Fabtech
Fabtech K1141DL 4-Inch Lift Kit for 2019-2024 Silverado Trail Boss/Sierra AT4 1500 4WD with Front Dirt Logic Reservoir Coilovers
Check fitment before ordering
Match the year, make, model, trim and engine in the product details. Review mounting requirements and vehicle modifications. Ask us about this part.
Eligible returns within 30 days of receipt. Items must be unused, with tags and original packaging. Contact Lee Mods before sending anything back. Lee Mods pays return shipping for eligible U.S. returns; no restocking fee. See Returns & Exchanges for full conditions.
One complete Fabtech K1141DL 4-inch IFS suspension lift system.
Vehicle application
For 2019-2024 new-body Chevrolet Silverado 1500 Trail Boss and GMC Sierra 1500 AT4 pickups only, 4WD, crew cab with short bed, six- or eight-cylinder gas engines and steel rear leaf springs.
Excludes 2WD, other trims, other cab or bed configurations, adaptive ride control, composite rear leaf springs and vehicles equipped with Super Cruise. Diesel, four-cylinder, ZR2, AT4X, Denali Ultimate, 2019 Silverado LD, 2019 Sierra Limited and unverified LTD/Limited derivative applications are not covered by this listing.
This system adds 4 inches above the factory 2-inch Trail Boss/AT4 lift. The supplied 5-inch rear blocks replace the factory blocks; they are not stacked on the factory blocks.
Package
Includes one FTS21250 Component Box 1 and one FTS21251 Component Box 2. These provide front and rear crossmembers, driver and passenger FTS20840D/FTS20840P steering knuckles, two outer tie-rod ends, sway-bar brackets, rear bump-stop spacers, brake-line brackets, two FTBK5 5-inch rear blocks, four FT1500U-3 rear U-bolts and installation hardware. Differential relocation brackets, a skid plate and two FT20664 axle spacers are also included.
Includes one FTS21260 front Dirt Logic 2.5 coilover package containing two front coilover assemblies and two remote reservoirs. Two FTS811462 rear Dirt Logic 2.25 non-reservoir shocks are included, for four shock assemblies in total. These replace the factory front coilovers and rear shocks. The Basic system front shock extension kit is not included.
Wheels and installation
Aftermarket wheels are required; factory wheels and tires cannot be used. Fabtech lists 35/12.50R18 or 295/70R18 tires on 18x9 wheels, or 35/12.50R20 or 295/65R20 tires on 20x9 wheels, each with 5-inch backspacing and minor trimming. Wheels and tires are not included; confirm clearance on the exact vehicle.
Mounted vehicle photos are illustrative. The vehicle, wheels, tires and other accessories shown are not included and do not establish exact year, trim, engine or drivetrain fitment.
Professional installation and alignment are required. Read the Fabtech FT21250 instructions and the instructions supplied with the exact shock package before ordering and installation.
WARNING: Cancer and Reproductive Harm-www.P65Warnings.ca.gov.
Your vehicle
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Manufacturer & part identification
Fabtech
| Option | SKU / part reference |
|---|---|
| Standard | K1141DL |
Vehicle compatibility
Read the application years, model, trim, engine and exclusions in the description above. A make-level collection or product recommendation alone does not confirm fitment.
Request fitment help →Installation & specifications
Review the manufacturer’s specifications and installation notes above. Confirm required mounting hardware, tools and modifications before ordering. If instructions are not supplied, contact us with the part reference.
Shipping expectations
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Shipping & delivery informationManufacturer warranty
Coverage and exclusions vary by manufacturer and part. Review the supplied product documentation or ask us for the applicable terms.
Warranty information