear Lift | None — front leveling only |
| Construction | Precision-forged steel |
| Drivetrain | 4WD |
| Lug Pattern | 6-lug |
| Recommended Pairing | Aftermarket upper control arms and compatible shocks or shock extensions |
| Price | $109.99 |
| Application | Daily driving, towing, hauling, larger tires, off-road clearance |
| Sold As | Pair |
What Is and Is NOT Included
| Item | Included |
|---|---|
| 2x forged steel torsion key | ✓ |
| Upper control arms | ✗ NOT included — strongly recommended pairing, sold separately |
| Shocks or shock extensions | ✗ NOT included — sold separately (see AXGMSE99) |
Axiom 1999-2006 GM 1500 Leveling Product Family
| Product | SKU | Price | Contents |
|---|---|---|---|
| Leveling Key Set (this listing) | AXGMKEY99 | $109.99 | Torsion keys only |
| Stage 1 Leveling Kit | AXGM99STAGE1 | $149.99 | Torsion keys + shock extensions, bundled |
| Shock Extension Kit (standalone) | AXGMSE99 | $44.99 | Shock extensions only |
If you don't already have shock extensions, the Stage 1 bundle may offer better value than purchasing components separately.
Installation Notes
- Alignment mandatory. Full front-end alignment (caster, camber, toe) is required after installation. Torsion key indexing 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 — not just an optional add-on for heavy-duty use.
- Shock compatibility. Torsion key leveling extends front shock travel. Verify shock travel compatibility or add the AXGMSE99 shock extension kit.
- Torsion bar condition. Inspect torsion bars for cracks, corrosion, or fatigue before installation. Worn or cracked torsion bars should be replaced before indexing to a higher preload position.
- Torque specs. Torque all suspension hardware to OEM specification for 1999–2006 GM 1500.
- Re-torque. Re-torque all hardware after the first 500 miles of driving.
Verified Fitment
| Vehicle | Years | Status |
|---|---|---|
| Chevrolet Silverado 1500 4WD, 6-lug | 1999–2006 | ✓ |
| GMC Sierra 1500 4WD, 6-lug | 1999–2006 | ✓ |
| Silverado/Sierra 1500 | 2007 and newer | ✗ Coil spring front suspension — no torsion bar |
| Silverado/Sierra 1500, 4-lug | 1999–2006 | ✗ Different front suspension |
| Silverado/Sierra 2500HD/3500HD | Any | ✗ Different torsion bar key size — order AXGMKEY10 |
| Colorado/Canyon | Any | ✗ Different platform |
Critical Compatibility
| Configuration | Notes |
|---|---|
| 2007 and newer Silverado/Sierra 1500 | Does not fit — coil spring front suspension, no torsion bar |
| 2500HD/3500HD | Does not fit — different torsion bar key size, order AXGMKEY10 |
| Worn or cracked torsion bars | Replace before indexing to a higher preload position |
| Over-indexing beyond rated preload range | Can cause torsion bar fatigue and failure |
Common Questions
Do I need upper control arms with this kit?
Strongly recommended, not just optional. Axiom's own fitment guidance pairs this kit with aftermarket upper control arms and compatible shocks or shock extensions for proper alignment range and ride quality.
What's the difference between this and the Stage 1 kit?
This listing (AXGMKEY99) includes torsion keys only. The Stage 1 kit (AXGM99STAGE1) bundles the same torsion keys with shock extensions in one package at a combined price.
Does this fit my 2008 Silverado 1500?
No. The 2007+ generation switched to coil-spring front suspension with no torsion bar. This kit is for the 1999-2006 torsion bar platform only.
Do I need an alignment after installing this?
Yes, mandatory. Torsion key indexing changes front suspension geometry — do not drive until a full front-end alignment is completed.
The Obsidian Take
The AXGMKEY99 is for the 1999-2006 Silverado/Sierra 1500 4WD 6-lug owner who wants to correct factory rake and gain up to 2" of front lift on a torsion bar platform. Precision-forged steel, significant strength upgrade over OEM keys.
The honest recommendation: don't run this kit alone if you can avoid it. Axiom designed it to work alongside aftermarket upper control arms and a shock extension kit — pairing all three (or buying the Stage 1 bundle) delivers the alignment range and ride quality this system is actually built around.
Non-Returnable Notice: Once installed, this kit is non-returnable. Confirm torsion bar condition and lug pattern 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 strength of Axiom's upper control arm pairing recommendation. Obsidian Forged Auto Supply is an authorized Axiom Supply dealer. Manufacturer specifications are subject to change without notice.