Where is the water pump on a 2004 Chevy Silverado LS 5.3 Liter Engine?

On a 2004 Chevy Silverado LS with the 5.3L engine, the water pump is located at the front of the engine, on the passenger side. It's driven by the serpentine belt. You'll likely need to remove the serpentine belt to access it properly for replacement or repair.