The 2019–24 Chevrolet Silverado 1500 Trail Boss and GMC Sierra 1500 AT4 4WD come with a factory-installed 2″ lift, giving them a taller stance than other GM 1500 models. Fabtech’s engineered 4″ suspension system adds an additional 4″ of lift on top of the factory height, creating the proper clearance needed for 35″ tall tires. Once installed, a Trail Boss or AT4 equipped with this system will sit at the same overall height as a standard GM 1500 running a 6″ suspension and 35″ tires.
Fabtech’s suspension design delivers exceptional on- and off-road driveability. Zero bump steer throughout the suspension cycle reduces driver fatigue while enhancing control and handling. The near-stock track width keeps the tires properly positioned beneath the fenders for a clean, proportional appearance. Fabtech’s proprietary steering knuckle geometry also maintains an excellent lock-to-lock turning radius, improving maneuverability in tight areas.
The system includes heavy duty 1/4″ thick steel crossmembers with OE-style alignment cam pins, triple differential mounts for correct CV and driveshaft angles, and coilover relocation designed to retain stock ride quality while achieving full steering clearance. Rear lift is achieved by replacing the factory 2″ block with a 5″ block and u-bolt setup. Every component is engineered to maintain proper wheel travel and eliminate over-cycling. The system is backed by Fabtech’s free 5-year / 60,000-mile Powertrain Warranty.
