{"title":"GMT900 | 2007-2013 GM Truck","description":"","products":[{"product_id":"1999-2018-chevy-and-gmc-1500-oem-length-heavy-duty-leaf-spring-shackle","title":"1999-2018 Chevy and GMC 1500 | OEM Length Heavy Duty Leaf Spring Shackle","description":"\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:--spacing(4)] thread-sm:[--thread-content-margin:--spacing(6)] thread-lg:[--thread-content-margin:--spacing(16)] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] thread-lg:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"6c6c4bba-06e5-40c8-a780-3efbfe42a353\" dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+\u0026amp;]:mt-1\" data-message-model-slug=\"gpt-5-1\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full break-words light markdown-new-styling\"\u003e\n\u003chr data-start=\"444\" data-end=\"447\"\u003e\n\u003ch2 data-start=\"449\" data-end=\"539\"\u003e\u003cstrong data-start=\"451\" data-end=\"539\"\u003eFenix Motorsports Heavy Duty OEM-Length Shackles – 1999–2018 Silverado \u0026amp; Sierra 1500\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-start=\"541\" data-end=\"1183\"\u003eIf you own a GMT800, GMT900, or K2-series Silverado or Sierra, you’re driving one of the most proven half-ton platforms ever built. These trucks have earned a reputation for reliability, strength, and adaptability — but even the best platforms have weak points. As these trucks age, and as owners put them through heavier workloads, towing, off-road miles, and daily abuse, the factory shackles become an increasingly common failure point. Thin stamped steel, a single-pass weld, inconsistent bushing support, and two decades of corrosion add up to sloppy handling, noisy suspension movement, and in many cases, outright structural failure.\u003c\/p\u003e\n\u003cp data-start=\"1185\" data-end=\"1563\"\u003eFenix Motorsports designed our \u003cstrong data-start=\"1216\" data-end=\"1250\"\u003eHeavy Duty OEM-Length Shackles\u003c\/strong\u003e as a direct-fit, zero-lift, structurally superior replacement for owners who demand \u003cem data-start=\"1335\" data-end=\"1341\"\u003ereal\u003c\/em\u003e durability, \u003cem data-start=\"1354\" data-end=\"1360\"\u003ereal\u003c\/em\u003e performance, and the confidence that their rear suspension can take whatever they throw at it. These aren’t gimmick parts — they are engineered solutions for trucks that work, tow, and see real terrain.\u003c\/p\u003e\n\u003chr data-start=\"1565\" data-end=\"1568\"\u003e\n\u003ch2 data-start=\"1570\" data-end=\"1603\"\u003e\u003cstrong data-start=\"1573\" data-end=\"1603\"\u003ePrecision Crafted In-House\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-start=\"1605\" data-end=\"1994\"\u003eEvery Fenix Motorsports shackle starts with manufacturing fundamentals done the right way. Each unit is \u003cstrong data-start=\"1709\" data-end=\"1739\"\u003eprecision CNC-cut in-house\u003c\/strong\u003e, formed on a \u003cstrong data-start=\"1753\" data-end=\"1772\"\u003eCNC press brake\u003c\/strong\u003e for accurate geometry, and \u003cstrong data-start=\"1800\" data-end=\"1814\"\u003eTIG welded\u003c\/strong\u003e to ensure maximum structural fusion. TIG welding provides deeper penetration, cleaner heat control, and significantly improved fatigue life over conventional MIG-welded options.\u003c\/p\u003e\n\u003cp data-start=\"1996\" data-end=\"2376\"\u003eThe backbone of each shackle is a \u003cstrong data-start=\"2030\" data-end=\"2067\"\u003e1\/4-inch thick DOM bushing sleeve\u003c\/strong\u003e paired with \u003cstrong data-start=\"2080\" data-end=\"2110\"\u003e3\/16-inch HRPO steel plate\u003c\/strong\u003e — a combination chosen not for cost savings, but for the ideal balance of rigidity, tensile strength, and long-term dimensional stability. This creates a boxed, reinforced structure that resists flex, elongation, and cracking even under repeated high-load cycles.