Fabtech 2019+ Sierra 1500 AT4 & Silverado 1500 Trail Boss 4" Basic Kit # K1136

Fabtech 2019+ Silverado 1500 Trail Boss and Sierra 1500 AT4 Suspension Lift System # K1136 provides 4" inches of additional ride height which can clear up to 35" tires. Fabtech’s suspension design for the Trail Boss and AT4 provides excellent drive ability both on and offroad. There is zero bump steer throughout the suspension cycle that helps reduce drive fatigue while improving the overall drive ability of the vehicle. The near stock track width keeps the tires under the fenders for a clean appearance. Fabtech’s proprietary steering knuckle geometry provides excellent lock to lock turning radius to maneuver in tight spots. Heavy duty 1/4″ thick steel crossmembers feature OE style alignment cam pins that utilize the factory cams for easy adjustment. Triple front diff mounts reposition the differential for vibration free operation at high speed. The factory Trail Boss and AT4 front coilover shocks are retained and relocated from the bottom to allow for full steering range while achieving 4″ of lift. Rear lift is accomplished by removing the factory 2″ blocks and replacing them with taller 5″ blocks and longer U-bolts. The included Fabtech Performance Series rear shocks are matched to the new +3" rear lift height.

Fabtech has addressed all aspects of the Trail Boss suspension for proper wheel travel and lock to lock steering without over cycling. Fabtech is so confident in their design that they include a free 5 year 60,000 mile Powertrain Warranty. (Please contact Fabtech directly for information about this Warranty).

Included Rear Lift:
Fabtech includes a 5" rear lift block that replaces the factory installed 2" block. That means this kit will provide 4" of front lift and 3" of rear lift over the factory Trail Boss / AT4 height.

FOOTNOTES

Cannot use OEM wheel and tire

Fits crew cab, short bed models only

TIRE & WHEEL SIZES

35/12.50R18 tires w/18x9 wheels w/5” BS w/minor trimming 295/70R18 tires w/18x9 wheels w/5” BS w/minor trimming 35/12.50R20 tires w/20x9 wheels w/5” BS w/minor trimming 295/65R20 tires w/20x9 wheels w/5” BS w/minor trimming

For more information about this or any other Fabtech Motorsports product please click on the "Ask A Question" link located at the very top of this page.