A-Premium Rear Drum Brake Wheel Cylinder — 3/4" Bore Cast-Iron Direct-Fit for Chevy GMC Isuzu, Tested Seals

The A-Premium rear drum brake wheel cylinder is a direct-fit replacement with a 3/4" bore, cast-iron construction, and tested sealing for reliable brake actuation on compatible Chevy, GMC and Isuzu models.

If your vehicle uses drum brakes at the rear, the wheel cylinder is a key hydraulic component that pushes the brake shoes outward when you apply the brake pedal. This A-Premium unit is engineered to match factory dimensions and thread patterns for rear driver and passenger sides on select Chevrolet, GMC, Oldsmobile and Isuzu trucks and SUVs, helping restore correct braking function after a worn or leaking cylinder is removed.

Which vehicles will this wheel cylinder fit?

This wheel cylinder fits a range of 1990s and early-2000s light-duty trucks and SUVs from Chevrolet, GMC, Oldsmobile and Isuzu. Always verify year, make, model and axle position before ordering by using your vehicle info and the listing’s Special Notes.

• 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)
• Fits rear driver and passenger side; confirm fit with reference numbers like W37967 or 18017570

What are the key specifications and hardware included?

This cylinder has a 0.75 inch (3/4") inside diameter and uses a 3/8-24 inlet thread size, built from cast iron for durability. It ships with the bleeder screw installed but does not include a bleeder screw cap, so inspect your hardware needs before installation.

• Inside diameter (bore): 0.75 inch (3/4")
• Brake component inlet thread size: 3/8-24; thread diameter: 3/8
• Material: cast iron; bleeder screw included, bleeder cap not included
• Reference numbers for cross-checking: 18060160, 19213357, 8180601600, etc.

How is quality verified and what warranty is offered?

A-Premium subjects each wheel cylinder to pressure and high-temperature testing to help ensure leak-free operation under typical brake system loads. The part carries a one-year unlimited-mileage guarantee from A-Premium, giving added protection against early defects.

• Pressure-tested across a performance range to verify sealing integrity
• High-temperature exposure up to 120°C to check material stability and seals
• One-year unlimited-mileage warranty from A-Premium for manufacturing defects

How should I install and verify this part once received?

Installation should follow vehicle manufacturer torque specifications and brake bleeding procedures. After fitting the cylinder and reconnecting the brake line, bleed the brake system, check for leaks at the inlet, and confirm proper pedal feel and wheel rotation before driving.

• Use correct line fittings and 3/8-24 thread engagement to avoid leaks
• Bleed the brakes fully and inspect for weeping around the bleeder screw and inlet
• Test road at low speed to ensure even braking and no dragging or noise

Who this is for: This A-Premium rear drum brake wheel cylinder is intended for DIY mechanics, independent shops and fleet technicians restoring brake performance on compatible Chevrolet, GMC, Oldsmobile and Isuzu models. Choose this unit if you need a cast-iron, factory-dimension replacement with tested seals and a one-year warranty; confirm fitment with your vehicle details and the listed reference numbers before purchase.