A-Premium Rear Drum Brake Wheel Cylinder — Direct-Fit for Chevrolet & GMC Silverado/Sierra 2005–2008, 1.0625 in Bore, Left/Right

A-Premium rear drum brake wheel cylinder designed as a direct-fit replacement for specified Chevrolet Silverado and GMC Sierra 1500 models, restoring proper rear braking function.

This wheel cylinder is a precision replacement component engineered to match factory dimensions and mounting points for select 2005–2008 Silverado and Sierra trucks (see vehicle fitment details). It replaces the hydraulic actuator inside the rear drum that pushes the brake shoes outward when you apply the brake pedal, helping maintain consistent braking response. The assembly offers a 1.0625 inch bore and is supplied with a one-year unlimited-mileage guarantee from A-Premium.

How do I confirm this part fits my truck?

Fitment depends on model year, rear drum configuration, and RPO code JF3. Enter your vehicle year, make, model and RPO codes when ordering and compare the listed reference numbers to your OEM part or service manual to be sure.

• Compatible with Silverado and Sierra 1500/1500 HD models 2005–2008 with rear drum brakes and ABS.
• Fits left and right rear positions (driver and passenger side).
• Requires RPO Code JF3 for some model years — select B0DB5NPTY8 if needed.
• Reference numbers: W610132, WC370181, 19133370, 89059127 for cross-checking.

What are the key specifications and why they matter?

The most important spec is the bore diameter—1.0625 inches—which determines piston size and hydraulic performance inside the drum. Correct bore and mounting alignment ensure even shoe application, proper fluid sealing and predictable brake pedal feel.

• Bore: 1.0625 in — matches factory hydraulic force and travel.
• Direct-fit mounting points — no custom modifications required.
• Designed for vacuum-boosted, power brake systems with ABS.

How difficult is installation and what should a DIYer know?

Installation is moderate for someone with basic brake-service experience and common tools. It requires removing the drum, detaching the old cylinder, and bleeding the brake system after installation to remove air from the lines.

• Tools needed: jack and stands, drum puller or slide hammer, basic hand tools, brake bleeder.
• Plan for brake fluid handling and proper disposal of waste fluid.
• If uncertain, have a certified mechanic perform installation and final inspection.

What warranty and quality assurances come with this part?

A-Premium backs this wheel cylinder with a one-year unlimited-mileage guarantee, offering coverage for defects in materials and workmanship. The part is manufactured to meet industry fit and function standards and is intended as a reliable aftermarket replacement.

• One-year unlimited-mileage warranty included.
• Manufactured to match OEM mounting and bore dimensions.
• Sold with fitment notes and reference numbers to reduce installation errors.

Who is this for: This A-Premium rear drum brake wheel cylinder is aimed at owners and technicians working on Chevrolet Silverado 1500/Sierra 1500 trucks and their HD/Classics from 2005 through 2008 that use rear drum brakes with ABS and the JF3 option. Choose this part when you need a reliable replacement that matches factory dimensions, want to restore consistent rear braking performance, and prefer a part backed by a one-year guarantee. Always verify your vehicle specifications and RPO codes before purchase to ensure proper fitment.