Where is the knock moduler located on a 1994 Chevy Cheyenne with 4.3 L engine?

The knock sensor on a 1994 Chevy Cheyenne with a 4.3L engine is typically located on the passenger side (right side) of the engine block, near the front. It's usually mounted towards the bottom of the block, often near the oil filter or oil pan.

However, the exact location can vary slightly depending on the specific engine configuration. You'll likely need to consult a repair manual or a detailed diagram specific to your 1994 4.3L engine to pinpoint its precise position. A visual inspection with the help of a flashlight and maybe even a mirror may also be necessary.