FILTERUP Hydraulic Power Brake Booster for Chevy & GMC 2003–2007, Aluminum Direct-Fit M10

FILTERUP 52-7371 is a direct-fit hydraulic power brake booster engineered to restore reliable braking performance on select 2003–2007 Chevy and GMC trucks without reusing your old spring or rod assembly.

If the brake pedal on your Avalanche, Silverado or Sierra feels hard or inconsistent, this FILTERUP hydraulic booster replaces vacuum systems by using power-steering fluid pressure to multiply braking force. Built from reinforced aluminum and designed to match OE mounting and stud thread dimensions, it fits a range of Chevy and GMC full-size trucks and SUVs and ships complete with an internal spring and rod assembly so you can install without transferring parts from the old unit.

What vehicles and part numbers does this unit replace?

This booster is manufactured to match the fit and function of several original equipment numbers so you can select it with confidence. It covers multiple Chevy and GMC models from 2003–2007 and is compatible with both light- and heavy-duty applications listed in the product fitment.

• Fits: Chevy Avalanche, Silverado 1500 Classic/HD, Silverado 2500/3500; GMC Sierra 1500 Classic/HD, Sierra 2500/3500, Yukon XL 2500 (2003–2007).
• Replacement numbers: 178-1031, 52-7371, 19371356, 15126867 and related OE cross-references.
• Master cylinder stud thread size: M10 x 1.5 for direct bolt-on compatibility.

How does the hydraulic booster improve braking compared with vacuum types?

Unlike vacuum boosters, this FILTERUP hydraulic unit uses pressure from the power steering pump, so braking assistance remains consistent even when engine vacuum is low. That makes it particularly useful in heavy-duty trucks, towing situations, or vehicles with engines that produce less vacuum at certain RPMs.

• Operates independently of engine vacuum for steady pedal feel at all engine loads.
• Amplifies braking force using steering-system fluid pressure for stronger stops in heavier vehicles.
• Maintains assistance during extended towing or steep-grade driving where vacuum can drop.

What are the construction and quality features of this FILTERUP booster?

The 52-7371 is manufactured from premium-grade aluminum with reinforced housing to resist corrosion and deliver long service life under load. FILTERUP supplies this booster with an internal spring and rod assembly so you won’t need to remove those parts from your old booster, simplifying installation and reducing the chance of seal damage.

• Durable aluminum housing with reinforced sections for increased strength.
• Includes spring and rod assembly — no transfer of old components required.
• Engineered to OE mounting specs to ensure correct alignment and function.

How do I prepare for installation and what should I check?

Before installing, verify the vehicle model year and the master cylinder stud thread size (M10x1.5) to confirm compatibility. Inspect power steering lines and fluid condition; a clean, properly bled steering system helps the hydraulic booster perform as intended.

• Confirm vehicle make, model, and year against the fitment list and product images.
• Verify master cylinder stud threads are M10 x 1.5 for proper bolt fitment.
• Check power steering fluid level and lines; replace or flush if contaminated before installation.

Who this is for: This FILTERUP 52-7371 hydraulic power brake booster is aimed at owners and mechanics restoring braking performance on 2003–2007 Chevy and GMC full-size trucks and SUVs—especially those who tow, haul, or drive in conditions where vacuum assistance is unreliable. If you need a durable, direct-replacement booster that arrives ready to install without salvaging old parts, this model is a practical, OE-compatible choice.