{"product_id":"autoacc-torsion-bar-key-adjustment-block-nuts-bolts-for-chevy-gmc-full-thread-m12-set-of-2-forged-grade-12-9","title":"Autoacc Torsion Bar Key Adjustment Block Nuts \u0026 Bolts for Chevy\/GMC — Full-Thread M12 Set of 2, Forged Grade 12.9","description":"\u003cstrong\u003eAutoacc torsion bar key adjustment block nuts and full-thread bolts — a forged, high-strength replace­ment kit (set of 2) engineered to restore and expand torsion-bar ride-height adjustment on compatible Chevy\/GMC trucks and SUVs.\u003c\/strong\u003e\n\n\u003cp\u003eThis pair of torsion bar key adjusters from Autoacc includes 2 block nuts and 2 matching full-thread adjustment bolts designed as direct-fit replacements for a wide range of Chevy, GMC and related platform vehicles. Forged construction with a black anti-rust finish and grade 12.9 bolts give you a stronger-than-OEM option that offers more adjustability and long-term corrosion resistance. The parts are sized M12 with a 22mm hex head and 2.85\" length, built to work where factory keys and bolts wear or strip over time.\u003c\/p\u003e\n\n\u003ch3\u003eWill these adjusters fit my truck or SUV?\u003c\/h3\u003e\n\u003cp\u003eThey cover many GM platforms across model years — from compact S10\/S15 pickups up through full-size Silverado, Sierra, Suburban and heavy-duty models. Check your vehicle’s part number and model year range to confirm fitment before ordering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect replacements for many Silverado\/Sierra 1500\/2500\/3500 models (1999–2010 series)\u003c\/li\u003e\n  \u003cli\u003eAlso fits Tahoe, Suburban, Avalanche, Express, Savana, Yukon, Escalade and H-series where specified\u003c\/li\u003e\n  \u003cli\u003eCompatible with earlier S10\/S15, K1500\/2500\/3500, Sonoma, Jimmy, Bravada and H2 models listed by year\u003c\/li\u003e\n  \u003cli\u003eReplace OE part no. 11561233 where applicable\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow are these adjusters stronger or different than the OEM parts?\u003c\/h3\u003e\n\u003cp\u003eAutoacc uses forged steel and grade 12.9 bolts — a higher tensile rating than typical factory fasteners — plus a full-thread design to give a broader adjustment range and greater resistance to stripping. The black anti-rust coating helps protect threads and hex faces from corrosion in wet or salted-road conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eForged nuts for improved impact and fatigue resistance\u003c\/li\u003e\n  \u003cli\u003eGrade 12.9 bolts: higher tensile strength than common OEM bolts\u003c\/li\u003e\n  \u003cli\u003eFull-thread bolts allow finer ride-height tuning and increased adjustment range\u003c\/li\u003e\n  \u003cli\u003eBlack anti-rust finish helps reduce corrosion and seizing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the exact dimensions and hardware details?\u003c\/h3\u003e\n\u003cp\u003eEach kit contains one pair of torsion adjuster nuts and two full-thread adjustment bolts sized to common OE specs for affected GM torsion-bar setups. The design is intended for direct swapping into the stock mounting location without modification.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBolt diameter: M12 with full threading\u003c\/li\u003e\n  \u003cli\u003eBolt length: 2.85 inches with 22 mm hex head\u003c\/li\u003e\n  \u003cli\u003eIncluded: 2 torsion bar block nuts and 2 corresponding adjusting bolts (set of 2)\u003c\/li\u003e\n  \u003cli\u003eFinish: black anti-rust coating on nuts and bolts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I install and maintain these adjusters?\u003c\/h3\u003e\n\u003cp\u003eInstallation follows standard torsion bar key replacement procedure — raise and support the vehicle, unload torsion bars, remove old keys and bolts, and install the new set to the desired preload. Periodic inspection and lubrication of threads will extend service life and prevent seizing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRequires proper jacking and torsion-bar unloading for safe removal\/installation\u003c\/li\u003e\n  \u003cli\u003eTorque to manufacturer guidance where applicable; use anti-seize for long-term service\u003c\/li\u003e\n  \u003cli\u003eInspect threads and finish after seasonal exposure; recoat or replace if corrosion appears\u003c\/li\u003e\n  \u003cli\u003eSold as a set of 2 — replace both sides if wear or damage is uneven\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This Autoacc kit is aimed at owners, mechanics and fleet managers who need a durable replacement for worn or stripped torsion-bar keys and bolts on Chevy\/GMC trucks and SUVs. It's useful for restoring ride-height adjustability, upgrading to a higher-strength fastener, or servicing older vehicles where OEM fasteners are corroded or damaged. Confirm year and model fitment before purchase to ensure compatibility.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these torsion adjusters direct replacements for factory parts?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes—they match common OE dimensions and replace many factory torsion-bar keys and bolts; verify part no. 11561233 compatibility.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What material and strength are the bolts?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Bolts are forged with grade 12.9 tensile strength and a black anti-rust finish for superior durability.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Autoacc","offers":[{"title":"Default Title","offer_id":67588332880057,"sku":"B09T3279N9","price":83.81,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/autoacc-front-view-packaging.jpg?v=1790518009","url":"https:\/\/redleafauto.ca\/products\/autoacc-torsion-bar-key-adjustment-block-nuts-bolts-for-chevy-gmc-full-thread-m12-set-of-2-forged-grade-12-9","provider":"Redleaf Auto","version":"1.0","type":"link"}