A-Premium Rear Drum Brake Wheel Cylinder 3/4" Bore — Left & Right Rear Cast-Iron, OE Fit for Chevy GMC Isuzu

The A-Premium rear drum brake wheel cylinder is a direct-replacement cast-iron cylinder with a 3/4-inch bore designed to restore rear braking performance on compatible Chevy, GMC and Isuzu trucks and SUVs.

This precision-manufactured wheel cylinder rebuilds hydraulic pressure at the rear drum brakes. It is sold as left and right rear (driver and passenger) wheel cylinders and is engineered to match OE-style dimensions and fastening points so it fits popular models from the 1990s and early 2000s. The unit has passed high-pressure and elevated-temperature testing to meet durability expectations for brake system components.

Which vehicles will this A-Premium wheel cylinder fit?

The cylinder covers a range of Chevrolet, GMC, Isuzu and Oldsmobile rear drum applications. Fitment includes postal and compact trucks and their SUV variants—confirm your exact year and model before ordering.

• Chevrolet: LLV (1994–1995), S10 (1992–2002), S10 Blazer (1992–1994)
• GMC: Jimmy (1992–1994), Sonoma (1992–2002), Typhoon (1992–1993)
• Isuzu: Hombre (1996–2000)
• Oldsmobile: Bravada (1992–1994, 1996)
• Always enter your vehicle details in the listing’s top-left fitment tool and review Special Notes before purchase.

What are the key specifications and parts included?

This cylinder is built from cast iron to withstand brake fluid exposure and mechanical load. It ships with the bleeder screw installed but does not include a bleeder screw cap.

• Bore (inside diameter): 0.75 inch (3/4")
• Brake component inlet thread size: 3/8-24; thread diameter 3/8
• Material: cast iron for structural durability
• Included: bleeder screw; Bleeder screw cap: not included
• Reference numbers: W37967, 18017570, 18060160, 19213357, 8180175700, 8180601600

How was this wheel cylinder tested for reliability?

A-Premium subjects each wheel cylinder to strict performance checks that simulate real-world braking conditions. Tests cover both pressure endurance and elevated-temperature resilience to help ensure consistent braking response.

• Pressure test range: from 0.2 MPa up to 20 MPa
• High-temperature test: 120°C exposure to verify thermal stability
• Dimensional and thread inspections to confirm correct fit and sealing

What warranty and buyer protections are offered?

A-Premium provides a straightforward limited warranty and quality support for this brake component. The guarantee is intended to give buyers confidence in part longevity and fitment.

• One-year unlimited-mileage warranty from A-Premium
• Wide accessory selection and customer support for installation questions
• Return and fitment guidance available—verify vehicle compatibility before installation

Who is this for: mechanics, restoration enthusiasts and fleet operators who service 1990s–early-2000s Chevrolet, GMC, Isuzu or Oldsmobile vehicles with rear drum brakes. Choose this wheel cylinder if you need an OE-style cast-iron replacement with a 3/4" bore and verified pressure/temperature testing. Confirm your exact model year and axle side (rear driver or passenger) using the listing fitment tool and review the Special Notes before purchasing to ensure proper fit.