ReadyLIFT 4.0" SST Lift Kit | 2019–2024 Chevy Silverado & GMC Sierra 1500
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Before ordering, verify your vehicle details, current setup, and SKU with OFAS fitment support so your upgrade matches your build.
Shipping & Delivery
Free shipping is available within the lower 48 U.S. states. Large or heavy items may ship by freight, and delivery timing can vary by warehouse, carrier, and product availability.
Fitment, Shipping & Product Support
ReadyLIFT 4.0" SST Lift Kit | 2019–2024 Chevy Silverado & GMC Sierra 1500
Is This for You?
You're running a 2019–2024 Chevy Silverado or GMC Sierra 1500 and you want a full 4" of front lift with corrected geometry, ARC compatibility, and room for 295-series tires — all without cutting a single piece of sheet metal. You've outgrown leveling kits and you need a complete, engineered system that works with or without Adaptive Ride Control suspension. The ReadyLIFT 69-39400 replaces the 69-3940 and is the definitive no-cut 4" SST solution for the T1 GM 1500 platform.
The Result
Four inches of front lift achieved through heavy-duty laser-cut fabricated steel top-mount strut extensions with an offset design that corrects strut and wiper seal angles, paired with CNC-machined billet aluminum pre-load spacers. Three inches of rear lift via OE-style cast iron lift blocks with built-in axle pad locating ears and new longer U-bolts delivers a subtle, aggressive rake that looks purpose-built with the GM body lines. DOM steel tubular upper control arms with optimized ball joint pivot angles and maintenance-free TCT pivot bushings restore proper suspension geometry at the new ride height. ARC Relocation Bracket included for full Adaptive Ride Control compatibility. The 2019–2022 Chevy Silverado clears a 295/65R20 on a 20x9 0-offset wheel — a genuine 35" equivalent tire with no trimming required on most tread designs.
Verified Fitment (OFAS Standard)
✅ Fits: 2019–2024 Chevrolet Silverado 1500 (with or without ARC)
✅ Fits: 2019–2024 GMC Sierra 1500 (with or without ARC)
❌ Does NOT fit: Trail Boss, ZR2, AT4, or AT4X
❌ Does NOT fit: 2019 Classic body style (LD or Limited — old body)
❌ Does NOT fit: Super Cruise equipped vehicles
❌ Does NOT fit: Single Cab — fitment and drivability not validated by ReadyLIFT
❌ Does NOT fit: Vehicles with mono-leaf rear springs without upgrade — mono-leaf applications require U-bolt kit 67-39530UB (mono-leaf identifiable by round/circular U-bolt at top of leaf spring)
❌ Note: Late model 2024 and 2025 applications with round U-bolts require U-bolt part number 67-35120UB for compatibility
❌ Note: Use of 4Auto feature is not recommended with this kit
❌ Note: NOT intended for off-road use or abuse
| Spec | Detail |
|---|---|
| Lift Height | 4.0" Front / 3.0" Rear |
| Front Components | 2x fabricated steel heavy-duty strut extensions (offset design), 2x CNC billet aluminum spring pre-load spacers, 4x laser cut washers, 2x DOM steel UCAs with HD ball joints & TCT bushings (ARC adaptor included) |
| Rear Components | 3" OE-style cast iron lift blocks with axle pad locating ears, new longer U-bolts |
| ARC Compatibility | Yes — ARC Relocation Bracket included |
| Design | No-cut, bolt-on installation |
| SKU | 69-39400 |
| Replaces | 69-3940 |
| Manufacturer | ReadyLIFT |
Wheel & Tire Fitment
Max tire size varies by model year and body style:
| Application | Max Tire | Wheel | Notes |
|---|---|---|---|
| 2019–2022 Chevy Silverado 1500 | 295/65R20 | 20x9 0 offset | Some trimming may be required depending on tread design |
| 2019–2024 GMC Sierra 1500 | 295/55R20 | 20x9 0 offset | Fender flare wheel well restrictions apply |
| 2023–2024 Chevy Silverado 1500 | 295/55R20 | 20x9 0 offset | Fender flare wheel well restrictions apply |
ReadyLIFT wheel and tire fitment recommendations are based on Wheel Pros wheels and Nitto tires. Actual dimensions vary meaningfully by manufacturer — overall diameter, tread width, aspect ratio, and sidewall construction will differ. Every tire and wheel combination must be test fit prior to final installation. Upgrading to heavier 10-ply (Load Range E) all-terrain or mud-terrain tires will noticeably increase suspension stiffness and alter ride harshness compared to factory 6-ply (Load Range C) tires. Consult your local installer for application-specific guidance.
Installation & Engineering Notes
This is a complete no-cut, bolt-on system. A professional 4-wheel alignment is mandatory post-installation to verify torque specs, confirm ride height, and lock in corrected UCA geometry. Verify rear leaf spring type before ordering — mono-leaf applications require the 67-39530UB U-bolt upgrade. Late model 2024 and 2025 trucks with round U-bolts require 67-35120UB. Lifting your vehicle raises its center of gravity; exercise appropriate caution on- and off-road. All Advanced Driver Assistance Systems (ADAS) including GM Safety Alert Seat, Lane Keep Assist, Forward Collision Alert, and Super Cruise (where equipped) must be checked and recalibrated after installation — note this kit is not compatible with Super Cruise vehicles.
Engineering Question: Does your 2019–2024 Silverado or Sierra have mono-leaf rear springs or standard multi-leaf springs? And does your truck have round U-bolts at the top of the leaf spring? Confirm your rear spring configuration and U-bolt style before ordering — mono-leaf and late-model round U-bolt applications require specific U-bolt upgrades not included in the base kit.