{"product_id":"readylift-4-inch-sst-lift-kit-69-39400-silverado-sierra-1500-2019-2024","title":"ReadyLIFT 4.0\" SST Lift Kit | 4.0\" Front \/ 3.0\" Rear | Fab Steel Offset Strut Extensions | Billet Preload Spacers | DOM Steel UCAs w\/ TCT Bushings | ARC Compatible (Bracket Included) | 2019–2024 Chevy Silverado \u0026 GMC Sierra 1500 | SKU: 69-39400","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eVerified Fitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv dir=\"ltr\" class=\"overflow-x-auto w-full px-2 mb-6 print:overflow-x-visible\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eYear Range\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eMake\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eModel\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eNote\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2019–2024\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChevrolet\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSilverado 1500\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNew body (T1); with or without ARC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2019–2024\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eGMC\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSierra 1500\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNew body (T1); with or without ARC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eDoes NOT fit:\u003c\/p\u003e\n\u003cul dir=\"ltr\" class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eTrail Boss, ZR2, AT4, or AT4X — factory off-road suspension trims.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2019 Classic body style (LD or Limited — old body).\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSuper Cruise equipped vehicles.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSingle Cab — fitment and drivability not validated by ReadyLIFT.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eMono-leaf rear spring trucks as-is — require U-bolt kit 67-39530UB (mono-leaf is identifiable by a round\/circular U-bolt around the top of the leaf spring).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eAdditional requirements and cautions:\u003c\/p\u003e\n\u003cul dir=\"ltr\" class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eLate-model 2024 and 2025 trucks with round U-bolts require U-bolt kit 67-351420UB for this kit to fit.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eUse of the Auto 4 Hi (4Auto) feature is not recommended with this kit.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eNot intended for off-road use or abuse.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eRear spring and U-bolt type are the deciding factors: Before ordering, check your rear leaf spring. Standard multi-leaf is the base fit; mono-leaf requires 67-39530UB, and round-U-bolt 2024\/2025 trucks require 67-351420UB. Text (469) 407-7538 with your VIN or a photo of your rear U-bolt and we'll confirm.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eComponent Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv dir=\"ltr\" class=\"overflow-x-auto w-full px-2 mb-6 print:overflow-x-visible\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eSpecification\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePart Number\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e69-39400\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eReplaces\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e69-3940\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eBrand\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eReadyLIFT Suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProduct Line\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSST Lift Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLift Height\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.0\" front \/ 3.0\" rear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFront Strut Extensions\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e(2) fabricated steel heavy-duty top-mount extensions, offset design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFront Preload Spacers\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e(2) CNC-machined billet aluminum spring preload spacers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFront Washers\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e(4) laser-cut washers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eUpper Control Arms\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e(2) DOM steel tubular UCAs with HD ball joints and TCT maintenance-free pivot bushings — ARC adaptor included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eRear Lift\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3\" OE-style cast iron lift blocks with built-in axle pad locating ears + new longer U-bolts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eARC\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eARC Relocation Bracket included — compatible with or without Adaptive Ride Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eInstallation\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNo-cut, bolt-on — no cutting or structural modification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eEstimated Install Time\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~4.5 hours (±0.5 hr), excluding alignment and wheel\/tire assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMade in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eShipping Method\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFreight\/LTL or UPS Ground per carrier — free shipping to Lower 48\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eOffset strut extension — engineering distinction: The front lift comes from a heavy-duty laser-cut fabricated steel top-mount strut extension with an offset design that corrects the strut and wiper seal angles, working with a CNC billet aluminum preload spacer. This delivers a true 4\" of front lift with improved driveline orientation over the previous 69-3940 — while staying within OEM CV tolerances rather than exceeding CV limits.