ReadyLift 4” Big Lift Kit 2019-2024 1500 Trail Boss / AT4

ReadyLift 4'' Big Lift Kit 2019-2024 1500 Trail Boss / AT4

Part Number: 44-39420

ReadyLift 4'' Big Lift Kit 2019-2024 1500 Trail Boss / AT4 is ReadyLift part 44-39420 for 2019-2025 Chevy/GMC 1500 4WD.

Features and Benefits

• ReadyLIFT now offers an all-new 4" Big Lift Kit for the new 2019-2024 Chevy Silverado Trail Boss and GMC AT4 1500 trucks engineered for incredible ride quality and superior…
• Includes ReadyGuard Powertrain Warranty.
• Note: Use of Auto 4 Hi feature not recommended.
• Not compatible with rear mono-leaf springs.
• Click here to learn how to determine if you have rear mono-leaf springs.
• Single Cab configuration has not been validated for fitment & drivability by ReadyLIFT.

Fitment

What’s Included

• Heavy-duty front-rear cross members and skid plate
• Heavy-duty top mount strut extensions and rear shock 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.
• All necessary hardware and instructions.

Tire and Wheel Fitment

• 44-39420 4" Lift Kit – Recommended max tire with no trimming: 20×9 0 offset – 35×12.50 tire.
• *Max with trimming: 20×10 -18 offset – 35×12.50 or 325/60R20
• *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: If using an 18-inch only -12mm offset works. A 18×9 with 0mm offset or higher does not work.
• 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…
• 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…

Important Notes

• Note: Use of Auto 4 Hi feature not recommended. Not compatible with rear mono-leaf springs. Click here to learn how to determine if you have rear mono-leaf springs. Single Cab configuration has not been validated for fitment & drivability by ReadyLIFT. Not for use on Diesel motor applications.
• Note: Do not recommend an 18" wheel due to fitment issues. A 18×9 with 0mm offset or higher does not work.
• NOTE: 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 for use on Diesel as we don't include an oil line relocation bracket.
• NOTE: 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.

Installation

Download Pdf Instructions