2019-2024 GMC 1500 4" Lift Kit (44-39420)

Fits

A significant amount of engineering and development has gone into this specialty 4" lift kit. Everything from the skid plate, drop differential brackets, HD cast iron knuckles, and strut extensions eliminate the common ball joint binding issue these 1500 models have. Effectively providing you with a durable lift kit that will never compromise factory geometry, just give you that increase in ground clearance and improved articulation for any off-road adventure!

Part Number: 44-39420

• HD tubular steel upper control arms
• TCT maintenance-free pivot bushings
• HD 1-ton ball joints
• CNC-machined billet aluminum top & bottom mount strut spacers
• Maintains factory geometry 

Tire Fitment: 

• AT4 - Max tire 275/60-20, 20x9 0 offset wheel
• Trail Boss - Max tire 295/65-20, 20x9 0 offset wheel
• If re-using factory wheels on a Trail Boss, you can run max tire size 285/75R18 with NO trimming!
• AT4 and Trail Boss do not fit the same size tire. This is due to the difference in the front fender opening design

• These will not fit late-model 2024 or 2025 applications that have round U-bolts.
• Using U-bolt part number 67-35150UB will allow this kit to fit 2025 applications. 
• Not compatible with Sierra AT4X or Silverado ZR2 Edition
• Not for use on Diesel motor applications
• Single Cab configuration has not been validated for fitment & drivability by ReadyLift

• ReadyLIFT Suspension Inc. and/or Dirty Diesel Customs are NOT responsible for any damage or failure resulting from improper installation.
• Click here for installation instructions