LS Gen 3 Knock Sensor Relocation Extension Harness

This harness is a plug & play solution for relocating the knock sensors from the valley cover down to the sides of the block. Commonly used when installing an aftermarket dress-up valley cover without knock sensor provisions, or when installing an Gen 4 block in a vehicle with a Gen 3 PCM/Harness. Must be used with Gen 3 single-wire knock sensors, will not work with Gen 4 (2 wire) knock sensors.