Looks like after changing the fuel pump,and rebuilding the pressure regulator my problem is the ECM. Removed the glovebox but it appears you need to be a GM engineer to figure out how to unplug the harness let alone remove the ECM. Anyone out there have a method to remove this thing besides a crowbar or a sawzall? It looks like there are (2) clips on the left side which secure it to somehting mounted under the ECM. If I remove those clips will it allow room to pull the ECM? I'm stumped! All help appreciated as I would like to drive this truck again someday.