Where is the knock sensors 2003 Pontiac grand prix?

The knock sensors on a 2003 Pontiac Grand Prix are located on the engine block, typically near the oil pan. Specifically, for the 3.1L engine, one sensor is usually found on the lower part of the engine, while for the 3.8L engine, there are two sensors located on the sides of the engine block. Accessing them often requires removing some components for better visibility.