2011-2026 Duramax HD Shock Extension Kit (AXGMSE11)

Fits

Note: Fits 8-Lug HD Models ONLY! Intended for use with OE or OE-equivalent front shocks ONLY.

The Axiom Heavy-Duty Shock Extension Kit is the professional-grade solution designed to restore proper shock travel on late-model GM HD trucks. By extending the mounting point, these precision-machined spacers let you achieve a leveled stance without overextending the shock piston, preserving the factory ride quality you don't want to lose. Axiom spacers are built for the heavy-duty stress of a 2500 HD or 3500 HD frame and finished in a durable black powder coat to resist corrosion in even the harshest environments. This kit is mandatory when installing leveling keys if you plan to keep OE-length shocks.

*Does not fit the AT4X and ZR2 model trucks with DSSV shocks.

Part Number: AXGMSE11

• Precision-machined construction for maximum strength and consistency
• Extends usable range of OE-length shocks for leveled applications
• Maintains factory-like ride quality and suspension travel
• Durable black powder-coated finish for superior corrosion resistance
• Essential component for properly leveled HD front ends

• 1 x Shock Extension kit

• Intended for use with OE or OE-equivalent front shocks ONLY.
• NOT compatible with plus-length aftermarket shocks.
• Does NOT fit AT4X or ZR2 models equipped with DSSV shocks.
• Recommended for use with aftermarket upper control arms.