2020-2026 Duramax 2500HD/3500HD 3" SST Lift Kit w/ Falcon 2.1 Monotube Shocks (69-30321)

ReadyLIFT has upgraded its popular 3" SST Lift Kit for 2020+ Chevrolet Silverado and GMC Sierra 2500HD/3500HD trucks with the all-new Falcon 2.1 Monotube shocks, delivering enhanced ride quality, improved durability, and increased off-road performance. The Falcon 2.1 shocks feature a large 2.3" 6061-T6 aluminum shock body for improved heat dissipation and impact resistance, paired with a precision-honed internal surface engineered for smooth, consistent damping. A massive 3/4" induction-hardened chrome-plated shaft resists rock damage, corrosion, and shaft deflection under demanding off-road and towing conditions.

The proven ReadyLIFT SST system retains its heavy-duty fabricated upper control arms, forged torsion keys, and robust rear lift components to maintain important factory ride characteristics, towing confidence, and clearance for up to 35" tires. Whether towing, daily driving, or exploring off-road terrain, the upgraded 3" SST Lift Kit delivers the aggressive stance, premium ride quality, and durability GM HD owners expect from ReadyLIFT and Falcon Performance Shocks.

Part Number: 69-30321

• NEW Falcon 2.1 Monotube shocks, front and rear
• Large 2.3" 6061-T6 aluminum shock body for improved cooling and performance
• Massive 3/4" induction-hardened chrome-plated shock shaft for strength and durability
• Heavy-duty fabricated upper control arms included
• Forged torsion keys and robust rear lift components
• Provides 3" of front lift and 1" of rear lift
• Maintains important factory towing and payload capability
• Clearance for tires up to 35"

• 35" maximum tire diameter (35x12.50 / 325/60R20)
• No-trim fitment: 35x12.50 tires on 20x9 wheels, 0 offset
• Maximum with minor trimming: 35x12.50 tires on 20x10 wheels, -18 offset
• Some fender liner trimming may vary between Silverado and Sierra applications

• Falcon 2.1 Monotube front shocks
• Falcon 2.1 Monotube rear shocks
• Heavy-duty fabricated upper control arms
• Forged torsion keys
• Rear lift blocks and mounting hardware

• Estimated installation time: approximately 5.5 hours. Professional installation recommended.
• ReadyLIFT Suspension Inc. and/or Dirty Diesel Customs are NOT responsible for any damage or failure resulting from improper installation.