Fabtech K1212 3-Inch Ball Joint UCA Lift Kit with Rear Performance Shocks — 2025 Silverado/Sierra 1500

Fabtech K1212 retains the factory front coilovers with spring and top spacers, adds replacement upper control arms and rear blocks, and replaces the two rear shocks with Performance shocks.

Application

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

Package contents

• One FTS21306 box: driver FT20833 and passenger FT20834 upper control arms, two FT20619 ball joints, two FT20801 upper coilover spacers, two FT20835 standard spring-perch spacers, two FTBK15 1.5-inch rear blocks, four FT768U U-bolts and specified bushings, sleeves, arm spacers and installation hardware.
• Two FTS7333 rear Performance shocks. Two new rear dampers total; factory front coilovers are retained.

Installation and requirements

• Professional installation required. Read the current FT21248i instructions and check the complete parts list and factory alignment before work. Use the standard suspension branch; this kit is not for factory ARC.
• Retain the factory front coilovers. Remove and safely disassemble them with a spring compressor to fit the standard FT20835 spring-perch spacers. Mark the assembly orientation and reassemble as directed.
• Trim the factory top-cap studs to 1-1/8 inch as directed and fit the FT20801 upper spacers. Cut off the factory frame bumpstop tabs and sand smooth. Install the arms with the specified greased bushings, sleeves and arm spacers.
• Fit the rear blocks, correct round U-bolts and the selected pair of rear shocks. Check brake-hose, ABS-wire, wheel and tire clearances through steering travel.
• Align to factory specifications, adjust headlights, and recheck 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: K1212. Manufacturer product details.

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