Sorry about that, Im using truck harness and PCM for the swap of 5.3 to LS2 with LS3 heads and intake. I was just wondering if anyone had used the Katech harness ext. for the knock and cam sensor so the truck harness can be used. Also with the inj. I wanted to know if anybody has used the adapter plugs /harness to go from the truck harness to connnect the LS3 injectors? Im thinking I might just splice in new connectors for the inj. Hope this clears it up a little.