You are bidding on a Kent Moore Duramax Powerstroke Injector Return Line Block Off Cap Tool CH-50377. This tool is in overall very good condition. Info Applications include - (May possibly have other vehicle/yr applications) 6.6L Duramax / 6.7L Powerstroke Use this tool to diagnose low rail pressure on 6.6L Duramax and 6.7L Powerstroke engines with Piezo injectors. .