Gates 363520 Power Steering Return Line Hose Assembly - Hydroboost To Pump

Gates 363520 Return Line Assembly

The Gates 363520 power steering return line hose assembly is built for hydroboost-to-pump routing on a wide range of GM trucks and SUVs. With a 35-inch length and a 3/8-inch I.D. molded reservoir hose end, it supports direct replacement needs for vehicles such as the Chevrolet Silverado 2500 HD and GMC Sierra 2500 HD.

Key Features

• Power steering return line hose assembly for hydroboost-to-pump applications
• 35-inch overall length for listed GM fitments
• End 1 uses an I.D. molded reservoir hose connection
• End 1 diameter: 0.375 in.
• Gates Return Line Assembly product line
• Part number 363520 for catalog and cross-reference lookup

Product Details

This Gates Return Line Assembly is specified for hydroboost steering systems where the return line routes fluid from the hydroboost unit back to the pump. It is listed for many Chevrolet and GMC applications, including Silverado, Sierra, Suburban, Yukon, Tahoe, Avalanche, and Hummer H2 models across the 1999-2017 range. The 363520 part number is also cross-referenced with Dayco 80403 for the same application.

Compatible vehicle coverage includes Fits 2001-2010 Chevrolet Silverado 2500 HD, Hydroboost To Pump; Fits 2001-2010 GMC Sierra 2500 HD, Hydroboost To Pump; and Fits 2003-2007 Hummer H2, Hydroboost To Pump. Additional coverage includes Chevrolet Suburban 2500, GMC Yukon XL 2500, Cadillac Escalade, and related GM hydroboost-equipped platforms. Gates 363520 is a direct-fit style replacement for the listed return line routing.

Common Problems This Part Addresses

• Cracked or leaking power steering return hose
• Fluid seepage at the hydroboost-to-pump return path
• Restricted or deteriorated return line on aging GM steering systems
• Loss of steering assist caused by hose failure or fluid loss
• Service replacement for damaged molded reservoir hose connections

Installation Notes and Tips

Verify the vehicle’s hydroboost-to-pump routing before ordering, since this assembly is listed for specific GM return line applications. Match the 35-inch length and 3/8-inch hose end diameter to the original routing and connection style. Inspect adjoining power steering components, clamps, and fittings for wear before installation, and confirm the system is properly bled after service.

Quality Assurance

Gates manufactures the 363520 as part of its Return Line Assembly line for steering system service applications. This part is cataloged for direct replacement use on the listed GM vehicles and is supported by OE-style fitment references for application matching.