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eDOM steel UCAs — engineering distinction: Four inches of front lift moves the upper ball joint outside the factory arm's pivot range. The included DOM steel tubular UCAs with optimized ball joint pivot angles and maintenance-free TCT bushings restore proper suspension geometry at the new ride height — they're an essential part of the kit, not an optional add-on.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eARC compatibility built in: This kit is engineered to work with or without factory Adaptive Ride Control. The UCAs include an ARC adaptor and the kit includes an ARC Relocation Bracket, so ARC-equipped trucks retain their adaptive damping function.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eRear rake by design: The 3\" cast iron rear blocks (vs. 4\" front) leave a subtle factory-style rake that holds its stance under towing or payload and looks purpose-built with the GM body lines.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eWhat Is and Is NOT Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv dir=\"ltr\" class=\"overflow-x-auto w-full px-2 mb-6 print:overflow-x-visible\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eIncluded\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eNOT Included\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e(2) DOM steel UCAs with TCT bushings, HD ball joints, and ARC adaptor\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eAlignment — mandatory post-installation; budget separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e(2) fabricated steel HD strut extensions (offset)\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMono-leaf U-bolt kit 67-39530UB (required for mono-leaf trucks)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e(2) CNC billet aluminum spring preload spacers\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eRound-U-bolt kit 67-351420UB (required for 2024\/2025 round-U-bolt trucks)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e(4) laser-cut washers\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eWheels and tires — sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3\" cast iron rear lift block with new longer U-bolts\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eADAS recalibration — required; performed at install\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eARC Relocation Bracket\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eCritical Compatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eNew-body T1 1500 only. Fits 2019–2024 Silverado and Sierra 1500 new body. The 2019 Classic (LD\/Limited old body) is excluded.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eNot for off-road trims. Trail Boss, ZR2, AT4, and AT4X run different factory suspension and are not compatible.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eSuper Cruise excluded. Super Cruise-equipped trucks are not compatible with this kit.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eSingle Cab not validated. ReadyLIFT has not validated fitment and drivability on Single Cab — treat as unconfirmed.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eRear spring \/ U-bolt gates. Standard multi-leaf is the base fit. Mono-leaf trucks require 67-39530UB. Late-model 2024\/2025 round-U-bolt trucks require 67-351420UB. These are separate purchases.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e4Auto not recommended. ReadyLIFT does not recommend using the Auto 4 Hi feature with this kit.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eADAS recalibration required. GM Safety Alert Seat, Lane Keep Assist, and Forward Collision Alert must be recalibrated after install (and this kit is not for Super Cruise trucks).\u003c\/p\u003e\n\u003cdiv dir=\"ltr\" class=\"overflow-x-auto w-full px-2 mb-6 print:overflow-x-visible\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eScenario\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eResult\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2019–2024 Silverado\/Sierra 1500, new body, multi-leaf\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eConfirmed fit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eARC-equipped truck\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eConfirmed — ARC adaptor \u0026amp; relocation bracket included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMono-leaf rear springs\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eRequires 67-39530UB U-bolt kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2024\/2025 with round U-bolts\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eRequires 67-351420UB U-bolt kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTrail Boss \/ ZR2 \/ AT4 \/ AT4X\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDoes NOT fit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2019 Classic (LD\/Limited old body)\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDoes NOT fit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSuper Cruise equipped\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDoes NOT fit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSingle Cab\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNot validated by ReadyLIFT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eWheel \u0026amp; Tire Fitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eMax tire size varies by make, model year, and body style. Figures are based on Wheel Pros wheels and Nitto tires; dimensions vary by manufacturer, so every tire-and-wheel combination must be test fit before final installation.