\u003c\/p\u003e\n\u003cp data-start=\"2378\" data-end=\"2848\"\u003eWhere many aftermarket shackles reuse worn factory bushings or supply low-grade rubber replacements, Fenix equips each set with \u003cstrong data-start=\"2506\" data-end=\"2592\"\u003eEnergy Suspension polyurethane bushings and precision-machined steel inner sleeves\u003c\/strong\u003e. These bushings offer dramatically improved resistance to heat, petroleum, and environmental wear. They reduce deflection, tighten rear-end tracking, and eliminate the vague, mushy feel caused by collapsing rubber bushings found on aging factory trucks.\u003c\/p\u003e\n\u003cp data-start=\"2850\" data-end=\"3110\"\u003eWhether your truck sees freeway use, desert miles, forest roads, jobsite hauling, or mixed-use off-road travel, these bushings provide a stable, predictable interface between the frame and the leaf pack, enhancing handling, articulation, and driver confidence.\u003c\/p\u003e\n\u003chr data-start=\"3112\" data-end=\"3115\"\u003e\n\u003ch2 data-start=\"3117\" data-end=\"3163\"\u003e\u003cstrong data-start=\"3120\" data-end=\"3163\"\u003eGuaranteed Precision Engineered Fitment\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-start=\"3165\" data-end=\"3356\"\u003eThese shackles are engineered specifically for the \u003cstrong data-start=\"3216\" data-end=\"3264\"\u003e1999–2018 General Motors 1500 series pickups\u003c\/strong\u003e, covering both Chevrolet Silverado and GMC Sierra 1500 in \u003cstrong data-start=\"3323\" data-end=\"3338\"\u003e2WD and 4WD\u003c\/strong\u003e configurations.\u003c\/p\u003e\n\u003cp data-start=\"3358\" data-end=\"3411\"\u003eThey maintain the factory shackle length — meaning:\u003c\/p\u003e\n\u003cul data-start=\"3412\" data-end=\"3587\"\u003e\n\u003cli data-start=\"3412\" data-end=\"3450\"\u003e\n\u003cp data-start=\"3414\" data-end=\"3450\"\u003e\u003cstrong data-start=\"3414\" data-end=\"3448\"\u003eNo change in suspension height\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3451\" data-end=\"3487\"\u003e\n\u003cp data-start=\"3453\" data-end=\"3487\"\u003e\u003cstrong data-start=\"3453\" data-end=\"3485\"\u003eNo change in driveline angle\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3488\" data-end=\"3525\"\u003e\n\u003cp data-start=\"3490\" data-end=\"3525\"\u003e\u003cstrong data-start=\"3490\" data-end=\"3523\"\u003eNo geometry correction needed\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3526\" data-end=\"3587\"\u003e\n\u003cp data-start=\"3528\" data-end=\"3587\"\u003e\u003cstrong data-start=\"3528\" data-end=\"3585\"\u003eFull compatibility with OEM leaf packs and mini packs\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3589\" data-end=\"3697\"\u003eIf your goal is to restore or upgrade strength without altering ride height, these are the correct shackles.\u003c\/p\u003e\n\u003ch3 data-start=\"3699\" data-end=\"3735\"\u003e\u003cstrong data-start=\"3703\" data-end=\"3733\"\u003eCompatible Models Include:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"3736\" data-end=\"3751\"\u003e\u003cstrong data-start=\"3736\" data-end=\"3749\"\u003e1999–2006\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"3752\" data-end=\"3796\"\u003e\n\u003cli data-start=\"3752\" data-end=\"3776\"\u003e\n\u003cp data-start=\"3754\" data-end=\"3776\"\u003eChevy Silverado 1500\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3777\" data-end=\"3796\"\u003e\n\u003cp data-start=\"3779\" data-end=\"3796\"\u003eGMC Sierra 1500\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3798\" data-end=\"3813\"\u003e\u003cstrong data-start=\"3798\" data-end=\"3811\"\u003e2007–2013\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"3814\" data-end=\"3858\"\u003e\n\u003cli data-start=\"3814\" data-end=\"3838\"\u003e\n\u003cp data-start=\"3816\" data-end=\"3838\"\u003eChevy Silverado 1500\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3839\" data-end=\"3858\"\u003e\n\u003cp data-start=\"3841\" data-end=\"3858\"\u003eGMC Sierra 1500\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3860\" data-end=\"3875\"\u003e\u003cstrong data-start=\"3860\" data-end=\"3873\"\u003e2014–2018\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"3876\" data-end=\"3920\"\u003e\n\u003cli data-start=\"3876\" data-end=\"3900\"\u003e\n\u003cp data-start=\"3878\" data-end=\"3900\"\u003eChevy Silverado 1500\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3901\" data-end=\"3920\"\u003e\n\u003cp data-start=\"3903\" data-end=\"3920\"\u003eGMC Sierra 1500\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3922\" data-end=\"4125\"\u003eWhether your truck is stock, lightly modified, or equipped with helper springs, add-a-leaf packs, tow packages, or mild lift systems that retain OEM shackle geometry, these shackles integrate seamlessly.