{"title":"2020-2026 GM 2500HD\/3500HD 6.6L L5P Duramax 3-4\" Rear Shocks","description":"\u003cdiv\u003e\n\u003cinput id=\"post-1\" class=\"read-more-state\" type=\"checkbox\"\u003e\n\u003cp class=\"read-more-wrap\"\u003eFor those with a lifted 2020-2026 GM 2500HD\/3500HD 6.6L Duramax, upgrading to a set of performance 3-4\" rear shocks is one of the best ways to improve your truck’s overall handling and stability. Our selection of aftermarket rear shocks is specifically designed to improve your truck’s performance during heavy-duty towing and off-road adventures, giving you greater control and confidence when you’re behind the wheel. These shocks are designed as direct replacements for your factory units, offering a quick, straightforward upgrade that will instantly enhance your GM 2500HD\/3500HD's ride quality. Consider pairing these rear shocks with some \u003ca href=\"2020-2022-gm-duramax-66l-l5p-3-4-front-shocks\" title='2020-2024 GM 2500HD\/3500HD 6.6L L5P Duramax 3-4\" Front Shocks' rel=\"noopener\" target=\"_blank\"\u003e3-4\" Front Shocks\u003c\/a\u003e to achieve maximum ride comfort on all four corners.\u003cspan class=\"read-more-target\"\u003e \u003cspan class=\"headerspam\"\u003e\u003cstrong\u003eGM Duramax Fitments:\u003c\/strong\u003e 2020, 2021, 2022, 2023, 2024, 2025, 2026 GM 6.6L Duramax.\u003c\/span\u003e \u003cspan class=\"headerspam\"\u003e\u003cstrong\u003eSubmodel Fitments:\u003c\/strong\u003e WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali.\u003c\/span\u003e \u003cspan class=\"headerspam\"\u003eSome exceptions apply, please see individual product pages for specific fitments.\u003c\/span\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003clabel class=\"read-more-trigger\" for=\"post-1\"\u003e\u003c\/label\u003e\n\u003c\/div\u003e","products":[{"product_id":"bilstein-5160-rear-remote-resivour-shocks-01-10-duramax-4-6-lift","title":"Bilstein 25-311846 B8 5160 Remote Reservoir Rear Shock - for 3-4\" Lift - (Single) | 2001-2026 GM 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSupports 3-4\" rear lift\u003c\/li\u003e\n\u003cli\u003eRemote reservoir increases cooling capacity\u003c\/li\u003e\n\u003cli\u003eMonotube design prevents shock fade\u003c\/li\u003e\n\u003cli\u003eVelocity-sensitive digressive valving\u003c\/li\u003e\n\u003cli\u003eSwivel banjo fitting for clean routing\u003c\/li\u003e\n\u003cli\u003eBillet reservoir mount for sleek install\u003c\/li\u003e\n\u003cli\u003eOptimized for off-road performance\u003c\/li\u003e\n\u003cli\u003eImproves wheel travel and ride control\u003c\/li\u003e\n\u003cli\u003eDurable zinc-plated finish resists corrosion\u003c\/li\u003e\n\u003cli\u003e46mm shock body for consistent damping\u003c\/li\u003e\n\u003cli\u003eNon-adjustable for hassle-free operation\u003c\/li\u003e\n\u003cli\u003ePerfect fit for GM 2500HD\/3500HD trucks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePremium Rear Shock Absorber for HD GM Trucks\u003c\/h4\u003e\n\u003cp\u003eIf you've lifted your Duramax and you're serious about performance both on and off the pavement, the Bilstein B8 5160 Rear Shock is the upgrade your truck’s suspension has been waiting for. Built specifically for 2001–2026 GM 2500HD and 3500HD models running 3 to 4 inches of lift, this shock isn't just a replacement, it's a performance leap. At the heart of the B8 5160 is Bilstein’s proven monotube design, offering fade-free damping and superior heat dissipation over traditional twin-tube shocks. But what really sets it apart is the remote reservoir system. That extra fluid capacity isn’t just for show, it plays a critical role in reducing heat buildup under heavy loads or during aggressive off-road driving. The result? More consistent performance, longer shock life, and better control when you need it most.\u003c\/p\u003e\n\u003ch4\u003ePrecision-Engineered Design\u003c\/h4\u003e\n\u003cp\u003eEvery detail is thoughtfully engineered for both function and fit. A 360-degree swivel banjo fitting allows for easy reservoir hose routing, and the included billet clamp keeps your reservoir mounted cleanly and securely. The digressive valving is application-specific, meaning it’s tuned just right for the weight and dynamics of your truck, whether you’re hauling a heavy trailer or navigating rocky terrain. Finished in zinc plating for long-term corrosion resistance and backed by Bilstein’s reputation for reliability, this shock delivers both durability and confidence. If your lifted Duramax is more than just a grocery-getter, this is the kind of gear that makes every mile smoother, every load more stable, and every trail more fun.