PSC Hydro‑Boost Power Steering Pump for GM 6.6 Duramax (No Pulley)

The PSC SP1404 is a direct‑fit power steering pump built to deliver more steering assist where you actually use it—down low and under load. Designed specifically for 6.6L Duramax engines equipped with hydro‑boost brakes, this pump provides increased low‑RPM flow and a stable 1800 PSI pressure relief to help handle larger tires without overworking the system.

It bolts right in, reuses the factory pulley, and keeps an OEM‑style look with a matching reservoir and cap. The result is predictable steering feel, solid brake assist, and a no‑nonsense upgrade that just works.

Features:

• PSC‑grade high‑pressure hose assemblies
• Built specifically for 6.7L Cummins Hydro-boost trucks
• Correct lengths for clean and simple routing
• Helps maintain strong steering assist under load

Fitment:

• 2001–2004 (LB7 Duramax): Silverado/Sierra 2500HD & 3500
• 2004.5–2005 (LLY Duramax): Silverado/Sierra 2500HD & 3500
• 2006–2007 (LBZ Duramax): Silverado/Sierra 2500HD & 3500
• 2007.5–2010 (LMM Duramax): Silverado/Sierra 2500HD & 3500

Specification:

• High‑pressure hydraulic hose assemblies
• PSC‑spec crimped ends
• Designed for Hydro-boost 6.7L Cummins systems
• Full pump‑to‑Hydro-boost‑to‑gear pressure circuit

Notes:

• Direct Replacement for AC Delco GM19420690 - SP1404
• Clean all ports before threading in new fittings
• Don’t overtighten — let the fittings seat naturally
• Keep hoses away from exhaust heat and sharp edges
• Cycle the steering and brake pedal after install to move air out of the system