ReadyLift 69-3920 SST Lift Kit for 2019-2023 GM Silverado & Sierra AT4 & Trail Boss Models

Last fall we announced our new leveling and SST lift kit offerings for the all-new GM 1500 trucks. We specifically did not include the factory lift kit-equipped GMC  AT4  and Chevy Silverado Trail Boss. The  AT4/Trail Boss are factory equipped with a 2" front lift. This front lift includes a longer front shock/strut assembly. When combining a traditional leveling kit on these factory lifted trucks, several issues present themselves including binding problems with the factory control arm ball joint and contact concerns with the lower strut/CV axle assembly. The 69-3920 SST Lift Kit works with the factory 2" front lift. This kit includes a top mount strut spacer along with a pre-load spacer to limit droop and the same premium grade upper control arms now available in our 66-3921 leveling kit. OE style 3" tall cast iron rear lift blocks and rear bump stop extension cups are also included to create a true  AT4/Trail Boss-specific bolt-on lift kit that provides 2" of front lift and 1" of rear lift. This new lift kit concept is similar to our successful TRD Pro Plus 2 SST Lift Kit which is also engineered specifically to work with that factory OE suspension lift. Your trust in ReadyLIFT to provide high-quality, precision engineered products is extremely important to us. You can be assured that this all-new SST lift kits are the absolutely most reliable and best performing suspension upgrade option for the  AT4/Trail Boss trucks. AT4 - Max tire 305/55-20, 20x9 0 offset wheel Trail Boss - Max tire 295/65-20, 20x9 0 offset wheel NOTE: Use of Auto 4 HI feature not recommended.. 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. NOTE: Not compatible with Sierra AT4X or Silverado ZR2 Edition.

The ReadyLift 69-3920 SST Lift Kit is designed specifically for 2019-2023 GM Silverado 1500 and GMC Sierra 1500 trucks equipped with factory-installed 2-inch front lifts, such as the AT4 and Trail Boss models. This kit provides a balanced lift solution, offering 2 inches of front lift through a top mount strut spacer and preload spacer, along with a 1-inch rear lift using OE-style cast iron blocks and bump stop extension cups. The combination creates a true bolt-on lift that maintains factory ride quality and handling characteristics. The kit includes high-grade upper control arms, which are also featured in the popular 66-3921 leveling kit, ensuring improved suspension performance and durability. This upgrade enhances vehicle appearance and off-road capability while preserving the factory ride quality, making it an ideal choice for owners seeking a reliable lift solution tailored specifically for factory lifted trucks.

Installation requires professional expertise and typically takes over 5 hours due to the complexity of aligning the factory suspension components and ensuring proper fitment. The kit is compatible with trucks equipped with traditional steel leaf springs but is not suitable for vehicles with rear composite mono-leaf springs, identifiable by round U-bolts, or vehicles such as the Sierra AT4X or Silverado ZR2 editions. Max tire sizes supported include 305/55-20 and 295/65-20, which fit well with 20x9 wheels with zero offset. This product does not include shocks, so additional suspension components may be needed for optimal performance.

ReadyLift’s SST lift kit offers a high-quality, precision-engineered suspension upgrade designed to improve ground clearance and aesthetics while ensuring reliability and compatibility with factory suspension geometry. It is a perfect solution for truck owners looking to enhance their vehicle’s off-road stance and capability without compromising ride quality. Note that use of the Auto 4 HI feature is not recommended when the lift kit is installed. This lift kit is an excellent choice for those seeking a bolt-on modification that seamlessly integrates with factory suspension components, providing a substantial upgrade for 2019-2023 GM trucks with factory 2-inch lifts.

Features:

• Provides 2 inches of front lift with a top mount strut spacer and preload spacer

• Includes 1 inch of rear lift using OE-style cast iron blocks and bump stop extension cups

• Designed specifically for factory lifted AT4 and Trail Boss models with 2-inch front lift

• s high-grade upper control arms for improved suspension performance

• Compatible with traditional steel leaf spring trucks, not rear mono-leaf spring models

• Supports maximum tire size of 305/55-20 and 295/65-20 with 20x9 wheels at 0 offset

• Requires professional installation with an estimated time of over 5 hours

• Does not include shocks; additional suspension components may be necessary

• Not recommended for vehicles with rear mono-leaf springs or ZR2/AT4X editions

Fitment:
Chevrolet Silverado 1500 2019
Chevrolet Silverado 1500 2020
Chevrolet Silverado 1500 2021
Chevrolet Silverado 1500 2022
Chevrolet Silverado 1500 2023
Chevrolet Silverado 1500 2024
GMC Sierra 1500 2019
GMC Sierra 1500 2020
GMC Sierra 1500 2021
GMC Sierra 1500 2022
GMC Sierra 1500 2023
GMC Sierra 1500 2024