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 GM Silverado\/Sierra 2500HD\/3500HD with 3-4\" Lift\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollapsed Length (in):\u003c\/strong\u003e 18.14\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Length (in):\u003c\/strong\u003e 31.28\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollapsed Length (mm):\u003c\/strong\u003e 460.8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Length (mm):\u003c\/strong\u003e 794.5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Zinc Plated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReservoir:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Design:\u003c\/strong\u003e Smooth Body (Non-Coilover)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Diameter (id):\u003c\/strong\u003e 46mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring Seat Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBillet Reservoir Clamp Included:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Damping:\u003c\/strong\u003e Non-Adjustable\u003c\/li\u003e\n\u003cli\u003eProduct images may be representative\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/bilstein.blob.core.windows.net\/images\/Media\/E-WM05-0000045.pdf\" target=\"_blank\"\u003e\u003cstrong\u003eInstall Instructions\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Bilstein","offers":[{"title":"Default Title","offer_id":49526920413468,"sku":"BIL25-311846","price":299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/BIL25-311846_1.jpg?v=1745420117"},{"product_id":"bilstein-24-218030-rear-shock-absorber-11-19-gm-6-6l-duramax","title":"Bilstein 24-218030 B8 5100 Rear Shock - for 3-4\" Lift - (Single) | 2011-2026 GM Silverado\/Sierra 2500HD\/3500HD","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSupports 3-4\" rear lift\u003c\/li\u003e\n\u003cli\u003eBuilt for Silverado Sierra HD trucks\u003c\/li\u003e\n\u003cli\u003e46mm monotube shock design\u003c\/li\u003e\n\u003cli\u003eConsistent fade-free performance\u003c\/li\u003e\n\u003cli\u003eVelocity-sensitive digressive valving\u003c\/li\u003e\n\u003cli\u003eTuned for lifted suspension geometry\u003c\/li\u003e\n\u003cli\u003eImproves towing stability and control\u003c\/li\u003e\n\u003cli\u003eEnhances off-road ride quality\u003c\/li\u003e\n\u003cli\u003eZinc-plated corrosion-resistant finish\u003c\/li\u003e\n\u003cli\u003eBlack protective boot included\u003c\/li\u003e\n\u003cli\u003eDirect eye-to-eye mounting\u003c\/li\u003e\n\u003cli\u003eNon-adjustable maintenance-free damping\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eTake Control Of Every Heavy Duty Adventure\u003c\/h4\u003e\n\u003cp\u003eA lifted HD truck should feel confident every time you hit the road, and the Bilstein 24-218030 B8 5100 Rear Shock is built to make that happen. Designed for 2011-2026 Chevrolet Silverado 2500HD, 3500HD, GMC Sierra 2500HD, and 3500HD models with 3 to 4 inches of rear lift, this shock delivers the control and comfort that factory shocks often struggle to maintain. Whether your truck spends its weekends pulling a trailer or tackling rough backroads, you will notice a more planted and predictable ride. Additionally, the Bilstein monotube design keeps damping performance consistent even when the shock is working hard over long distances or uneven terrain. The result is improved stability through corners, reduced suspension bounce, and better confidence behind the wheel. Its durable zinc-plated finish also helps protect against corrosion, making it a dependable upgrade for trucks that see mud, rain, snow, or salted roads. When you want your suspension to perform as well as the rest of your truck, this is an upgrade you will appreciate every mile.