I just went out in my garage to get something and I noticed that the 3rd break light on my 05 MC was on. I tried everything I could think of to turn it off, even started the car, I haven't been able to get it to go off. I was in the garage this morning and it wasn't on then and I haven't driven it in a couple of days. Any ideas why it has come on and what to do about it?

 

Welcome Rockfish!

Don't have an answer but I found this older thread. Might help(?)
https://www.northamericanmotoring.co...rd+brake+light

 

Thanks, I think that link at least helped me find out what the problem is. My passenger side carpet is soaked, must be from the air conditioner. I guess I need to figure what to do about that now.