Cognito Lift Leaf Spring Kit

 

The Cognito Lift Leaf Spring Kit is designed for Silverado and Sierra owners who want added rear lift, improved ride quality, and better suspension performance than traditional lift block setups. Available for select 1500 and HD applications, these complete leaf spring packs are built to replace the factory rear springs with a lift-specific solution.

Built from high-quality spring steel, this product uses a higher leaf count with thinner leaf material to create a more flexible, progressive leaf stack. This design helps provide a smoother spring rate curve through the suspension cycle, improving ride quality while supporting lifted truck stance and performance.

Additional features include military-wrapped spring eyes, diamond-cut inner leaf ends, and anti-friction inserts between the leaves for smoother movement and a quieter ride. The 1500 kit also includes a 2-degree pinion shim and heavy-duty 10.5-inch U-bolts, while the HD Deaver pack is secured with included center pins and retaining clips.

Engineered with vehicle-specific fitment, the Cognito Lift Leaf Spring Kit provides a clean rear suspension upgrade for compatible Chevy Silverado and GMC Sierra trucks.

Installation is designed as a bolt-in replacement on supported applications. The HD Deaver pack requires no cutting or welding, while the 1500 kit lists a 1.5-hour DIY install time.

Whether you're upgrading for lifted stance, improved rear suspension performance, reduced axle wrap, or smoother ride quality, the Cognito Lift Leaf Spring Kit delivers a premium rear leaf spring solution for Silverado and Sierra trucks. Now Available at LEER!

 

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Features & Specifications

Product Type: Rear Lift Leaf Spring Kit
Brand: Cognito / Deaver
Material: High-quality spring steel
Finish Options: Not specified
Mounting Type: Bolt-in rear leaf spring replacement
Fitment:

• Select Silverado/Sierra 1500, 2500, and 3500 2WD/4WD applications

Design: Complete replacement lift leaf spring pack
Key Dimensions: Application-specific
Functionality:

• Rear suspension lift
• Improved ride quality
• Reduced wheel hop and axle wrap compared to lift blocks
• Progressive spring performance
• Factory spring replacement

 

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Available Options

The Cognito Lift Leaf Spring Kit is available in:

Vehicle Fitments

• 2019–2025 Chevy Silverado 1500 2WD/4WD
• 2019–2025 GMC Sierra 1500 2WD/4WD
• 2011–2025 Chevy Silverado 2500/3500 2WD/4WD
• 2011–2025 GMC Sierra 2500/3500 2WD/4WD

Finish Options

• Not specified

Configurations

• Cognito 6-Inch Lift Leaf Spring Kit — 1500 Application
  Fits 2019–2025 Silverado/Sierra 1500 2WD/4WD
  Provides 3-position adjustable lift height from 5.75 inches to 6.5 inches. Includes two complete leaf spring packs, 2-degree pinion shim, and heavy-duty 10.5-inch U-bolts. Not compatible with trucks equipped with the OEM composite mono-leaf unless OEM-related components are sourced. 2025 GMC 1500 models require the Leaf Spring Top Plate Conversion
• Deaver 4-Inch Leaf Spring Pack K97 — 2500/3500 Application
  Fits 2011–2025 Silverado/Sierra 2500/3500 2WD/4WD
  Provides 4 inches of rear lift over stock height. Includes two Deaver 4-inch leaf spring packs. Bolt-in design with no cutting or welding required
  
  

Choose the correct Cognito Lift Leaf Spring Kit based on your truck’s year, model, drivetrain, and desired rear lift height.

 

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Why Choose the Cognito Lift Leaf Spring Kit?

This product is ideal for customers who want a complete rear spring replacement that adds lift while improving ride quality and suspension control.

• Adds rear lift height with complete replacement spring packs
• Improves ride quality using a progressive, higher-leaf-count spring design
• Reduces axle wrap and wheel hop compared to traditional lift block setups
• Uses durable spring features like military wrap, diamond-cut ends, and friction inserts
• Supports a cleaner lifted suspension setup for Silverado and Sierra applications

 

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What’s Included

• Complete rear lift leaf spring packs
• Application-specific center pins and retaining clips
• 2-degree pinion shim on 1500 application
• Heavy-duty 10.5-inch U-bolts on 1500 application
• Installation instructions

 

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Installation Notes

• Designed as a bolt-in rear leaf spring replacement
• HD Deaver application requires no cutting or welding
• 1500 application lists a 1.5-hour DIY install time
• Professional installation is recommended if you are unfamiliar with rear suspension work
• Verify correct lift height, drivetrain, model year, and spring configuration before ordering
• 1500 application is not compatible with OEM composite mono-leaf trucks unless the required
• OEM-related components are sourced
• 2025 GMC 1500 models require the Leaf Spring Top Plate Conversion

 

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Warranty Information

Cognito Warranty

Cognito products are backed by a limited lifetime warranty, covering defects in materials and workmanship.