ReadyLift 42-39640 Suspension Lift Kit

ReadyLift 42-39640 Suspension Lift Kit

ReadyLIFT proudly introduces the next evolution in full-size truck performance - our 6” MAX3.3 Suspension System, now available for 2019–2024 Chevy Silverado & GMC Sierra 1500 4WD trucks. Designed for GM enthusiasts who demand top-tier ride quality, aggressive stance, and premium off-road capability, this new system is engineered around the all-new Falcon 3.3 Front Remote Reservoir Coilover and Rear Piggyback Shocks—built for comfort, control, and custom tuning at your fingertips.MAX3.3 System Highlights:Falcon 3.3 Fast Adjust Coilovers & Rear Shocks Premium remote reservoir dampers with 8-position micro tuning and 3-position Fast Adjust Knob. Quickly switch between Soft, Custom, or Firm for unmatched ride personalization on or off the road. Heavy-Duty Shock Architecture Engineered with 6061-T6 Aluminum construction, Red Line High VI shock oil, and Falcon’s Volume Optimized Damping (VOD) to withstand punishing off-road conditions. More Strength, More Control Built with heavy-duty DOM tubular steel upper control arms featuring high-angle proprietary ball joints, this kit provides superior articulation, enhanced durability, and extended component life—something generic lift kits just can’t match.Heavy-Duty Lift Components Boxed steel front and rear crossmembers Full-width 3/16” & 8” front skid plate 1/4” boxed plate steel differential drop brackets with double gussets and a center rib for added strength 5” fabricated rear lift blocks with integrated bump stop landings Factory Ride and Turning Radius Retained Enjoy all the benefits of a lifted truck—aggressive stance, increased clearance—without sacrificing comfort or drivability. Wheel & Tire Fitment:Recommended (no trimming): 20x9, 0 offset wheels with 35x12.50 tires Max Fitment (with trimming): 20x10, -18 offset wheels with 35x12.50 or 325/60R20 tires Note: May require trimming of front valance, inner fender liners, and mud flaps Thousands of miles of testing on highways, trails, and everything in between prove that this new ReadyLIFT system doesn’t just lift—it elevates performance. This is the lift kit that makes your GM 1500 drive better than stock.NOTES:  If used on a AT4 or Trail Boss you will get a net a 4" over factory stock height. If used on a AT4X or ZR2 you will net a 4" over factory stock height and will remove the Multimatic shocks and lose that functionality.Note: Use of Auto 4 Hi feature not recommended. Not for use on Diesel as we don’t include an oil line relocation bracket or Denali models. Not compatible with Adaptive Ride Control or keeping Multimatic suspension. Not compatible with rear mono-leaf springs. Click here to learn how to determine if you have rear mono-leaf springs. Not compatible with Super Cruise. Single Cab configuration has not been validated for fitment & drivability by ReadyLIFT.

• 6” MAX3.3 System Highlights:
• Falcon 3.3 Fast Adjust Coilovers & Rear Shocks
• Premium remote reservoir dampers with 8-position micro tuning and 3-position Fast Adjust Knob. Quickly switch between Soft, Custom, or Firm for unmatched ride personalization on or off the road.
• · Heavy-duty DOM tubular steel upper control arms featuring high-angle proprietary ball joints
• Heavy-Duty Lift Components
• Boxed steel front and rear crossmembers
• Full-width 3/16” & 8” front skid plate
• Factory Ride and Turning Radius Retained
• Wheel & Tire Fitment:
• Recommended (no trimming):
• 20x9, 0 offset wheels with 35x12.50 tires
• Max Fitment (with trimming):
• 20x10, -18 offset wheels with 35x12.50 or 325/60R20 tires
• Note: May require trimming of front valance, inner fender liners, and mud flaps
• NOTES:  If used on a AT4 or Trail Boss you will get a net a 4" over factory stock height. If used on a AT4X or ZR2 you will net a 4" over factory stock height and will remove the Multimatic shocks and lose that functionality.
• Note: Use of Auto 4 Hi feature not recommended. Not for use on Diesel as we don’t include an oil line relocation bracket or Denali models. Not compatible with Adaptive Ride Control or keeping Multimatic suspension.
• Not compatible with rear mono-leaf springs. Click here to learn how to determine if you have rear mono-leaf springs. Not compatible with Super Cruise. Single Cab configuration has not been validated for fitment & drivability by ReadyLIFT.

Weight: 300 lbs
Dimensions: 48 x 25 x 13 IN

⚠ WARNING: This product can expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information visit www.P65Warnings.ca.gov

View Installation Instructions (PDF)