\u003c\/p\u003e\n\u003chr data-start=\"4127\" data-end=\"4130\"\u003e\n\u003ch2 data-start=\"4132\" data-end=\"4165\"\u003e\u003cstrong data-start=\"4135\" data-end=\"4165\"\u003eBuilt for Trucks That Work\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-start=\"4167\" data-end=\"4424\"\u003eThe GM 1500 platform is extremely capable, but the factory shackle is one of its most documented weaknesses. Stamped steel fatigues. Welds crack. Bushings dry out. The result? Axle wrap, unpredictable squat, clunks under load, and wandering on choppy roads.\u003c\/p\u003e\n\u003cp data-start=\"4426\" data-end=\"4495\"\u003eUpgrading the shackle transforms how the rear of the truck behaves:\u003c\/p\u003e\n\u003cul data-start=\"4496\" data-end=\"4783\"\u003e\n\u003cli data-start=\"4496\" data-end=\"4551\"\u003e\n\u003cp data-start=\"4498\" data-end=\"4551\"\u003e\u003cstrong data-start=\"4498\" data-end=\"4519\"\u003eReduced axle wrap\u003c\/strong\u003e under acceleration and towing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4552\" data-end=\"4592\"\u003e\n\u003cp data-start=\"4554\" data-end=\"4592\"\u003e\u003cstrong data-start=\"4554\" data-end=\"4590\"\u003eMore controlled suspension squat\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4593\" data-end=\"4647\"\u003e\n\u003cp data-start=\"4595\" data-end=\"4647\"\u003e\u003cstrong data-start=\"4595\" data-end=\"4628\"\u003eImproved rear-track stability\u003c\/strong\u003e during cornering\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4648\" data-end=\"4683\"\u003e\n\u003cp data-start=\"4650\" data-end=\"4683\"\u003e\u003cstrong data-start=\"4650\" data-end=\"4681\"\u003eElimination of bushing slop\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4684\" data-end=\"4732\"\u003e\n\u003cp data-start=\"4686\" data-end=\"4732\"\u003e\u003cstrong data-start=\"4686\" data-end=\"4714\"\u003eBetter articulation feel\u003c\/strong\u003e in off-road use\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4733\" data-end=\"4783\"\u003e\n\u003cp data-start=\"4735\" data-end=\"4783\"\u003e\u003cstrong data-start=\"4735\" data-end=\"4781\"\u003eImproved longevity of the leaf pack itself\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"4785\" data-end=\"4907\"\u003eThis is not a cosmetic upgrade — it’s an essential structural improvement for any Silverado or Sierra that does real work.\u003c\/p\u003e\n\u003cp data-start=\"4909\" data-end=\"5208\"\u003eWhether your use-case is high-speed dirt travel, towing equipment, hauling bed weight, long-distance overlanding, or simply restoring a tired rear suspension to better-than-new durability, these shackles are engineered to replace the weakest point with something you never have to think about again.\u003c\/p\u003e\n\u003chr data-start=\"5210\" data-end=\"5213\"\u003e\n\u003ch2 data-start=\"5215\" data-end=\"5264\"\u003e\u003cstrong data-start=\"5218\" data-end=\"5264\"\u003eFinishing Options for Durability and Style\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-start=\"5266\" data-end=\"5357\"\u003eWe offer multiple finish options so you can tailor durability and aesthetics to your needs:\u003c\/p\u003e\n\u003cul data-start=\"5359\" data-end=\"5795\"\u003e\n\u003cli data-start=\"5359\" data-end=\"5479\"\u003e\n\u003cp data-start=\"5361\" data-end=\"5479\"\u003e\u003cstrong data-start=\"5361\" data-end=\"5374\"\u003eRaw Steel\u003c\/strong\u003e – Ideal for fabricators or DIY coaters. Weld, customize, or finish in your preferred color or coating.