\u003c\/p\u003e\n\u003ch4\u003ePrecision Tuned To Support Your Lifted Suspension\u003c\/h4\u003e\n\u003cp\u003eThe Bilstein B8 5100 Rear Shock is engineered specifically for trucks equipped with 3 to 4 inches of rear lift, ensuring the suspension geometry works as intended. A 46mm high-flow monotube piston provides fast, consistent damping while efficiently dissipating heat to reduce performance loss during demanding driving conditions. Furthermore, Bilstein's velocity-sensitive digressive valving automatically responds to changing suspension movement, delivering excellent control over small road imperfections as well as larger impacts. This application-specific tuning helps improve handling, towing stability, and overall ride quality without requiring any manual adjustments. The smooth body, non-coilover construction offers a direct replacement design with eye-to-eye mounting points for compatible applications. A corrosion-resistant zinc-plated finish and included black bellows boot provide added protection from moisture, dirt, and road debris to help extend service life. Backed by Bilstein's limited lifetime warranty, this rear shock combines proven durability with the responsive performance that has made the 5100 Series a trusted choice for lifted heavy duty trucks.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fitment: \u003c\/strong\u003e 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 GM Silverado\/Sierra 2500HD\/3500HD w\/ 3-4\" rear lift\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2011-2026 Chevrolet Silverado and GMC Sierra 2500HD\/3500HD models.\u003c\/li\u003e\n\u003cli\u003eDesigned for trucks with 3 to 4 inches of rear lift.\u003c\/li\u003e\n\u003cli\u003eVerify your rear lift height before ordering.\u003c\/li\u003e\n\u003cli\u003eSold individually. Order two for a complete rear replacement.\u003c\/li\u003e\n\u003cli\u003eDirect fit for compatible HD truck applications.\u003c\/li\u003e\n\u003cli\u003eApplication-specific valving is tuned for lifted suspension geometry.\u003c\/li\u003e\n\u003cli\u003eNon-adjustable damping requires no post-install tuning.\u003c\/li\u003e\n\u003cli\u003eCompatible with factory-style rear eye-to-eye mounting points.\u003c\/li\u003e\n\u003cli\u003eIncludes a protective black bellows boot.\u003c\/li\u003e\n\u003cli\u003eNo reservoir or spring seat is included.\u003c\/li\u003e\n\u003cli\u003eIdeal for lifted trucks used for towing and off-road driving.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended for modified suspension setups.\u003c\/li\u003e\n\u003cli\u003eProduct images may be representative.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/bilstein.blob.core.windows.net\/images\/Media\/Generic_instructions_02.pdf\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003eInstall Instructions\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Bilstein","offers":[{"title":"Default Title","offer_id":49526920937756,"sku":"BIL24-218030","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/24-218030_1_1.jpg?v=1783447807"},{"product_id":"76535-01-23-silverado-icon-aluminum-series-20-rear-shock-absorbers","title":"ICON 76535 V.S. 2.0\" Aluminum Internal Reservoir Rear Shock - for 4-6\" Lift - (Single) | 2001-2026 GM Silverado\/Sierra 2500HD\/3500HD","description":"\u003cp\u003e\u003cstrong\u003eFeatures: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSupports 4-6\" rear lift \u003c\/li\u003e\n\u003cli\u003eFits 2001-2026 GM Silverado\/Sierra 2500HD\/3500HD\u003c\/li\u003e\n\u003cli\u003ePremium Grade 5WT Shock Oil For Consistent Suspension Damping\u003c\/li\u003e\n\u003cli\u003eHas Wide Temperature Range\u003c\/li\u003e\n\u003cli\u003eNitrogen Charged Monotube Design\u003c\/li\u003e\n\u003cli\u003e5\/8\" Chrome Plated Hardened Steel Shaft That Resists Corrosion\u003c\/li\u003e\n\u003cli\u003e6061 Aluminum Durability\u003c\/li\u003e\n\u003cli\u003e100% Rebuildable\u003c\/li\u003e\n\u003cli\u003eLimited Lifetime Warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eGear Up With The Rear Shocks For Your Next Off-Road Adventure\u003c\/h4\u003e\n\u003cp\u003eTaking your rig for an off-road adventure? Make sure to add some extra dampening components like the rear shocks and gain better control over your rig when you want to trek over uneven trails at faster speeds. Trekking off-road can have you bouncing uncontrollably or give excessive wear and tear on your suspension system. Double up and prevent the severe bounce when traveling off-road giving you the leverage against the harsh environment. Take your rear shocks off-road and feel the difference in your maintain and control when trekking over the off-road terrain.