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Black 52-7421 AU0507-HB033 OEM Hydraulic Power Brake Booster
Modern GM heavy trucks need consistent brake assist. Our black 52-7421 hydro boost unit delivers steady hydraulic braking power for daily heavy loads.
1 year warranty
Support OEM/ODM
ISO9001/IATF16949 Certification
Product Description
52-7421 Black Hydraulic Power Brake Booster without Master Cylinder
The 52-7421 (AU0507-HB033) black hydraulic power brake booster is a master-cylinder-free hydro-boost unit engineered for 2015-2019 GM heavy-duty pickup and SUV models. Crafted from rugged cast iron and finished with premium black rust-prohibitive coating, this unit resists oxidation, moisture erosion and outdoor wear for extended service life in harsh driving environments. It features a compact 54.81mm (2.158 inch) housing diameter and dual standard stud thread sizes of M12×1.75 and M10×1.5, ensuring precise mounting and pipeline matching for GM heavy-duty brake systems. Our hydro brake booster factory provides custom surface coating thickness adjustment and thread precision calibration for bulk orders, while our professional brake booster company offers exclusive aftermarket finishing customization for global distributors.
This aftermarket hydraulic booster fits diverse commercial application scenarios, including modern GM heavy-duty fleet routine brake maintenance, professional auto repair shop brake system overhaul, second-hand HD truck/SUV renovation and global heavy-duty brake parts inventory replenishment. It precisely matches 2015-2019 Chevrolet Silverado 2500 HD/3500 HD, 2016-2019 Chevrolet Suburban & Suburban 3500 HD, as well as 2015-2019 GMC Sierra 2500 HD/3500 HD models with 6.0L and 6.6L V8 engines.
Product Information
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Main Part Numbers
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52-7421, AU0507-HB033
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Product Type
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New OEM Hydraulic Hydro-Boost Power Brake Booster (No Master Cylinder)
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Housing Material & Finish
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Heavy-duty Cast Iron with Black Rust-Prohibitive Protective Coating
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Housing Diameter
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54.81 MM / 2.158 IN
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Master Cylinder Stud Thread Size
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M12 × 1.75 / M10 × 1.5 Dual Specification
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Application
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Vehicle Make
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Vehicle Model & Trim
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Production Years
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Chevrolet
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Silverado 2500 HD / 3500 HD
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2015 – 2019
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Chevrolet
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Suburban / Suburban 3500 HD
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2016 – 2019
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GMC
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Sierra 2500 HD / 3500 HD
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2015 – 2019
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Universal Fit
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All Above Compatible Models
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2WD & 4WD Drivetrain Systems
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PRODUCT TAGS:
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