2019-2024 GM 1500 4" SST Lift Kit (69-39400)

Fits

Note: These will not fit late-model 2024 or 2025 applications with round U-bolts.

Give your Silverado or Sierra the aggressive, leveled-up stance it deserves without sacrificing that smooth factory ride quality. This no-cut SST system is engineered to handle the torque of your Duramax while maintaining perfect suspension geometry and providing the clearance needed for beefier 35-inch rubber. It’s the ultimate solution for owners who want a bold, daily-drivable look that still performs when there’s a trailer hooked up to the hitch.

TIRE/WHEEL SIZING GUIDE

Before ordering a ReadyLIFT GM1500 Lift Kit, please check the rear leaf spring for kit compatibility.

IMPORTANT: PLEASE READ ADDITIONAL FITMENT INFORMATION

Part Number: 69-39400

Superseded Part Number: 69-3940

• 4" front/3" rear lift
• Heavy-Duty Tubular Control Arms
• Maintenance-Free TCT Pivot Bushings
• Precision CNC-Machined Billet Spacers
• Maximum CV Axle Protection
• No-Cut Bolt-On Installation
• Retains Factory ARC Compatibility
• Rugged Cast Iron Rear Blocks

• 2 x UCA with maintenance-free TCT pivot bushings, heavy-duty ball joints, and with ARC adaptor
• 2 x Fab steel heavy-duty strut extensions
• 2 x CNC-machined billet aluminum spring pre-load spacers
• 4 x Laser Cut Washers
• 1 x 3" Cast Block w/ U-Bolts
• 1 x ARC Relocation Bracket

• 20x9 0 offset 295/65 R20 - 2019-2022 Chevy Max tire size.
• 20x9 0 offset 295/55-R20 - 2019-2023 GMC & 2023 Chevy Max tire size
• Vehicles with Mono-leaf rear springs require (67-39530UB)
  
• Using U-bolt part number (67-35120UB) will allow this kit to fit 2025 applications. 
• Use of the Auto 4 Hi feature is not recommended
• Not compatible Trail Boss, ZR2, and AT4 / AT4X, and 2019 classic body LD or Limited
• Not compatible with Super Cruise.  Single Cab configuration has not been validated for fitment & drivability by ReadyLIFT
• Not compatible with 2019 Limited OLD Body Style
• NOT intended for off-road use or abuse
• Some trimming may be required depending on tire tread design
• 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.
• 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.

Click Here For Instructions

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