{"product_id":"acdelco-rear-brake-rotor-silver-18a2543a-gm19255508-direct-fit-improved-cooling-quiet-operation","title":"ACDelco Rear Brake Rotor Silver 18A2543A (GM19255508) — Direct-Fit, Improved Cooling \u0026 Quiet Operation","description":"\u003cp\u003e\u003cstrong\u003eACDelco Silver Rear Brake Rotor 18A2543A (GM 19255508) is a single replacement rear disc engineered to restore braking performance with improved cooling, reduced noise, and longer pad life.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis ACDelco Silver rear rotor is a direct-fit replacement manufactured for select Buick, Chevrolet, GMC and Saturn models. Built from a durable multi-alloy cast and featuring an optimized vane pattern, the rotor is designed to dissipate heat efficiently while maintaining a smooth, non-directional finish for quieter operation. Sold individually, this rotor is backed by GM engineering and intended as a high-value service part for routine brake maintenance or partial brake system upgrades.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this rotor manage heat under heavy braking?\u003c\/h3\u003e\n\u003cp\u003eThe rotor uses multi-alloy construction combined with an application-specific vane configuration to channel airflow and pull heat away from the braking surface. Better heat control reduces brake fade during repeated stops and helps maintain consistent pedal feel.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eApplication-specific internal vanes for optimized cooling\u003c\/li\u003e\n  \u003cli\u003eMulti-alloy casting increases thermal conductivity and strength\u003c\/li\u003e\n  \u003cli\u003eRounded radius edges reduce stress under thermal cycling\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this rotor reduce noise and vibration?\u003c\/h3\u003e\n\u003cp\u003eYes — the rotor’s non-directional ground finish and balanced design minimize noise, vibration, and harshness (NVH). That smoother contact surface helps prevent uneven pad wear and diminishes squeal commonly associated with warped or rough rotors.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNon-directional finish for consistent pad contact\u003c\/li\u003e\n  \u003cli\u003eBalanced design to limit vibration at the hub\u003c\/li\u003e\n  \u003cli\u003eSmoother surface reduces uneven pad wear and braking noise\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this rotor affect brake pad longevity?\u003c\/h3\u003e\n\u003cp\u003eA refined braking surface and controlled thickness variation translate to less abrasive action on pads, which can extend pad life. Using this rotor with matching ACDelco pads helps create a cohesive braking set that wears more evenly over time.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSmooth machined surface minimizes thickness variation\u003c\/li\u003e\n  \u003cli\u003eEven pad contact reduces localized glazing or scoring\u003c\/li\u003e\n  \u003cli\u003eRecommended pairing with ACDelco pads for matched performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich vehicles will this rotor fit and how do I confirm fitment?\u003c\/h3\u003e\n\u003cp\u003eThis rear rotor fits a range of GM-platform SUVs and crossovers, including popular models like Chevrolet Traverse, GMC Acadia, Buick Enclave, and Saturn Outlook for specified years. To avoid fitment errors, use the Confirmed Fit tool and verify your vehicle’s VIN in three steps before purchasing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCommon compatible models: Chevrolet Traverse, GMC Acadia, Buick Enclave, Saturn Outlook\u003c\/li\u003e\n  \u003cli\u003eSold as one rear rotor per order — buy two for a full-axle replacement\u003c\/li\u003e\n  \u003cli\u003eUse the VIN check tool to verify exact vehicle application\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This ACDelco Silver rear rotor is intended for vehicle owners, independent mechanics, and fleet technicians seeking a durable, OEM-backed replacement rotor at a value price. It’s ideal for drivers who need a direct-fit service part that restores consistent braking performance without the cost of premium or performance-specific rotors. Choose this rotor when you want GM-compatible durability, improved cooling characteristics, and quieter operation for everyday driving and towing tasks.\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: Is this rotor sold individually or as a pair?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: This listing is for one rear rotor; purchase two for a complete rear-axle replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this rotor with any brake pad brand?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: You can use most pad brands, but pairing with ACDelco pads ensures matched surface finish and optimal wear.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"ACDelco","offers":[{"title":"Default Title","offer_id":48084066500766,"sku":"B005QW93P0","price":81.17,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/acdelco-rear-rotor-front-view_995bc2b8-0c17-459d-9c57-6d00081c4e06.jpg?v=1785845293","url":"https:\/\/northtrailauto.ca\/products\/acdelco-rear-brake-rotor-silver-18a2543a-gm19255508-direct-fit-improved-cooling-quiet-operation","provider":"North Trail Auto","version":"1.0","type":"link"}