2019-2024 GM 1500 8" Big Lift Kit w/ Falcon 2.1 Shocks (44-39806)

Description

ReadyLIFT's reengineered 8" Big Lift Kit (8" front, 6.5" rear) for the 2019-2024 Chevy Silverado 1500 and GMC Sierra 1500 4WD. Clam-shell lower strut extensions with TCT bushings retain the factory struts, and tubular upper control arms replace the OE stamped steel arms. The engineering updates developed for the 2025 trucks carry over, with redesigned steering knuckles, retained factory Auto 4WD and revised geometry to help prevent driveline vibration. Fabricated 5" rear blocks and an add-a-leaf lift the rear, paired with new Falcon 2.1 Monotube rear shocks.

Part Number: 44-39806 (supersedes 44-39805)

Features

• Proprietary lower strut clamshell design maintains factory geometry and retains the factory strut
• Tube steel upper control arms with maintenance-free pivot bushings and 1-ton ball joints
• 3/16" thick steel plate cross members and full-width skid plate
• Anti-torsion boxed and gusseted plate steel differential drop brackets
• Fabricated steel 5" rear lift blocks with integrated bump stop landings and offset pin for proper pinion angle
• Rear add-a-leaf for an additional 1.5" of lift
• Falcon 2.1 Monotube extended-length rear shocks (2.3" aluminum body, 3/4" shaft)
• Redesigned steering knuckles for an improved turning radius
• Retains factory Auto 4WD functionality
• Revised suspension geometry helps prevent driveline vibration
• Includes ReadyGuard Powertrain Warranty

Tire Fitment:

• Recommended max tire with no trimming: 20x9 0 offset - 37x12.50 tire
• *Max with trimming: 20x10 -18 offset - 37x12.50

Notes

• Use of Auto 4 Hi feature not recommended
• Not for use on Trail Boss, AT4, AT4X, ZR2, Diesel or Denali models
• Not compatible with Adaptive Ride Control (ARC) or Multimatic suspension
• Not compatible with rear mono-leaf springs
• Not compatible with Super Cruise
• Single Cab configuration has not been validated for fitment & drivability by ReadyLIFT
• Late 2024 trucks with round rear U-bolts require U-bolt kit 67-35150UB