{"product_id":"oto-kautoparts-brake-master-cylinder-for-chevy-silverado-gmc-sierra-2005-2007-aluminum","title":"OTO-KAUTOPARTS Brake Master Cylinder for Chevy Silverado \u0026 GMC Sierra 2005-2007, Aluminum","description":"\u003cp\u003e\u003cstrong\u003eOTO-KAUTOPARTS Brake Master Cylinder is a direct-fit replacement that restores hydraulic braking control for compatible 2005–2007 Chevy Silverado 1500 and GMC Sierra 1500 models.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis aluminum master cylinder assembly is manufactured to match OEM mounting points, outlet threads, and reservoir\/sensor integration so you can replace a worn or leaking unit without modifying your pickup. It fits Silverado and Sierra crew cab and Classic models with the specified engines and vacuum brake systems, and it includes the reservoir and sensor for a near-complete swap-out. Before ordering, confirm the part number and vehicle RPO codes to ensure compatibility.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I know this master cylinder fits my Silverado or Sierra?\u003c\/h3\u003e\n\u003cp\u003eCheck the vehicle fitment details and cross-reference part numbers before purchasing. This unit is listed for 2005–2006 Chevrolet Silverado 1500 and 2007 Silverado 1500 Classic (and equivalent GMC Sierra models) with specific RPO codes and vacuum brake systems.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible years: 2005–2006, plus 2007 Classic models\u003c\/li\u003e\n  \u003cli\u003eEngines covered: 4.3L, 4.8L, 5.3L, 6.0L (V6 and V8 variants)\u003c\/li\u003e\n  \u003cli\u003eCheck vehicle RPO codes: JF3 or JF7 for some crew cab applications\u003c\/li\u003e\n  \u003cli\u003eCross-reference part numbers: M630325, 15183822, MC390930, MCA630325, MC142290, NMC22414\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the key specifications and materials of this brake master cylinder?\u003c\/h3\u003e\n\u003cp\u003eThe OTO-KAUTOPARTS master cylinder is cast from aluminum and engineered for standard hydraulic dimensions used on the listed trucks. It provides two outlet ports and accepts standard 1\/2-20 fittings, matching many factory brake line connections.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMaterial: durable aluminum construction\u003c\/li\u003e\n  \u003cli\u003eBore diameter: 1.125 inches\u003c\/li\u003e\n  \u003cli\u003eOutlet thread sizes: rearward and secondary both 1\/2-20\u003c\/li\u003e\n  \u003cli\u003eOutlets: 2 (front and rear circuit ports)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat comes in the box and how simple is installation?\u003c\/h3\u003e\n\u003cp\u003eThe package includes the master cylinder, the fluid reservoir, and the sensor, plus basic packaging for protection. The part is built for bolt-on replacement—no welding or drilling required—so DIY mechanics with basic tools can complete the swap in a single session, though bleeding the brake system is required afterward.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncluded: master cylinder, reservoir, sensor\u003c\/li\u003e\n  \u003cli\u003eMounting: direct-fit bolt pattern — no drilling\/welding\u003c\/li\u003e\n  \u003cli\u003eInstallation: requires brake line fittings, common hand tools, and brake bleeding\u003c\/li\u003e\n  \u003cli\u003eCondition: new unit, inspect on arrival for correct specs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat warranty and support does OTO-KAUTOPARTS provide?\u003c\/h3\u003e\n\u003cp\u003eOTO-KAUTOPARTS backs this master cylinder with a one-year warranty and offers customer support to address fitment questions or product concerns. If the part does not match the listed specifications on receipt, contact the seller for assistance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWarranty: one-year coverage from OTO-KAUTOPARTS\u003c\/li\u003e\n  \u003cli\u003eSupport: 24-hour online consultation and customer service\u003c\/li\u003e\n  \u003cli\u003eReturn\/help: contact seller for incorrect fitment or defects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This master cylinder is intended for owners or technicians working on 2005–2007 Chevy Silverado 1500 or GMC Sierra 1500 trucks who need a reliable, direct-fit replacement for a failing or leaking brake master cylinder. It's well suited for DIY mechanics comfortable with brake-line work and bleeding, as well as professional shops looking for an aftermarket option that matches OEM mounting and thread specifications. Always verify your vehicle's part numbers and RPO codes before ordering to ensure proper fitment.\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: Does this master cylinder include the reservoir and sensor?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the unit ships with the reservoir and sensor included for a near-complete replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Which part numbers and models does it replace?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It replaces M630325, 15183822 and equivalents for 2005–2007 Silverado\/Sierra 1500 models listed.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"OTO-KAUTOPARTS","offers":[{"title":"Default Title","offer_id":48084279656606,"sku":"B0FDGGBLGZ","price":96.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/oto-kautoparts-front-view-master-cylinder.jpg?v=1785849292","url":"https:\/\/northtrailauto.ca\/products\/oto-kautoparts-brake-master-cylinder-for-chevy-silverado-gmc-sierra-2005-2007-aluminum","provider":"North Trail Auto","version":"1.0","type":"link"}