\u003c\/p\u003e\n\u003ch4\u003eBattle Corrosion With The Steel Material\u003c\/h4\u003e\n\u003cp\u003eHandle the off-road terrain with ease after installing the aluminum series Icon shock absorbers to your rig. These shock absorbers are built for the rough environments that the off-road terrain can dish out. With the heavy-duty aluminum and steel material on your rear shock absorbers you can dampen all dips and uneven terrain easily to help maintain control. You also get corrosion resistant features from the 5\/8\" steel shaft that helps when trekking for longer periods of time in wet or rainy weather conditions. Traveling in any weather climate can cause excessive wear on your rig's components, although with the rear shock absorbers from Icon help combat corrosion\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment: \u003c\/strong\u003e2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 GM Silverado\/Sierra 2500HD\/3500HD w\/ 4-6\" Rear Lift\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2001-2026 Silverado and Sierra 2500HD\/3500HD\u003c\/li\u003e\n\u003cli\u003eDesigned for 4-6\" rear suspension use only\u003c\/li\u003e\n\u003cli\u003eRequires correct lift height selection for proper fit\u003c\/li\u003e\n\u003cli\u003eSold individually, confirm quantity needed per truck\u003c\/li\u003e\n\u003cli\u003eNitrogen-charged monotube design improves damping response\u003c\/li\u003e\n\u003cli\u003e5\/8\" chrome plated shaft resists wear and corrosion\u003c\/li\u003e\n\u003cli\u003e6061 aluminum body provides strength and heat dissipation\u003c\/li\u003e\n\u003cli\u003eBuilt for off-road performance and highway stability\u003c\/li\u003e\n\u003cli\u003e100% rebuildable for long-term serviceability\u003c\/li\u003e\n\u003cli\u003ePremium 5WT oil maintains performance across temperatures\u003c\/li\u003e\n\u003cli\u003eBacked by limited lifetime manufacturer warranty\u003c\/li\u003e\n\u003cli\u003eProfessional installation recommended for lifted setups\u003c\/li\u003e\n\u003cli\u003e(1) ICON V.S. 2.0\" Aluminum Internal Reservoir Rear Shock\u003c\/li\u003e\n\u003cli\u003eProduct images may be representative\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Icon Vehicle Dynamics","offers":[{"title":"Default Title","offer_id":49527332241692,"sku":"IVD76535","price":195.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/7604179967fbaf1c07828e3cd058c99c_c88b5e2a-a2b6-4b17-b079-3adc9e62fd5c.webp?v=1787674973"},{"product_id":"fox-985-24-241-performance-series-20-smooth-body-ifp-rear-shock-for-15-3in-lift-20-23-gm-25003500","title":"FOX 985-24-241 2.0 Performance IFP Rear Shock - for 1.5-3\" Lift - (Single) | 2020-2026 GM Silverado\/Sierra 2500HD\/3500HD 4WD\/2WD","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSupports 1.5-3\" rear lift\u003c\/li\u003e\n\u003cli\u003eFits 2020-2026 GM Silverado\/Sierra 2500HD\/3500HD 4WD\/2WD\u003c\/li\u003e\n\u003cli\u003e2.0\" Impact extruded 6061-T6 aluminum body\u003c\/li\u003e\n\u003cli\u003eBlack-anodized, CNC-machined 6061-T6 billet aluminum components\u003c\/li\u003e\n\u003cli\u003e5\/8\" hard chrome plated heat-treated alloy steel shaft\u003c\/li\u003e\n\u003cli\u003eRace-developed high-flow piston design\u003c\/li\u003e\n\u003cli\u003eApplication specific valving to maximize performance\u003c\/li\u003e\n\u003cli\u003eJM92 Advanced Suspension Fluid\u003c\/li\u003e\n\u003cli\u003eQuiet nitrile rubber bushings allows\u003c\/li\u003e\n\u003cli\u003eSold individually\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eDurable Rear Shock Absorber for Improved Off-Road Handling\u003c\/h4\u003e\n\u003cp\u003eTake your GM 2500HD\/3500HD to the next level with the FOX Performance Series 2.0 Smooth Body IFP Rear Shock, designed for trucks with a 1.5-3 inch lift. Ideal for off-road enthusiasts and those who frequently navigate rugged terrain, the FOX Performance 2.0 features a race-developed high-flow piston design that delivers exceptional performance in every situation. The advanced piston technology allows the shock to automatically react to changes in terrain, providing better rear-end control, stability, and handling. Additionally, the application-specific valving maximizes performance by tailoring the shock’s behavior to the unique demands of your GM 2500HD\/3500HD, ensuring superior off-road handling and a comfortable ride on the highway. Filled with JM92 Advanced Suspension Fluid, this shock maintains consistent performance across a wide range of temperatures, whether you're driving in extreme heat or cold.