Sunsong 3403967 Power Steering Pressure Line Hose Assembly - Hydroboost To Gear, Lower or Upper

Power Steering Pressure Line Hose for GM Vans

The Sunsong 3403967 power steering pressure line hose assembly is built for select Chevrolet Express and GMC Savana applications that use a male O-ring connection at both ends. It is engineered to restore steering system pressure delivery with fitment-specific dimensions and corrosion-resistant steel tubing for long-term service.

For drivers searching for a Chevrolet Express 2500 power steering pressure hose or a GMC Savana 3500 pressure line hose, this part number 3403967 is a direct-fit replacement for the listed hydroboost and upper/lower steering positions.

Key Features

• Part number: Sunsong 3403967
• Power steering pressure line hose assembly for steering system repair
• End 1: 16 mm male O-ring
• End 2: 18 mm male O-ring
• 40.5 in. (1028 mm) hose length
• CSM hose material for fluid resistance
• High-grade steel tubing with zinc electroplating for added corrosion resistance
• Pressure-rated to 1,500 psi working pressure, 8,700 psi burst pressure, and 1,600 lb tensile strength
• High-pressure tested before leaving the factory

Detailed Description

Sunsong 3403967 is a power steering pressure line hose assembly made for select Chevrolet Express and GMC Savana vans. It is engineered to match the original routing and connection style for applications including 2011-2014 Chevrolet Express 2500 upper and lower positions, 2013-2014 Chevrolet Express 3500 upper, 2011-2014 GMC Savana 2500, 2013-2014 GMC Savana 3500 upper, and 2015-2016 GMC Savana 3500 hydroboost to gear. The hose uses male O-ring fittings in 16 mm and 18 mm sizes for a precise connection at the steering system.

Built with high-grade steel tubing and zinc plating, this pressure hose resists rust and corrosion from humidity, road salt, water, and grime. The hose material is CSM, and the assembly is pressure tested for consistent operation. This makes the Sunsong 3403967 a practical replacement when servicing a Chevrolet Express 2500 power steering pressure line or a GMC Savana 3500 steering hose assembly.

This part cross-references Gates 352472 for the same application.

Common Problems This Part Can Address

• Power steering fluid leaks at the pressure line
• Loss of steering assist from a damaged hose
• Corrosion on steel steering lines
• Cracked or worn hose sections from age and heat exposure
• Improper fitment from a mismatched replacement hose

Installation Notes and Tips

Verify the vehicle position and connection style before installation. This hose is listed for upper, lower, and hydroboost-to-gear applications depending on the vehicle, so match the exact year, make, model, and position to the original part. Inspect mating surfaces, O-rings, and surrounding steering components for wear before reassembly.

Because the assembly is precision engineered to exact fit, proper routing and alignment are important to avoid stress on the hose and fittings. Confirm the 16 mm and 18 mm male O-ring ends match the vehicle’s steering system connections.

Quality Assurance

Sunsong states that each hose is subjected to a high-pressure quality assurance test before it leaves the factory. The assembly is built to exceed original equipment performance standards for pressure, burst strength, and tensile strength.