Where is the oil pump on 2004 Chevy Silverado?

On a 2004 Chevy Silverado, the oil pump is located inside the oil pan, which is situated at the bottom of the engine. To access the oil pump, you typically need to remove the oil pan, as it is mounted on the oil pump drive assembly connected to the crankshaft. Depending on the engine type (4.8L, 5.3L, or 6.0L), the exact location may vary slightly, but it remains within the oil pan area.