Fabtech 2019+ Sierra 1500 AT4 & Silverado 1500 Trail Boss 4" Dirt Logic Kit # K1140DL

Fabtech 2019+ Silverado 1500 Trail Boss and Sierra 1500 AT4 Suspension Lift System # K1140DL 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 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 Fabtech Dirt Logic 4" Lift # K1140DL replaces the factory Trail Boss and AT4 front coilover shocks with high performance 2.5" body coilovers that provide additional front lift height adjustment and improved performance over the stock shocks. The stainless steel Dirt Logic 2.5 Coilovers replace the Trail Boss or AT4 coilover with an outstanding ride quality both on and offroad. Rear lift is accomplished by removing the factory 2" blocks and replacing them with taller 5" blocks and longer U-bolts. The included Fabtech Dirt Logic 2.25 Series rear shocks are matched to the new +3" rear lift height and provide a more balanced ride.

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:
14. Can not use OEM wheel and tire.
79. Fits crew cab, short bed models only.
182. Fits gas models only.
197. Will not fit models equipped with adaptive ride control.
245. Does not fit 4 cyl. models.

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.