Where is the knock sensor on a 02 Chevy truck with 6.0 engine?

The knock sensor on a 2002 Chevy truck with a 6.0L engine is located on the passenger side of the engine block, near the front. It's often near the distributor (if equipped) or in that general vicinity, but its precise location can vary slightly depending on the exact engine configuration. You'll likely need to consult a repair manual or online diagrams specific to your year and engine to pinpoint its exact position. A visual inspection with the engine bay relatively clear will be helpful once you have a general idea of where to look.