Buy OEM 2004 Buick Part # 19153684 (19420683, 26070099). Power Steering Pump. 1 ton. 3/4 ton, 7700, 8600 lb GVW. Express, Savana; 1 Ton. Express, Savana; 3/4 Ton; Over 7500 GVW. Power Steering

Power Steering Pump.
Over GVW 7,300 Lbs. Over GVW 8,600 Lbs. Power Steering Pump.

Power Steering Pump

Fits Express 2500, Express 3500, P30 , Savana 2500, Savana 3500

1 ton. 3/4 ton, 7700, 8600 lb GVW. Express, Savana; 1 Ton. Express, Savana; 3/4 Ton; Over 7500 GVW.
Power Steering Pump - Repair or Replace
If the steering in your 2004 Buick whines or groans, or if your steering wheel is hard to turn, you may have a failed power steering pump.