{"product_id":"2025-2026-gm-1500-trail-boss-at4-4-lift-kit","title":"2025-2026 GM 1500 Trail Boss \/ AT4 4\" Big Lift Kit (44-35425)","description":"\u003cp\u003eThe ReadyLIFT 4-inch Big Lift Kit is a new offering engineered for the 2025 Chevy Silverado Trail Boss and GMC AT4 1500 trucks, delivering incredible ride quality and superior handling performance. This kit is built with the very best of ReadyLIFT engineering, featuring heavy-duty components such as boxed steel front and rear cross members and a full-width front skid plate constructed of thick 3\/16-inch plate steel. The result of months of development and thousands of miles of road and trail testing, this 4-inch lift kit is proven to make these GM 1500 trucks ride better than stock.\u003c\/p\u003e\n\u003ch6\u003eFeatures\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003eDelivers 4 inches of lift.\u003c\/li\u003e\n\u003cli\u003eMaintains the factory ride and handling characteristics.\u003c\/li\u003e\n\u003cli\u003eFeatures heavy-duty angled and offset top mount strut extensions and rear shock extensions.\u003c\/li\u003e\n\u003cli\u003eIncludes heavy-duty cast iron lift knuckles engineered to retain factory-quality geometry.\u003c\/li\u003e\n\u003cli\u003eUtilizes boxed steel front and rear cross members and a full-width front skid plate made from 3\/16-inch plate steel.\u003c\/li\u003e\n\u003cli\u003eComes with 1\/4-inch boxed plate steel differential drop brackets with a double gusset and boxed center rib.\u003c\/li\u003e\n\u003cli\u003eIncludes fabricated steel rear blocks with integrated bump stop landings.\u003c\/li\u003e\n\u003cli\u003eBacked by the ReadyGuard Powertrain Warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eNotes\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003eUse of the Auto 4 Hi feature is not recommended.\u003c\/li\u003e\n\u003cli\u003eVehicle alignment and headlamp aim must be checked and adjusted after product installation.\u003c\/li\u003e\n\u003cli\u003eIf the vehicle is equipped with Advanced Driver Assistance Systems (ADAS), these systems may require recalibration.\u003c\/li\u003e\n\u003cli\u003eEstimated installation time is 10 hours plus or minus 1 hour, excluding alignment and wheel\/tire assembly.\u003c\/li\u003e\n\u003cli\u003eDo not recommend an 18-inch wheel with 0mm offset or higher due to fitment issues; only a -12mm offset works for an 18-inch wheel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eCompatibility Notes\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003eEngineered for 2025 Chevy Silverado Trail Boss and GMC AT4 1500 trucks.\u003c\/li\u003e\n\u003cli\u003eNot for use on Diesel motor applications.\u003c\/li\u003e\n\u003cli\u003eNot compatible with rear composite mono-leaf springs; only works with vehicles equipped with traditional steel leaf springs.\u003c\/li\u003e\n\u003cli\u003eSingle Cab configuration fitment and drivability has not been validated.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eTire Fitment\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003eRecommended maximum tire with no trimming is 35x12.50 on a 20x9 wheel with 0 offset.\u003c\/li\u003e\n\u003cli\u003eWith trimming, fitment is possible for up to 35x12.50 or 325\/60R20 tires on a 20x10 wheel with -18 offset.\u003c\/li\u003e\n\u003cli\u003eTrimming requirements include the front valance, front felt liner edge, rear felt liner edge, and front-rear well edge mud flap.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eSpecs\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003eLift Height: 4 inches.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCross Member Material: 3\/16-inch plate steel.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDifferential Drop Material: 1\/4-inch boxed plate steel.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eKit Contents: Front\/Rear Cross Members, Front Skid Plate, Lift Knuckles, Strut Extensions, Rear Shock Extensions, Differential Drop Brackets, Sway Bar Drop Brackets, Fabricated Rear Blocks, and installation hardware.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ReadyLift","offers":[{"title":"Default Title","offer_id":42741174042713,"sku":"44-35425","price":3145.94,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/8030\/9593\/files\/44-35425_c661483d-894c-49fb-a384-fdcea6cdd80e.jpg?v=1760715222","url":"https:\/\/dirtygarage.com\/products\/2025-2026-gm-1500-trail-boss-at4-4-lift-kit","provider":"Dirty Garage","version":"1.0","type":"link"}