\u003c\/p\u003e\n\u003cdiv dir=\"ltr\" class=\"overflow-x-auto w-full px-2 mb-6 print:overflow-x-visible\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eApplication\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eMax Tire\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eWheel\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2019–2022 Chevy Silverado 1500\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e295\/65R20 (35x11.50 max)\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e20x9 0 offset\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSome trimming may be required depending on tread design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2019–2024 GMC Sierra 1500\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e295\/55R20\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e20x9 0 offset\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFender flare wheel well restrictions apply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2023–2024 Chevy Silverado 1500\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e295\/55R20\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e20x9 0 offset\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFender flare wheel well restrictions apply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThis kit provides 4\" of lift while staying within OEM CV tolerances — it does not exceed CV limits, which is part of why the tire ceiling is set where it is.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eRide quality note: Stepping up to heavier all-terrain or mud-terrain tires changes the ride. Most larger aftermarket AT\/MT tires are 10-ply (Load Range E) versus a typical OEM 6-ply (Load Range C). The stiffer sidewall increases the perception of suspension stiffness often described as ride harshness, and ride, handling, traction, noise, fuel economy, and wear differ meaningfully between All-Season, All-Terrain, Mud-Terrain, and Trail-Terrain tires. Tire and wheel choice will have a real impact on how the lifted truck drives — factor it in.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eSkill level: Advanced — a complete no-cut bolt-on system (strut extensions, billet preload spacers, UCAs, rear cast blocks, ARC bracket). No cutting or welding, but the scope and alignment-critical UCA work make professional installation the recommended route. Estimated install time ~4.5 hours (±0.5 hr), excluding alignment and wheel\/tire assembly.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eTools required: Standard hand and socket tools, torque wrench, spring compressor as needed for the strut assembly, ball joint separator. Alignment shop access required after installation.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eConfirm rear spring and U-bolt type first. Verify multi-leaf vs. mono-leaf and check for round U-bolts before install — mono-leaf needs 67-39530UB and round-U-bolt 2024\/2025 trucks need 67-351420UB.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003ePost-installation alignment is mandatory. A professional 4-wheel alignment is required to verify torque specs, confirm ride height, and lock in the corrected UCA geometry.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eADAS and headlamp recalibration. GM Safety Alert Seat, Lane Keep Assist, Forward Collision Alert, and headlamp aim must be checked and recalibrated after installation. This kit is not compatible with Super Cruise vehicles.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eSAE J2492 Safety Warning: By installing this product, you acknowledge that the suspension of this vehicle has been modified. As a result, this vehicle may handle differently than factory-equipped vehicles. As with any vehicle, extreme care must be used to prevent loss of control or rollover during sharp turns or abrupt maneuvers. Always wear seat belts, and drive safely, recognizing that reduced speeds and specialized driving techniques may be required. Failure to drive this vehicle safely may result in serious injury or death. Do not drive this vehicle unless you are familiar with its unique handling characteristics and are confident of your ability to maintain control under all driving conditions. Some modifications (and combinations of modifications) are not recommended and may not be permitted in your state. Consult your owner's manual, the instructions accompanying this product, and state laws before undertaking these modifications. You are responsible for the legality and safety of the vehicle you modify using these components.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eDoes this work with Adaptive Ride Control (ARC)?\u003c\/strong\u003e\u003cbr\u003eYes — the 69-39400 is engineered to work with or without ARC. The UCAs include an ARC adaptor and the kit includes an ARC Relocation Bracket, so ARC-equipped trucks keep their adaptive damping. This is the key upgrade over the older 69-3940 it replaces.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eHow do I know if I have mono-leaf springs or round U-bolts?