I replaced the fuel pump on my 01 Yukon 5.3 and the new pump came with a new pigtail. The wiring diagram was absolutely baffling. Showing to connect wires in opposite ways. Needless to say, it now won't start and the fuel gauge is pegged around the 5 o'clock position. Something is wired incorrectly. Does anyone know what the wires coming off the old pump do by color & size? Two are thicker (diagram says fuel gauge sender?)
Any help is greatly appreciated- Jeff
Any help is greatly appreciated- Jeff