\u003c\/p\u003e\n\u003ch4\u003eDurable Construction \u0026amp; Design\u003c\/h4\u003e\n\u003cp\u003eThe FOX Performance Series shock features a 2.0\" impact-extruded 6061-T6 aluminum body, which is tough enough to handle just about anything you throw its way. Its black-anodized, CNC-machined 6061-T6 billet aluminum components further add to its strength, ensuring the shock performs reliably in the toughest conditions. Better yet, the 5\/8\" hard chrome plated, heat-treated alloy steel shaft provides superior durability and smooth operation, even when you're out pushing things to the limit. Sold individually, the FOX 2.0 is a perfect upgrade for truck owners looking to improve their vehicle's overall performance and comfort. Whether you're an off-road enthusiast or someone who wants a smoother ride on daily drives, this shock absorber provides the durability, reliability, and enhanced performance you need.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e 2020, 2021, 2022, 2023, 2024, 2025, 2026 GM Sierra\/Silverado 2500HD\/3500HD w\/ 1.5-3\" Rear Lift\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2020-2026 Silverado and Sierra 2500HD\/3500HD\u003c\/li\u003e\n\u003cli\u003eDesigned for rear suspension use only\u003c\/li\u003e\n\u003cli\u003eBuilt for trucks with 1.5-3 inches of lift\u003c\/li\u003e\n\u003cli\u003eSold individually, order two for rear pair\u003c\/li\u003e\n\u003cli\u003eNot compatible with stock-height rear suspension\u003c\/li\u003e\n\u003cli\u003eRequires correct lift height for proper fitment\u003c\/li\u003e\n\u003cli\u003ePairs best with FOX 2.0 front shocks for balance\u003c\/li\u003e\n\u003cli\u003eUses application-specific valving tuned for GM HD\u003c\/li\u003e\n\u003cli\u003eNo external reservoir, smooth body IFP design\u003c\/li\u003e\n\u003cli\u003eIncludes JM92 fluid for consistent damping in all temps\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on replacement with factory mounting points\u003c\/li\u003e\n\u003cli\u003eLimited lifetime warranty for original purchaser\u003c\/li\u003e\n\u003cli\u003e(1) FOX 2.0 Performance IFP Rear Shock\u003c\/li\u003e\n\u003cli\u003eProduct images may be representative\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/serenity-foxfactory.asset.akeneo.cloud\/fox_asset_family\/media\/605_01_053_REV_C.pdf\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003eInstall Instructions\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Fox Shocks","offers":[{"title":"Default Title","offer_id":49527545954588,"sku":"FOX985-24-241","price":229.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/FOX2_0PerformanceIFPEye_Eye_1600x1600_4c21a74c-a14f-40f2-882c-5b52ac8c59d8_1.webp?v=1785432260"},{"product_id":"fox-987-24-035","title":"FOX 987-24-035 2.5 Performance IFP HTO Rear Shock - for 4-6\" Lift - (Single) | 2011-2026 GM Sierra\/Silverado 2500HD\/3500HD","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSupports 4 to 6 inches of rear lift\u003c\/li\u003e\n\u003cli\u003eFits 2011–2026 GM Sierra\/Silverado 2500HD\/3500HD \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e2.5\" aluminum body for heat management\u003c\/li\u003e\n\u003cli\u003eType II anodized finish resists corrosion\u003c\/li\u003e\n\u003cli\u003eInternal Floating Piston (IFP) for consistent damping\u003c\/li\u003e\n\u003cli\u003eHydraulic Top Out (HTO) smooths rebound control\u003c\/li\u003e\n\u003cli\u003eIdeal for aggressive tires and off-road loads\u003c\/li\u003e\n\u003cli\u003e5\/8\" hard chrome shock shaft for durability\u003c\/li\u003e\n\u003cli\u003eHigh-flow valving improves ride and control\u003c\/li\u003e\n\u003cli\u003eExtended 10.39\" travel for greater articulation\u003c\/li\u003e\n\u003cli\u003eEyelet mounts ensure secure factory-style fitment\u003c\/li\u003e\n\u003cli\u003eVehicle-specific tuning for optimized rear handling\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eUpgrade Your Rear Suspension For The Long Haul\u003c\/h4\u003e\n\u003cp\u003eIf your GM HD truck is sitting on a 4 to 6 inch rear lift, you need a shock that keeps up with every