2011-2019 GM HD 3.5" SST Lift Kit Front 2 Rear Upper Control Arms (69-3422)

The ReadyLIFT 3.5-inch Front / 2-inch Rear SST Lift Kit for 2011-2019 GM Silverado/Sierra 3500 HD trucks is a comprehensive bolt-on suspension system designed for Dual Rear Wheel (DRW) and Single Rear Wheel (SRW) models with factory tow package springs. This kit features heavy-duty tubular steel upper control arms and forged torsion keys indexed specifically for 3.5 inches of front lift. By including critical steering and drivetrain corrections, such as reinforced tie-rod assemblies and differential drop spacers, this kit provides a significant stance improvement while maintaining factory ride quality and durability.

Features

• Provides 3.5 inches of front lift and 2.0 inches of rear lift for an improved, aggressive stance.
• Heavy-duty tubular steel upper control arms engineered to match the strength of the HD chassis.
• Lift-oriented forged torsion keys provide adjustable height while preserving the OEM ride.
• Heavy-duty replacement tie-rod end assemblies resolve the traditional weak link in GM steering systems.
• CNC-machined differential drop spacers maintain safe factory CV axle angles on 4WD models.
• Includes OEM-style 2.0-inch cast iron rear lift blocks with new longer U-bolts.
• True bolt-on design requires no cutting of OEM parts or welding.
• Clears wheel and tire combinations up to 34 inches in diameter.

Notes

• A professional wheel alignment is required after installation to ensure optimal handling and safety.
• Headlamp aim must be checked and adjusted for safety following the change in ride height.
• Advanced Driver Assistance Systems (ADAS) should be recalibrated to maintain proper monitoring and function.
• Installation by a certified mechanic is recommended due to the complexity of the suspension modifications.
• Requires the use of longer front shocks (not included); ReadyLIFT SST3000 Performance Front Shocks are recommended.
• Single Rear Wheel (SRW) trucks with factory overload/tow package springs may require custom U-bolts if the provided ones are insufficient.

Compatibility Notes

• Fits 2011–2019 Chevrolet Silverado and GMC Sierra 3500 HD models.
• Specifically for use on Dual Rear Wheel (DRW) models or Single Rear Wheel (SRW) models equipped with the factory tow package rear leaf springs.
• Differential drop spacers are for 4WD models only and are not used on 2WD applications.

Specs

• Front Lift Height: 3.5 inches (max).
• Rear Lift Height: 2.0 inches.
• Max Tire Size: 34 inches.
• Material: Tubular Steel (UCAs), Forged Steel (Keys), and Cast Iron (Blocks).
• Kit Contents: Tubular upper control arms, forged torsion keys, heavy-duty tie-rod assemblies, differential drop spacers, 2.0-inch rear blocks, and longer U-bolts.