Hi, My problem is sometimes my Yukon(2000 NBS) will not start, it will cranking, but no start. On carbon cleaner or on alternative fuel(propane/LPG) will start. so there is spark. When I turn key on, no sound coming from fuel pump. But when working it working great. I found DTC in BCM B2973, does it have something to do with theft system, like cut out fuel pump? Is bad some microswitch in door lock, or bad ignition collumn assy? Thanks in advance.