I've removed the the fuses in my Tahoe for; power door locks, heated seats & mirrors. Unplugged the underhood light, & lighted passenger vanity mirror. Removed the dome light & glove box bulbs. Checked the alternator myself with a good digital VOM & even had an auto electric shop load test it. It was driving me nuts.
I've seen many lighted vanity mirrors on the passenger side of all brands of vehicles, but didn't know this over optioned damn thing had one on the driver side as well. I'd never used the sun visor, & the cover was closed on the mirror with the light on.
Before I found the additional lighted mirror, I installed an inline, remote control power disconnect I found on Ebay. It has a key fob just like the power door lock one. Sold as an anti-theft device, which is an adder, but another way to halt battery drain.
