Silverado 1500 2004, Hi Flow P-Series Power Steering Pump (SP1401) by PSC Motorsports. Quantity: 1 per Pack. SC power steering pumps use larger rings and rotors to move more fluid per revolution, greatly benefiting Rock Crawlers running low rpm's. They're used in conjunction with cylinders and hydraulic-assist setups. With modifications, these pumps will work with full hydraulic steering. The cans on PSC pumps are designed to be used with remote reservoirs (sold separately), which can be purchased in kits that include pump, remote reservoir, hose, and bracket. Whether interested in one piece or the entire kit, PSC power steering pumps will turn your tires, making for fun 4-wheeling.