mile, bump, and load, and the FOX 2.5 Performance Series IFP HTO rear shock is built to do just that. Designed to handle the increased travel and added stress of a lifted setup, this bolt-on upgrade brings comfort and control back to your ride. It delivers noticeably smoother handling both on pavement and over rough terrain, making it a great match for daily drivers, weekend warriors, and workhorse rigs alike. The Hydraulic Top Out feature kicks in during full extension, softening the harsh rebound you often feel with taller lifts or heavy-duty tires. That added control goes a long way in maintaining a stable, comfortable ride when your truck is working hard. Whether you're towing, hauling, or heading off the beaten path, this shock keeps your rear end planted and predictable. Plus, it's built with premium materials that hold up under extreme use, so you can trust it to perform wherever the road leads.\u003c\/p\u003e\n\u003ch4\u003eDesigned To Match Heavy Duty Lifted Performance\u003c\/h4\u003e\n\u003cp\u003eThe FOX 987-24-035 rear shock is engineered specifically for 2011–2026 Silverado and Sierra 2500HD and 3500HD trucks with 4 to 6 inches of rear lift. It features a 2.5-inch impact-extruded aluminum body that boosts oil capacity and manages heat efficiently, even under heavy towing or off-road stress. The Type II clear-anodized finish provides corrosion resistance, helping the shock maintain its durability in wet, salty, or dusty conditions. An internal floating piston separates the nitrogen and shock oil to ensure consistent damping across varying terrain and loads. The Hydraulic Top Out piston plays a key role in smoothing rebound near full extension, especially helpful when the suspension is unloaded or under hard articulation. With 10.39 inches of travel, it offers generous movement for off-road scenarios and big rear-end articulation. The 5\/8-inch hard chrome shaft and vehicle-specific tuning give this shock the strength and responsiveness needed for high-performance lifted applications. Mounted using eyelet ends at both top and bottom, it fits securely into stock-style locations for an easy, reliable installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment: \u003c\/strong\u003e 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 GM Sierra\/Silverado 2500HD\/3500HD w\/ 4-6\" Rear Lift\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCompatible with 2011–2026 GM 2500HD\/3500HD trucks\u003c\/li\u003e\n\u003cli\u003eDesigned for 4–6 inch rear suspension lifts\u003c\/li\u003e\n\u003cli\u003eNot compatible with lift kits altering OE mounts\u003c\/li\u003e\n\u003cli\u003eSold individually; purchase two for both rear wheels\u003c\/li\u003e\n\u003cli\u003eIdeal for trucks with larger, heavier tires\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on installation; no modifications needed\u003c\/li\u003e\n\u003cli\u003eHydraulic Top Out (HTO) enhances rebound control\u003c\/li\u003e\n\u003cli\u003eInternal Floating Piston (IFP) maintains damping consistency\u003c\/li\u003e\n\u003cli\u003eAluminum body efficiently dissipates heat\u003c\/li\u003e\n\u003cli\u003eType II anodized finish resists corrosion\u003c\/li\u003e\n\u003cli\u003e5\/8\" hard chrome shaft offers durability\u003c\/li\u003e\n\u003cli\u003eVehicle-specific valving ensures optimal performance\u003c\/li\u003e\n\u003cli\u003eFully rebuildable and re-tunable for longevity\u003c\/li\u003e\n\u003cli\u003e(1) FOX 2.5 Performance IFP HTO Rear Shock\u003c\/li\u003e\n\u003cli\u003eProduct images may be representative\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/serenity-foxfactory.asset.akeneo.cloud\/fox_asset_family\/media\/605_01_053_REV_C.pdf\" target=\"_blank\"\u003e\u003cstrong\u003eInstall Instructions\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Fox Shocks","offers":[{"title":"Default Title","offer_id":52174550728988,"sku":"FOX987-24-035","price":346.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/987_24_009_P04_6ec6c2f1-135d-4e3d-ac03-2890bf1d48b5.webp?v=1751477937"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/collections\/GM_Duramax_3-4_Rear_Shocks_Thumb_2.jpg?v=1728507105","url":"https:\/\/www.alligatorperformance.com\/collections\/2020-2026-gm-duramax-66l-l5p-3-4-rear-shocks.oembed","provider":"Alligator Performance","version":"1.0","type":"link"}