A-Premium Brake Master Cylinder with Removable Reservoir 40mm Bore — Direct-Fit Replacement for 1994–2000 GM & Dodge Vehicles

High-quality replacement brake master cylinder with an integrated removable reservoir designed to restore firm hydraulic braking for select 1994–2000 Chevrolet, GMC, Cadillac and Dodge applications.

This A-Premium brake master cylinder assembly is a new, direct-fit hydraulic unit engineered for vehicles that use a vacuum booster and power-assisted brakes. Built from aluminum alloy with a 40 mm (1-1/8") bore and a 1/2-20 rearward outlet, the unit comes with a removable reservoir and matches several original-equipment reference numbers. It ships ready for installation after basic brake system preparation and bleeding, and A-Premium backs it with a one-year unlimited-mileage guarantee.

Which vehicles will this A-Premium master cylinder fit?

This assembly fits many full-size GM trucks, SUVs and a small selection of other models from the mid‑1990s to 2000. Compatibility is specific to gasoline models equipped with vacuum boosters and power brakes—always verify your VIN or exact model year before ordering.

• Chevrolet C1500 (Suburban) 1994–1999 and C2500 1994–2000
• K1500 (Suburban) 1994–1999, K2500 1994–2000, Suburban variants 1994–1998
• Chevrolet Blazer 1994, Tahoe 1995–2000; GMC Yukon 1995–2000
• Cadillac Escalade 1999–2000 and Dodge Ram 1500 1995–1996 (gas, vacuum booster)

What are the technical specs and materials used?

The master cylinder is manufactured from aerospace-grade aluminum alloy for corrosion resistance and strength. It features a 40 mm bore, a 1/2-20 rearward brake outlet, and includes a removable reservoir for fluid serviceability.

• Condition: New, fully assembled unit
• Material: Aluminum Alloys 101 for durability and weight savings
• Bore diameter: 40 mm (1-1/8") for compatible hydraulic pressure
• Outlet size: Rearward 1/2-20 thread; removable reservoir included

How do I confirm fitment and installation requirements?

Before purchase, match your vehicle’s year, model, and brake system (gasoline engine with vacuum booster and power brakes) to the listed applications. Also compare OEM reference numbers to ensure proper interchange and consult the "Special Note" on the product page.

• Compare provided reference numbers (M390259, 18021273, 18029967, 4778450) with your OEM part
• Enter vehicle details on the listing to validate compatibility
• Plan for brake system bleeding and basic preparatory steps at installation

What warranty and post‑purchase support does A-Premium offer?

A-Premium supports this master cylinder with a one-year unlimited-mileage guarantee, included to provide confidence in fitment and workmanship. For any issues or questions, the seller recommends contacting customer support and keeping purchase details handy.

• One-year unlimited-mileage warranty for manufacturing defects
• Customer support for fitment questions and returns
• Tip: retain your original part number and vehicle details when contacting support

Who is this for: This A-Premium brake master cylinder is intended for owners and technicians restoring braking performance on compatible mid‑1990s to 2000 full-size GM trucks and SUVs, plus the listed Cadillac and Dodge applications. It suits anyone looking for a new, aluminum-alloy direct-replacement unit with a removable reservoir and clear OEM cross-reference numbers, especially when a vacuum‑boosted power brake system is present.