Where is the knock sensor located on a 2001 Buick Regal?

On a 2001 Buick Regal, the knock sensor is typically located on the engine block, specifically on the lower side near the oil pan. It is positioned on the driver's side, just below the intake manifold. To access it, you may need to remove some components, such as the intake manifold or other nearby parts, depending on the specific engine configuration.