A-Premium Rear Drum Brake Wheel Cylinder 15/16 inch Bore — Cast Iron for Chevrolet Silverado & GMC Sierra 1500 (2005–2008)

A-Premium rear drum brake wheel cylinder built from cast iron with a 15/16" (0.938") bore — designed as a direct replacement for compatible Chevrolet Silverado and GMC Sierra 1500 rear applications.

This A-Premium wheel cylinder replaces worn or leaking rear drum cylinders on select Chevrolet and GMC 1500 series trucks. It’s manufactured from cast iron, threaded for standard M10 x 1.0 brake line fittings, and delivered with the bleeder screw installed to simplify bleeding. Quality control includes pressure and high-temperature testing to reduce the risk of premature failure when you restore braking performance.

Which vehicles does this wheel cylinder fit?

This wheel cylinder is intended for various Chevrolet Silverado and GMC Sierra 1500 rear drum configurations across model years in the mid-2000s. Fitment depends on cab type and model variations; confirm application using your vehicle details before ordering.

• Compatible with multiple Silverado 1500 and Sierra 1500 rear drum setups from 2005–2008 depending on cab and Classic/standard designations.
• Designed for rear driver and passenger sides where a 15/16" bore is specified.
• Matches specific RPO codes (example: JF7) and OEM reference numbers for direct replacement.

What are the key specifications and materials?

The cylinder is cast iron for strength and corrosion resistance, with an internal diameter of 0.938" (15/16") to match factory hydraulic proportions. Threads and bleeding hardware follow common brake-system standards for easy installation.

• Inside diameter: 0.938 inches (15/16").
• Brake inlet thread size: M10 x 1.0; thread diameter: 10 mm.
• Material: durable cast iron construction; bleeder screw included (cap not included).

How reliable and tested is this replacement cylinder?

A-Premium subjects this cylinder to a range of tests to ensure consistent hydraulic performance and thermal durability. Pressure cycling and elevated temperature testing help confirm the unit holds pressure and resists degradation under demanding braking conditions.

• Pressure-tested across a broad range (from low to high pressure) to identify leaks and structural integrity issues.
• High-temperature exposure test at 120°C to check seal and material stability.
• Includes bleeder screw installed to simplify bench pressure checks and on-vehicle bleeding.

Who should choose this A-Premium wheel cylinder? Mechanics, DIY technicians, and fleet owners replacing leaking or seized rear drum wheel cylinders on compatible Chevrolet Silverado and GMC Sierra 1500 trucks will benefit. It’s suited for anyone seeking a cast-iron, OE-style replacement with verified pressure and temperature testing — verify your truck’s model year, cab type, and RPO codes to confirm fitment before purchase.