I have a 02 excursion, today when i turned the key to the start position, i hear the key in the ignition chime as normal when the door is open. i close the door and it goes off as usual and i hear a steady buzzer that normally goes off when engine starts, only this time it comes back on shortly after engine starts and stays on. truck running as usual, no issues, no check engine light, just that annoying noise. shut engine down and it goes off. restart same issue. any thoughts on shutting it off? After further troubleshooting, i pull the 30A fuse located in fuse box on drivers side, position 116, labeled ignition, noise stops but Ex wont start, turns over but wont start. put fuse back in ex starts but annoying buzzer still there. any ideas? thanks Bob