{"product_id":"dorman-brake-master-cylinder-m390259-for-1994-2000-gm-trucks-suvs-new-oem-style-epdm-seals","title":"Dorman Brake Master Cylinder M390259 for 1994–2000 GM Trucks \u0026 SUVs — New OEM-Style, EPDM Seals","description":"\u003cp\u003e\u003cstrong\u003eThe Dorman M390259 brake master cylinder is a 100% new, precision-engineered replacement built to restore original braking function on select 1994–2000 GM and related trucks and SUVs.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis master cylinder is manufactured to match the design and performance characteristics of the original component so it installs and operates like the factory part. Constructed from new materials rather than reconditioned cores, it features a housing cast to similar specifications and EPDM rubber components formulated for resistance to glycol-based brake fluid. Before buying, enter your vehicle trim into the garage tool to confirm exact fitment for makes and model years listed.\u003c\/p\u003e\n\n\u003ch3\u003eWill this Dorman M390259 master cylinder fit my vehicle?\u003c\/h3\u003e\n\n\u003cp\u003eFitment depends on year, make, model and trim. This part covers many Chevrolet, GMC, Cadillac, Dodge and GMC Yukon applications from the mid-1990s through 2000, but you must verify fitment with your vehicle details.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCompatible with multiple Chevrolet C\/K series trucks, Suburban, Tahoe and Blazer years shown.\u003c\/li\u003e\n  \u003cli\u003eFits GMC C\/K trucks, Suburban and Yukon for the listed model years.\u003c\/li\u003e\n  \u003cli\u003eCompatible with Cadillac Escalade (1999–2000) and Dodge Ram 1500 (1995–1996) where specified.\u003c\/li\u003e\n  \u003cli\u003eUse the garage tool and Confirmed Fit indicator; hover the blue “i” for additional notes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this master cylinder compare to the original equipment?\u003c\/h3\u003e\n\n\u003cp\u003eDorman engineers this part to match the original’s casting profile and operating characteristics, so pedal feel and hydraulic performance are similar to factory specifications. It meets SAE standards and uses new materials to reduce the chance of premature failure versus remanufactured units.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eHousing cast to resemble original material and dimensions for proper mounting and function.\u003c\/li\u003e\n  \u003cli\u003eEPDM rubber seals resistant to common brake fluids for durability.\u003c\/li\u003e\n  \u003cli\u003eDelivered brand-new — no used cores or reworked internals.\u003c\/li\u003e\n  \u003cli\u003eManufactured to meet rigorous SAE International specifications for safety and consistency.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the practical benefits of installing the M390259?\u003c\/h3\u003e\n\n\u003cp\u003eReplacing a failing master cylinder with a proper-fit new unit restores hydraulic integrity and helps maintain predictable stopping performance. Because the unit is built to original-like specifications and uses quality materials, it reduces the likelihood of fluid leaks, soft pedal feel, and other common symptoms associated with worn master cylinders.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eRestores correct brake pressure distribution and pedal feel.\u003c\/li\u003e\n  \u003cli\u003eNew EPDM seals limit fluid degradation and leakage over time.\u003c\/li\u003e\n  \u003cli\u003eNew construction lowers risk compared with remanufactured alternatives.\u003c\/li\u003e\n  \u003cli\u003eDesigned for direct replacement on confirmed-fit models for straightforward installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I check before installation?\u003c\/h3\u003e\n\n\u003cp\u003eConfirm fitment in the garage tool and inspect mounting points, reservoir connections, and brake line fittings for compatibility. After installation, bleed the brake system to remove air and verify pedal firmness and leak-free connections before driving.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eVerify part fits your exact year, make, model, and trim in the garage tool.\u003c\/li\u003e\n  \u003cli\u003eInspect brake lines and fittings for corrosion or damage; replace if needed.\u003c\/li\u003e\n  \u003cli\u003eFollow proper bleeding procedure to eliminate air and ensure consistent pedal response.\u003c\/li\u003e\n  \u003cli\u003eTest brakes at low speed in a safe area to confirm operation before normal driving.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Dorman M390259 is aimed at DIY mechanics, independent shops, and fleet technicians restoring braking performance on compatible mid‑1990s to 2000 GM trucks, Suburbans, Tahoes, Yukons, select Cadillacs and Dodge Ram 1500s. If you need a brand-new, direct-fit master cylinder built to original-like specifications and long-term resistance to glycol-based brake fluids, this part is a practical replacement option — just confirm exact vehicle fitment before ordering.\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 master cylinder new or remanufactured?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The Dorman M390259 is entirely new—no remanufactured parts—made from new materials for reliability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I still need to bleed the brakes after installing it?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Bleeding is required after installation to remove air and restore proper pedal feel.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":48083124977822,"sku":"B001PYRLAM","price":64.97,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/dorman-m390259-front-view.jpg?v=1785825707","url":"https:\/\/northtrailauto.ca\/products\/dorman-brake-master-cylinder-m390259-for-1994-2000-gm-trucks-suvs-new-oem-style-epdm-seals","provider":"North Trail Auto","version":"1.0","type":"link"}