2010 Chevy Tahoe Excessive Battery Drain With All Systems Off - Replace Alternator Due To Bad Diodes

I replaced the alternator because it was draining the battery with all the systems off because the diodes in the alternator were bad.

[@SOspruce]

Hey, Justin. Thanks for the video. Just curious, did you replace the bad alternator with an OEM one, remanned one, or a random one?

[@mchenrykramer]

I don't think I got the OEM, but I remember not settling for the cheapest one. My wife is the kind that just expects things to work every time, so I gave up cheap patch job long ago.

[@Kingjefe302]

I’m having the same issue but auto zone says my alternator is good and I just bought a brand new battery I jump my truck then next day my Tahoe is dead

[@mchenrykramer]

I didn't take mine to get tested because sometimes the test machines are not accurate, or the store employees are not knowledgeable. With an inexpensive meter and a little time, you will know where the current draw is on your vehicle.

[@mybudgetmods7125]

Can I try and unplug alternator power supply for 2 days and plug it back in when I start it?

[@mchenrykramer]

Yeah, if you don't have a multimeter to use to measure the milliamp draw and have the time, you can disconnect one wire at a time to find which thing is drawing enough current to run the battery down that fast. It's the same process that you would use with a multimeter, just slower.

[@mybudgetmods7125]

Thanks Bro!! I bought a cheap Amazon alternator last year and had to keep jump starting my Tahoe if I left it for 2 days. I disconnected the power wire to alternator over the weekend and after 2 days it started!! I then bought a Remy alternator and installed it last Friday and tonight, after basically 3 1/2 days it started!!!!! Thanks bro for the video!!!!

[@silverdragontaylir8252]

Buy new if you can afford