{"product_id":"readylift-66-3921-suspension-leveling-kit-for-gm-1500-trucks-with-1-75-inch-front-lift","title":"ReadyLift 66-3921 Suspension Leveling Kit for GM 1500 Trucks with 1.75 Inch Front Lift","description":"ReadyLIFT customers have asked for it and we have delivered. In fall of 2018 we announced our new leveling and SST lift kit offerings for the all-new GM 1500 trucks. We specifically did not include the factory lift kit-equipped GMC AT4 and Chevy Silverado Trail Boss. The AT4\/Trail Boss are factory equipped with a 2\" front lift. This front lift includes a longer front shock\/strut assembly. When combining a traditional leveling kit on these factory lifted trucks, several issues present themselves including binding problems with the factory control arm ball joint and contact concerns with the lower strut\/CV axle assembly. The ReadyLIFT 66-3921 1.75\" leveling kit is similar to our popular 66-3086 leveling kit for pre-2019 trucks. The 66-3921 leveling kit provides required amount of lift without causing conflict with the factory strut geometry and clearances. In light of the factory upper control arm's lack of dynamic range when the  AT4\/Trail Boss truck is further lifted, this leveling kit includes our popular tubular upper control arms with corrected ball joint cup angles, heavy-duty replaceable ball joints and out new Terrain Control Technology (TCT) maintenance-free pivot bushings with side-biter washers to improve alignment retention. Note: AT4 and Trail Boss do not fit the same size tire. This is due to the difference in front fender opening design. NOTE:     Not compatible with Sierra AT4X or Silverado ZR2 Edition. 66-3921 Leveling Kit: AT4 - Max tire 275\/60-20, 20x9 0 offset wheel Trail Boss - Max tire 295\/65-20, 20x9 0 offset wheel\n\u003cp\u003eThe ReadyLift 66-3921 suspension leveling kit is designed specifically for 2019-2023 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks, providing a reliable and safe way to achieve a 1.75-inch front lift. This kit is ideal for owners seeking to improve vehicle stance and accommodate larger tires without compromising factory suspension geometry. Crafted to deliver a level ride, it ensures enhanced vehicle appearance and functionality while maintaining ride quality and handling characteristics. \u003cbr\u003e The kit features high-quality spacers made from durable materials that install in the front suspension, providing the desired lift while preserving factory control arm angles. Included are tubular upper control arms with corrected ball joint cup angles, heavy-duty replaceable ball joints, and terrain control technology (TCT) maintenance-free pivot bushings with side-biter washers. These components work together to improve alignment retention and longevity, especially when running larger tires. \u003cbr\u003e Designed to fit specific factory models, the kit is compatible with trucks equipped with factory 2-inch lifts such as the AT4 and Trail Boss, but it does not fit Sierra AT4X or Silverado ZR2 editions. For the AT4, the maximum tire size is 275\/60-20 with 20x9 wheels at 0 offset, while the Trail Boss can accommodate up to 295\/65-20 tires with similar wheel specifications. The installation requires professional expertise and approximately 4 hours to complete, making it a suitable upgrade for serious truck enthusiasts seeking improved aesthetics and off-road capability. \u003cbr\u003e Please note that this product contains chemicals known to cause reproductive harm under California Proposition 65 regulations. Proper installation is critical for safety and optimal performance, and users should ensure compliance with local regulations when installing and using this leveling kit.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003e1.75-inch front lift: Provides a level stance and accommodates larger tires.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHigh-quality spacers: Durable construction for long-lasting performance.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eTubular upper control arms: Correct ball joint cup angles for improved alignment.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHeavy-duty replaceable ball joints: Enhance durability and serviceability.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eTerrain Control Technology (TCT): Maintenance-free pivot bushings with side-biter washers for better alignment retention.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eDesigned for specific GM 1500 models: Fits 2019-2023 Chevrolet Silverado and GMC Sierra trucks.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eCompatibility with factory 2-inch lifts: Suitable for AT4 and Trail Boss models.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eProfessional installation recommended: Approximate installation time of 4 hours.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMax tire sizes: 275\/60-20 for AT4, 295\/65-20 for Trail Boss.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eCalifornia Proposition 65 Warning: Contains chemicals that may cause reproductive harm.\u003c\/li\u003e\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\nChevrolet Silverado 1500  2019\u003cbr\u003e\nChevrolet Silverado 1500  2020\u003cbr\u003e\nChevrolet Silverado 1500  2021\u003cbr\u003e\nChevrolet Silverado 1500  2022\u003cbr\u003e\nChevrolet Silverado 1500  2023\u003cbr\u003e\nChevrolet Silverado 1500  2024\u003cbr\u003e\nChevrolet Silverado 1500  2025\u003cbr\u003e\nGMC Sierra 1500  2019\u003cbr\u003e\nGMC Sierra 1500  2020\u003cbr\u003e\nGMC Sierra 1500  2021\u003cbr\u003e\nGMC Sierra 1500  2022\u003cbr\u003e\nGMC Sierra 1500  2023\u003cbr\u003e\nGMC Sierra 1500  2024\u003cbr\u003e\nGMC Sierra 1500  2025","brand":"ReadyLift","offers":[{"title":"Default Title","offer_id":55991354261796,"sku":"663921","price":397.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/0497\/7444\/files\/RL-1-75-LEVELING-KIT.png?v=1786051145","url":"https:\/\/kovaoffroad.com\/products\/readylift-66-3921-suspension-leveling-kit-for-gm-1500-trucks-with-1-75-inch-front-lift","provider":"Kova Offroad","version":"1.0","type":"link"}