Sunsong 3402891 Power Steering Pressure Line Hose Assembly - Pump To Hydroboost

Power Steering Pressure Line Hose for GM HD Trucks

The Sunsong 3402891 power steering pressure line hose assembly is built for pump-to-hydroboost applications on select Chevrolet Silverado HD and GMC Sierra HD trucks. It is engineered to match the original routing and connection points while delivering pressure capacity and corrosion resistance for demanding steering systems.

• Fits pump to hydroboost steering applications on select Chevrolet Silverado 2500 HD, Silverado 3500, Silverado 3500 HD, Sierra 2500 HD, and Sierra 3500 HD models
• Male O-ring fittings: 16 mm end 1 and 18 mm end 2
• 41.25 in. overall length for OE-style routing
• CSM hose material for pressure-line durability
• High-grade steel tubing with zinc coating for added resistance to rust and corrosion
• Pressure tested before shipment for installation confidence
• Part number 3402891 cross-references Edelmann 80809 and Gates 352399 for the same application

Built for Pressure and Corrosion Resistance

This pressure hose assembly is manufactured to exceed original equipment performance standards, with a 1,500 psi maximum working pressure, 8,700 psi burst pressure rating, and 1,600 lb tensile strength. The steel tubing is electroplated with zinc to help resist humidity, road salt, water, and grime, making it a practical replacement for aging or leaking steering lines on Chevrolet Silverado 2500 HD and GMC Sierra 3500 HD trucks. The Sunsong 3402891 is precision engineered for exact fitment and restores the hose path used in pump-to-hydroboost steering layouts.

Common Problems This Hose Can Address

• Power steering fluid leaks from a worn or damaged pressure line
• Loss of steering assist caused by pressure loss in the hose assembly
• Corrosion on the original steel line from road salt and moisture exposure
• Cracked or deteriorated hose material from age and heat cycling
• Fitment issues when replacing a failed pump-to-hydroboost line on HD GM trucks

Installation Notes and Tips

Verify the vehicle’s steering layout before ordering, since this hose is for pump-to-hydroboost applications only. Confirm the 16 mm and 18 mm male O-ring connections and compare the 41.25 in. length to the original line for proper routing. Inspect nearby brackets, bushings, and heat protection during replacement so the new hose can be installed without stress or interference.

Quality Assurance

Each Sunsong pressure hose is high-pressure tested at the factory before it leaves production. That final inspection helps confirm leak-free operation and consistent performance for the replacement steering system.