Kryptonite Stage 3 Leveling Kit with Fox 2.5 Shocks for 2019+ Chevy Silverado/GMC Sierra 1500 AT4/Trail Boss

Fits:

• 2019+ Chevrolet Silverado 1500 Trail Boss
• 2019+ GMC Sierra 1500 AT4

Important Fitment Information:

• Not compatible with vehicles originally equipped with Adaptive Ride Control (ARC)
• Not compatible with vehicles equipped with Super Cruise
• FOX 2.5 Performance Series coil-overs provide approximately 1.5” of additional front lift
  
• Allows clearance for up to a 33” tire (actual fitment may vary based on tire design and wheel specifications)

Tire Clearance Notes:

• When used with OEM wheels, maximum recommended tire tread width is 11.2”
• Tires exceeding 11.2” tread width will require wheels with 5.6” backspacing or less

Features:

• Premium Suspension Upgrade – Combines FOX 2.5 Performance Series coil-overs, FOX rear Performance Series shocks, and Kryptonite Upper Control Arms into a complete bolt-on suspension system.
• 1.5” Additional Front Lift – FOX 2.5 coil-overs are preset to provide approximately 1.5” of additional front lift while maintaining excellent ride quality and vehicle control.
• FOX 2.5 Performance Series Coil-Overs – Larger 2.5” shock bodies increase oil capacity and improve heat dissipation for consistent performance in demanding conditions.
• Internal Floating Piston (IFP) Technology – Separates shock oil from the nitrogen charge to reduce aeration and maintain predictable damping performance.
• Impact-Extruded Aluminum Shock Bodies – 6061-T6 clear anodized aluminum construction resists corrosion while efficiently dissipating heat.
• Race-Developed High-Flow Pistons – FOX performance valving delivers improved control, comfort, and stability on-road and off-road.
• Heavy-Duty Boxed Upper Control Arms – Laser-cut and robotically welded steel construction provides exceptional strength and durability.
• Bolt-On Upper Ball Joints – Serviceable design allows individual ball joint replacement without replacing the complete control arm.
• Optimized Suspension Geometry – Upper control arms help maintain proper ball joint angles and suspension travel at the increased ride height.
• Increased Tire Clearance – Allows clearance for up to a 33” tire when used with the recommended wheel specifications.
• Direct Bolt-On Installation – No cutting, welding, or permanent modifications required.

• Greaseable By Design – Apply 4–6 pumps during installation, then maintain with approximately 2–4 pumps every 5,000–7,000 miles. Designed to purge contaminants without overfilling the boot.

Description:

The Kryptonite Stage 3 FOX 2.5 Suspension Kit is engineered specifically for 2019+ Chevrolet Silverado 1500 Trail Boss and GMC Sierra 1500 AT4 owners seeking premium ride quality, improved vehicle control, and increased capability both on and off-road. This complete suspension package combines FOX 2.5 Performance Series front coil-overs, matched FOX rear Performance Series shocks, and Kryptonite’s heavy-duty boxed upper control arms to create a suspension system capable of handling everything from daily driving and towing to demanding off-road conditions.

At the heart of the system are FOX 2.5 Performance Series coil-overs, featuring large-diameter impact-extruded 6061-T6 aluminum bodies that increase oil capacity and cooling efficiency compared to smaller shock designs. FOX’s Internal Floating Piston (IFP) monotube technology separates shock oil from the high-pressure nitrogen charge, reducing aeration and ensuring consistent damping performance under heavy use. Race-developed high-flow pistons and application-specific valving provide a comfortable ride on the street while maintaining excellent control over rough terrain.

To complement the upgraded FOX suspension, Kryptonite Upper Control Arms are included to maintain proper suspension geometry and ball joint operating angles at the increased ride height. Manufactured from laser-cut steel and robotically welded into a heavy-duty boxed design, these control arms provide the strength, reliability, and serviceability expected from Kryptonite Products.

Whether your truck is used for commuting, towing, overlanding, or weekend adventures, this complete suspension package delivers improved comfort, increased confidence, and the durability needed to tackle demanding conditions while providing clearance for up to a 33” tire.