Fabtech K1210DL 3-Inch Ball Joint UCA Lift Kit with Reservoir Coilovers — 2025 Silverado/Sierra 1500 V8 Gas

Fabtech K1210DL combines replacement upper control arms, two front Dirt Logic 2.5 reservoir coilovers, rear blocks and two rear Dirt Logic 2.25 non-reservoir shocks.

Application

• 2025 Chevrolet Silverado 1500 Custom, LT, WT, LTZ, High Country or RST, and GMC Sierra 1500 SLE, SLT or Elevation; V8 gasoline, automatic transmission, 2WD or 4WD, with stock suspension. Verify the exact vehicle and installed equipment before ordering.
• Does not fit standard cab, Adaptive Ride Control, Super Cruise, GMC AT4, Chevrolet Trail Boss, four-cylinder or diesel models. This listing excludes Denali and 2026 models.
• Nominal 3-inch system with 1.5-inch rear blocks. The supplied round U-bolts must match the actual vehicle application; verify the rear axle, U-bolt and leaf-spring configuration before ordering. Factory wheels and tires cannot be used.

Package contents

• One FTS21309 box: one FT20833 driver and one FT20834 passenger upper control arm, two FT20619 ball joints, two FTBK15 1.5-inch rear blocks, four FT768U U-bolts and the specified FT20887 hardware subassembly. No front strut spacers.
• One FTS21257 gasoline front reservoir-coilover pair: one FT820632D driver and one FT820632P passenger assembly, two FT30794 reservoir mounts and FT86054 hardware.
• Two FTS811452 rear Dirt Logic 2.25 non-reservoir shocks. Four new dampers total: two front coilovers and two rear shocks.

Installation and requirements

• Professional installation required. Read current FT21268i and the exact FTS21257/FT820632 coilover instructions, check all parts and record factory alignment before work.
• The front coilover upper mounting hole requires sanding approximately 1/2 inch away from the CV axle as shown in FT820632; mount the coilover offset away from the axle. Reservoir mounts require two 1/4-inch drilled holes per side and supplied self-tapping bolts and clamps. Do not remove the pressurized coilover springs or loosen reservoir hoses.
• Remove the factory frame bumpstop tabs and sand smooth. Assemble the upper arms with the specified greased bushings, sleeves and control-arm spacers; relocate the brake/ABS brackets as directed.
• Install the selected rear block/U-bolt hardware and FTS811452 Dirt Logic rear shocks using their supplied instructions. Use the selected Dirt Logic shock hardware and specifications.
• Check wheel, tire, brake-hose and ABS-wire clearances through full steering travel. Align to factory specifications, adjust headlights and recheck all fasteners and wheel hardware after 50 miles and periodically.

Tire and wheel guidance

• Manufacturer guidance, all with minor trimming and 5-inch wheel backspacing: 33/12.50R18 or 295/65R18 on 18×9 wheels; 295/55R20 or 33/12.50R20 on 20×9 wheels; 285/55R22 on 22×9 wheels. Verify clearance on the actual vehicle. Wheels and tires are sold separately.

Manufacturer part number: K1210DL. Manufacturer product details.

California Proposition 65: WARNING: Cancer and Reproductive Harm. www.P65Warnings.ca.gov.