Dorman H620042 Brake Hydraulic Hose - Rear Left

Reliable Brake Hydraulic Hose for Chevrolet and GMC Trucks

The Dorman H620042 brake hydraulic hose is designed to provide dependable brake fluid transfer for heavy-duty Chevrolet and GMC trucks. Engineered for models like the Sierra 3500, Sierra 3500 Classic, Silverado 3500, and Silverado 3500 Classic, this flexible brake hose ensures consistent braking performance under demanding conditions.

• Compatible with Chevrolet Sierra 3500, Sierra 3500 Classic, Silverado 3500, and Silverado 3500 Classic
• Durable EPDM rubber hose material with a black rubber outer sleeve
• Overall length of 15.25 inches with a 12.63-inch axis length
• Ends feature treated steel fittings: banjo fitting on one end and female fitting on the other
• Includes necessary gaskets for proper sealing; mounting hardware and brackets not included

Durable Construction and Precise Fitment

This Dorman brake hydraulic hose (part number H620042) is constructed with EPDM rubber, known for its resistance to heat, ozone, and brake fluid degradation. The black rubber outer sleeve adds an extra layer of protection against abrasion and environmental factors. The hose features treated steel fittings on both ends—a banjo fitting with a 10 mm thread diameter and a female fitting with a 3/8 in-24 inside diameter—ensuring secure connections to the brake system. The included gaskets help maintain a leak-free seal during installation.

Applications and Common Issues Addressed

• Replacement for worn or cracked brake hydraulic hoses on Chevrolet and GMC 3500 series trucks
• Solves brake fluid leaks caused by damaged or deteriorated hoses
• Prevents brake pressure loss due to hose swelling or internal damage
• Restores proper brake pedal feel and responsiveness
• Addresses corrosion or fitting damage on original brake hose ends

Installation Notes and Tips

• Ensure the vehicle is securely lifted and supported before beginning brake hose replacement
• Use the included gaskets to prevent leaks at the fitting connections
• Do not reuse old mounting hardware or brackets; this hose does not include them
• Bleed the brake system thoroughly after installation to remove air and ensure proper brake function
• Inspect surrounding brake components for wear or damage during installation

Quality Assurance and Warranty Information

Dorman manufactures this brake hydraulic hose to meet or exceed OEM specifications for fit, form, and function. The use of treated steel fittings and EPDM rubber materials ensures durability and resistance to common brake system contaminants. This part is backed by Dorman's limited warranty, providing coverage against defects in material and workmanship under normal use.