\u003c\/strong\u003e\u003cbr\u003eLook at the rear leaf spring. A mono-leaf uses a round\/circular U-bolt around the top of the spring — those trucks need the 67-39530UB U-bolt kit. Separately, some late 2024 and 2025 trucks use round U-bolts and need 67-351420UB. If you're unsure, text (469) 407-7538 a photo of your rear U-bolt and we'll confirm before you order.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eWill it fit my Trail Boss or AT4?\u003c\/strong\u003e\u003cbr\u003eNo. Trail Boss, ZR2, AT4, and AT4X have different factory suspension and are excluded, along with the 2019 Classic old-body and Super Cruise trucks.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eWhat size tire can I run?\u003c\/strong\u003e\u003cbr\u003eIt depends on the truck: 2019–2022 Chevy Silverado clears up to a 295\/65R20 (about a 35x11.50) on a 20x9 0-offset, some trimming possible by tread; 2019–2024 GMC Sierra and 2023–2024 Chevy Silverado top out at 295\/55R20 due to fender flare wheel well restrictions. Test fit your exact combo first.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eDo I need an alignment afterward?\u003c\/strong\u003e\u003cbr\u003eYes — mandatory. The UCAs change camber and caster, so a professional 4-wheel alignment plus ADAS recalibration is required after install.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eThe Obsidian Take\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe 69-39400 is ReadyLIFT's complete no-cut 4\" SST system for the 2019–2024 GM 1500 — 4\" of front lift on offset fabricated steel strut extensions and billet preload spacers, 3\" of rear on cast iron blocks, with DOM steel UCAs and full ARC compatibility. It replaces the older 69-3940 and is the version to buy if your truck has Adaptive Ride Control, because the ARC adaptor and relocation bracket are built in.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe offset strut extension is the engineering decision that matters. A basic 4\" strut spacer would push the strut and wiper seal angles out of line and steepen the CV angles; the offset design corrects the strut\/wiper geometry and improves driveline orientation while deliberately staying inside OEM CV tolerances rather than exceeding them. That's why the tire ceiling is set where it is — this is a daily-drivable street lift, not an off-road-abuse kit, and ReadyLIFT says as much.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe UCAs are the other reason it rides right. Four inches of lift takes the upper ball joint past the factory arm's range; the DOM steel arms with corrected pivot angles and maintenance-free TCT bushings bring the geometry back and keep alignment in spec. Included, not optional.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe fitment traps to clear before you buy are the rear spring and U-bolt style. Multi-leaf is the base fit; mono-leaf needs the 67-39530UB kit, and round-U-bolt 2024\/2025 trucks need 67-351420UB. Miss that and the rear won't bolt up correctly.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThis SKU is for: 2019–2024 Silverado and Sierra 1500 owners (new body, with or without ARC) who want a complete, no-cut 4\"\/3\" street lift with corrected UCA geometry and room for a 295-series tire, on standard multi-leaf springs — or mono-leaf\/round-U-bolt trucks that add the correct U-bolt kit.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThis SKU is NOT for: Trail Boss, ZR2, AT4, or AT4X trims, 2019 Classic old-body trucks, Super Cruise vehicles, unvalidated Single Cab configurations, off-road\/abuse use, or anyone planning to skip the post-install alignment and ADAS recalibration.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eClosing Blocks\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eManufacturer Data Disclaimer\u003c\/strong\u003e\u003cbr\u003eProduct specifications, fitment data, and feature details are sourced from ReadyLIFT Suspension manufacturer documentation and verified third-party technical references current at the time of publication. ReadyLIFT reserves the right to modify product specifications without notice. Confirm body style (new body vs. 2019 Classic), trim, ARC status, Super Cruise status, and rear spring\/U-bolt type before ordering. OFAS is not responsible for incompatibility resulting from off-road-trim misapplication, Classic-body or Super Cruise misidentification, mono-leaf or round-U-bolt spring configurations ordered without the required U-bolt kit, or failure to complete post-installation alignment and ADAS recalibration. Obsidian Forged Auto Supply is an authorized ReadyLIFT dealer.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eProp 65 Warning\u003c\/strong\u003e\u003cbr\u003e⚠ WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to \u003ca class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\" href=\"http:\/\/www.p65warnings.ca.gov\"\u003ewww.p65warnings.ca.gov\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eNon-Returnable Notice\u003c\/strong\u003e\u003cbr\u003eThis item is non-returnable once installed. Verify body style, trim, ARC status, Super Cruise status, and rear spring\/U-bolt type before ordering. Questions before ordering? Text (469) 407-7538.\u003c\/p\u003e","brand":"ReadyLIFT Suspension","offers":[{"title":"Default Title","offer_id":51631859499329,"sku":"69-39400","price":949.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/1284\/1793\/files\/69-39400.jpg?v=1776280440","url":"https:\/\/obsidianforgedautosupply.com\/products\/readylift-4-inch-sst-lift-kit-69-39400-silverado-sierra-1500-2019-2024","provider":"Obsidian Forged Auto Supply","version":"1.0","type":"link"}