{"product_id":"pdm-bkbn-k1223dl-7d23b6","title":"Fabtech K1223DL 1.5-Inch Dirt Logic UCA Lift Kit — 2025 Silverado Trail Boss \/ Sierra AT4 4WD V8 Gas","description":"\u003cp\u003eFabtech K1223DL specifies front Dirt Logic 2.5 reservoir coilovers, replacement upper control arms, rear block hardware and two rear Dirt Logic 2.25 non-reservoir shocks for factory Trail Boss\/AT4 trucks.\u003c\/p\u003e\u003ch3\u003eApplication\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2025 Chevrolet Silverado 1500 Custom Trail Boss or LT Trail Boss, or GMC Sierra 1500 AT4; V8 gasoline, 4WD, with the specified factory suspension. Verify exact vehicle equipment and rear axle\/leaf-spring configuration before ordering.\u003c\/li\u003e\n\u003cli\u003eNominal 1.5-inch increase for the factory Trail Boss\/AT4 application. Does not fit diesel, four-cylinder, Adaptive Ride Control, Super Cruise or standard-cab configurations. OEM wheels and tires cannot be used.\u003c\/li\u003e\n\u003cli\u003e2026 models and ordinary Silverado\/Sierra trims are outside this listing. The supplied round U-bolts must match the actual application.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePackage contents\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOne FTS21309 component box: driver and passenger upper control arms, TWO ball joints, TWO FTBK15 1.5-inch rear blocks, FOUR FT768U round U-bolts and specified bushings, sleeves, arm spacers and hardware. No front shock spacers are supplied in this box.\u003c\/li\u003e\n\u003cli\u003eOne FTS21257 gasoline FRONT reservoir-coilover PAIR: one driver FT820632D and one passenger FT820632P, TWO reservoir mounts and specified mounting hardware\/clamps. This replaces the factory front coilovers.\u003c\/li\u003e\n\u003cli\u003eTWO FTS811452 REAR Dirt Logic 2.25 NON-reservoir shocks. FOUR new dampers total. The rear shocks differ from the reservoir front assemblies.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eInstallation and requirements\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eProfessional installation required. Read FT21268i, FT820632i and FT811452i and inspect the complete kit and factory alignment before work. Use the Dirt Logic branch and its specific hardware.\u003c\/li\u003e\n\u003cli\u003eThe arm installation requires cutting the factory frame bumpstop tabs and fitting the specified greased bushings, sleeves, ball joints and arm spacers.\u003c\/li\u003e\n\u003cli\u003eThe front-coilover instructions require opening the upper mounting hole 1\/2 inch away from the CV axle with a barrel sander, mounting the coilover offset away from the axle, and drilling TWO 1\/4-inch reservoir-mount holes per side for the supplied self-tapping bolts and clamps. Do not remove the pressurized reservoir hoses or coil preload.\u003c\/li\u003e\n\u003cli\u003eInstall the correct rear blocks and round U-bolts and the selected non-reservoir rear shocks with their specified bushing kits. Do not substitute other shock numbers from generic system examples or infer added rear height from the block dimension alone.\u003c\/li\u003e\n\u003cli\u003eCheck brake-hose, ABS-wire and wheel\/tire clearances, align to factory specifications, adjust headlights and recheck fasteners after 50 miles and periodically.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTire and wheel guidance\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eManufacturer guidance, with minor trimming and 5-inch wheel backspacing: 33\/12.50R20 on 20×9 wheels or 285\/55R22 on 22×9 wheels. Verify actual clearance. Wheels and tires are sold separately.\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eManufacturer part number: K1223DL. \u003ca href=\"https:\/\/fabtechmotorsports.com\/product\/1-5-dirt-logic-system-k1223dl\/\"\u003eManufacturer product details\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eCalifornia Proposition 65: WARNING: Cancer and Reproductive Harm. \u003ca href=\"https:\/\/www.P65Warnings.ca.gov\"\u003ewww.P65Warnings.ca.gov\u003c\/a\u003e.\u003c\/p\u003e","brand":"Fabtech","offers":[{"title":"Default Title","offer_id":54084094525740,"sku":"K1223DL","price":3299.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0977\/8659\/3580\/files\/K1223DL.jpg?v=1793873002","url":"https:\/\/lee-mods.com\/products\/pdm-bkbn-k1223dl-7d23b6","provider":"Lee Mods inc.","version":"1.0","type":"link"}