Axiom Supply Shock Extension Kit | 0-2 in Front Lift | 1999-2006 GM 1500 6-Lug

Axiom Shock Extension Kit | 0–2" Front Lift | 1999–2006 Chevy Silverado / GMC Sierra 1500 6-Lug

The Axiom Shock Extension Kit (SKU: AXGMSE99) is engineered for 1999–2006 Chevrolet Silverado 1500 and GMC Sierra 1500 6-lug trucks running 0–2" of front lift via a leveling key set or mild lift system. When the front end is raised, the factory shock mounts move relative to the shock body — if the shock is not repositioned, it can operate outside its designed travel range, causing over-extension at full droop, premature shock wear, and reduced damping performance. These extensions reposition the factory shocks to maintain correct travel and preserve ride quality. High-strength metal construction with corrosion-resistant finish. Direct bolt-on installation — no cutting or modification required.

Verified Fitment (OFAS Standard)

• Chevy Silverado 1500 6-Lug (Front): 1999–2006 — 0–2" front lift
• GMC Sierra 1500 6-Lug (Front): 1999–2006 — 0–2" front lift

Does NOT fit: 2007 or newer Silverado/Sierra 1500 (switched to coil spring front suspension — different shock mounting geometry). Does not fit 4-lug Silverado/Sierra 1500 (different front suspension). Does not fit trucks with more than 2" of front lift — a longer extension is required. Does not fit 2500HD or 3500HD (different shock mounting — see AXGMSE11 for 2011–2026 GM HD).

Technical Specifications

• SKU: AXGMSE99
• Type: Shock extension kit
• Lift Range: 0–2" front lift
• Construction: High-strength metal — corrosion-resistant finish
• Installation: Direct bolt-on — no cutting or modification required
• Weight: 3 lbs
• Application: 1999–2006 GM 1500 6-lug — leveling key sets and mild front lift systems

When to Use Shock Extensions

• After installing a leveling key set (AXGMKEY99) that raises the front suspension 0–2"
• When factory shocks are topping out or over-extending at full droop after a leveling installation
• When upgrading to aftermarket shocks that require repositioning for correct travel at the new ride height

Installation Notes

• Lift height confirmation: This kit is designed for 0–2" of front lift. Do not install on trucks with more than 2" of front lift — a longer extension is required for correct shock travel at higher lift heights.
• 6-lug confirmation required: Confirm your 1999–2006 Silverado/Sierra 1500 is the 6-lug configuration before ordering. 4-lug models use different front suspension geometry.
• Shock travel check: After installation, verify shock travel at full droop and full compression. The shock should not top out at full droop or bottom out at full compression with the extension installed.
• Pairing recommendation: Install shock extensions at the same time as the leveling key set (AXGMKEY99) to ensure correct shock travel at the new ride height from the first drive.
• Torque specs: Torque all shock mounting hardware to OEM specification for 1999–2006 GM 1500 (verify in GM service manual or Axiom install sheet).
• Re-torque: Re-torque all hardware after the first 500 miles of driving following installation.

Installation Warning

Do not install on 2007 or newer Silverado/Sierra 1500 — coil spring front suspension uses different shock mounting geometry. Do not install on 4-lug models. Do not install on trucks with more than 2" of front lift — incorrect extension length will not restore proper shock travel and can cause shock damage. Verify shock travel at full droop after installation before driving. Once installed, the kit is non-returnable.

What is your current front lift height (confirm 0–2"), and are you pairing this with the AXGMKEY99 leveling key set — confirm 1999–2006 6-lug platform before ordering?