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"5480\" data-end=\"5596\"\u003e\n\u003cp data-start=\"5482\" data-end=\"5596\"\u003e\u003cstrong data-start=\"5482\" data-end=\"5502\"\u003eBlack Powdercoat\u003c\/strong\u003e – Clean, OEM-plus appearance with excellent corrosion resistance and a professional finish.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"5597\" data-end=\"5795\"\u003e\n\u003cp data-start=\"5599\" data-end=\"5795\"\u003e\u003cstrong data-start=\"5599\" data-end=\"5641\"\u003eIllusion Ruby (Fenix Signature Finish)\u003c\/strong\u003e – A deep, candy-metallic red with a premium, high-depth appearance. Perfect for show builds or anyone who wants their suspension components to stand out.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"5797\" data-end=\"5922\"\u003eEvery coated shackle is media blasted, cleaned, powder-applied, and oven-cured for maximum adhesion and long-term protection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 data-start=\"5929\" data-end=\"5967\"\u003e\u003cstrong data-start=\"5932\" data-end=\"5967\"\u003eWhy Buy from Fenix Motorsports?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-start=\"5969\" data-end=\"6161\"\u003eBecause we don’t build catalog parts — we build \u003cstrong data-start=\"6017\" data-end=\"6045\"\u003epurpose-built components\u003c\/strong\u003e constructed with the same engineering mindset we apply to off-road suspension design and performance fabrication.\u003c\/p\u003e\n\u003cp data-start=\"6163\" data-end=\"6331\"\u003eAt Fenix Motorsports, our philosophy is simple:\u003cbr data-start=\"6210\" data-end=\"6213\"\u003e\u003cstrong data-start=\"6213\" data-end=\"6329\"\u003eEliminate the weak points. Improve the structure. Build parts that survive real use — not just look good online.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"6333\" data-end=\"6343\"\u003eYou get:\u003c\/p\u003e\n\u003cul data-start=\"6344\" data-end=\"6569\"\u003e\n\u003cli data-start=\"6344\" data-end=\"6366\"\u003e\n\u003cp data-start=\"6346\" data-end=\"6366\"\u003ePremium HRPO steel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"6367\" data-end=\"6382\"\u003e\n\u003cp data-start=\"6369\" data-end=\"6382\"\u003eDOM sleeves\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"6383\" data-end=\"6421\"\u003e\n\u003cp data-start=\"6385\" data-end=\"6421\"\u003eControlled TIG-welded construction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"6422\" data-end=\"6458\"\u003e\n\u003cp data-start=\"6424\" data-end=\"6458\"\u003ePolyurethane bushing integration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"6459\" data-end=\"6481\"\u003e\n\u003cp data-start=\"6461\" data-end=\"6481\"\u003eGuaranteed fitment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"6482\" data-end=\"6510\"\u003e\n\u003cp data-start=\"6484\" data-end=\"6510\"\u003eField-tested reliability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"6511\" data-end=\"6569\"\u003e\n\u003cp data-start=\"6513\" data-end=\"6569\"\u003eComponents built to outperform anything in their class\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"6571\" data-end=\"6703\"\u003eThis is how we approach every Fenix Motorsports in-house product — parts built for trucks that are actually used, not just pavement princesses.\u003c\/p\u003e","brand":"Fenix Motorsports","offers":[{"title":"Black","offer_id":47035613774082,"sku":"FM-GMT1500-RS-1000","price":199.99,"currency_code":"USD","in_stock":true},{"title":"Illusion Ruby","offer_id":47035613806850,"sku":"FM-GMT1500-RS-1001","price":199.99,"currency_code":"USD","in_stock":true},{"title":"Raw (No Coating)","offer_id":47035613839618,"sku":"FM-GMT1500-RS-1002","price":169.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0676\/5271\/4754\/files\/1999-2018-chevy-and-gmc-1500-oem-length-heavy-duty-leaf-spring-shackle-3761161.jpg?v=1763188155"}],"url":"https:\/\/fenixmotorsport.com\/collections\/gmt900-2007-2013-gm-truck.oembed","provider":"Fenix Motorsports LLC","version":"1.0","type":"link"}