8" ReadyLIFT Suspension BIG Lift Kit (Chevy/GMC 1500 2019-2023)

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ITEM# RLC131

MFG# 44-3985

• 2019-2023 GM 1500 4WD 8" Lift Kit Maintains the factory ride and handling. Delivers clearance for increased aftermarket tire sizes - up to 37x12.50 on 8-inch kit on 9" wide wheels with 0 offset with no trimming. -18 offset will require minor trimming. The proprietary lower strut clamshell design maintains factory geometry and retains the use of the factory strut. Tube steel upper control arms with maintenance-free pivot bushings and 1-ton ball joints. 3/16-inch thick steel plate cross members and skid plate. Anti-torsion boxed and gusseted plate steel differential drop brackets. Fabricated steel 5" rear lift blocks include integrated bump stop landings, offset pin, and provide proper pinion angle. Also includes a rear add-a-leaf for an additional lift. Includes premium Bilstein extended-length rear shocks. ✔
• Note: Use of Auto 4 Hi feature NOT recommended. ✔
• Note: NOT for use on Trail Boss, AT4, AT4X, ZR2, Diesel or Denali models. ✔
• Note: NOT compatible with Adaptive Ride Control or Multimatic suspension. NOT compatible with rear mono-leaf springs. ✔

ReadyLIFT now offers all-new Big Lift Kit for the new 2019-2023 Chevy Silverado and GMC Sierra 1500 trucks! Introducing the ReadyLIFT 8" Big Lift Kit engineered for incredible ride quality and superior handling performance. 44-3985 - 8"F-6.5" R Big Lift Kit - GM Silverado/Sierra 1500 4WD NOTE: Not for use on Trail Boss, AT4, AT4X, ZR2 or Denali models. NOTE: Not compatible with Adaptive Ride Control or Multimatic suspension.


NOTE: This GM 1500 kit is NOT COMPATIBLE with vehicles equipped with rear composite mono-leaf springs. The mono-leaf is easily identifiable the U-bolt is round/circular around the top of the leaf spring. This kit only works with vehicle equipped with traditional steel leaf springs identified by square U-bolts. The 44-3985 lift kit utilizes the very best in ReadyLIFT engineering with boxed steel front/rear cross members and full-width front skid plate constructed of thick 3/16" plate steel. New 1/4-inch boxed plate steel differential drop brackets feature a double gusset and boxed center rib to take the abuse of front differential torsional twisting. ReadyLIFT's new "clam-shell" style lower strut extension retains use of the factory struts and does not require strut rotation. These new clam-shell brackets utilizes ReadyLIFT's TCT lower bushings to provide a precise pivot point that maintains the factory ride. The addition of ReadyLIFT's proprietary new tubular upper control arms with TCT pivot bushings ensures prolonged upper control arm strength which is far superior to the OE stamped steel control arms. To lift the rear, new 5" tall fabricated steel rear blocks with integrated bump stop landings and an add-a-leaf has been added as well as new Bilstein 5100 series rear shocks.
With over nine months of engineering and development and more awesome features than we could possibly mention, the bottom line is this new Big Lift Kit is the best 8" lift kit you can install on a new body style 2019-2023 GM 1500 4WD truck! Thousands of miles of road and trail testing have proven ReadyLIFT's new 8" lift kit makes these new GM 1500 trucks ride better than stock! Recommended max tire with no trimming: 20x9 0 offset - 37x12.50 tire. *Max with trimming: 20x10 -18 offset - 37x12.50. Trimming requirements for larger than recommended wheel/tire include front valance, front felt liner edge, rear felt liner edge and front-rear well edge mud flap.


NOTE: Use of Auto 4 Hi feature not recommended. Features: Maintains the factory ride and handling. Delivers clearance for increased aftermarket tire sizes - up to 37x12.50 on 8-inch kit on 9" wide wheels with 0 offset with no trimming. -18 offset will require minor trimming. The proprietary lower strut clamshell design maintains factory geometry and retains use of the factory strut. Tube steel upper control arms with maintenance-free pivot bushings and 1-ton ball joints. 3/16-inch thick steel plate cross members and skid plate. Anti-torsion boxed and gusseted plate steel differential drop brackets. Fabricated steel 5" rear lift blocks include integrated bump stop landings, offset pin and provide proper pinon angle. Also includes rear add-a-leaf for additional 1.5" lift. Includes premium Bilstein extended-length rear shocks.

Recommended max tire with no trimming: 20x9 0 offset - 37x12.50 tire.

*Max with trimming: 20x10 -18 offset - 37x12.50.

Trimming requirements for larger than recommended wheel/tire include front valance, front felt liner edge, rear felt liner edge and front rear well edge mud flap.

Tire Size Note: ReadyLIFT wheel and tire fitment recommendations are typically based on Wheel Pros wheels and Nitto tires. Due to product differences among tire manufacturers, tire specifications and dimensions including, but limited to, overall diameter, rolling diameter, tread width, aspect ratio, lug pattern, sidewall construction and inflation pressure, will vary meaningfully by tire and wheel manufacturer. Every tire and wheel combination should be test fit prior to installation. Consult your local installer to learn more about the right tire fitment for your application.

Ride Quality Note: When lifting a vehicle and installing aftermarket wheels and tires, a tire manufacturer's construction and material quality can alter vehicle ride quality. When increasing a vehicle wheel and tire size, most larger aftermarket truck and SUV tires are 10-ply (or more) E tires compared to typical OEM 6-ply C tires. This more rigid sidewall construction increases the perception of suspension stiffness often described as ride harshness. The ride, handling, traction, noise, fuel economy, and wear differences between All-Season, All-Terrain, Mud-Terrain, or Trail-Terrain type tires can be significant. Please take into account tire and wheel choice will generally have a meaningful impact on the ride & handling experience.

Please read Instructions thoroughly and completely before beginning installation. Installation by a certified mechanic is recommended.

Estimated Installation Time: 11 Hours +/- 1 hour (excluding alignment and wheel/tire assembly)

View Instruction Sheet

· Heavy-duty front-rear cross members.
· Heavy-duty skid plate.
· Heavy-duty top mount strut extensions.
· Sway bar drop brackets.
· Heavy-duty fab steel rear lift blocks with bump stop landings.
· Heavy-duty cast iron lift knuckles engineered to retain factory quality geometry.
· Bilstein 5100 series rear shocks.
· All necessary hardware and instructions.

Local pickup welcome.

Some vehicles may require additional modifications or parts.

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