My fuel pump seems to continue running even with engine off and drains battery overnight. I can hear it running inside the fuel tank but then also turns off when a door is opened. Am hoping it is the fuel pump relay and will try to test the old one before installing a new one. Has anyone run into a similar issue? Also, there is very little information out there on the relay location! Does anyone have a source of information on where on a 2016 Yukon the relay (part # 13509878) is located? Thanks.