2001 Pontiac Bonneville Smoking when started

Hi, thank you for responding. When I checked the oil it just looked really dirty to me (it's a bit passed 3,000) but nothing suspicious there that I could see anyways. After I shut the car down and pop the hood I can't tell where the smoke is coming from. To me it seems like something really burned up because the smoke is dark and very stinky. I really don't think it could be any fluids leaking onto anything else because I live in WI and the two times this has happened it's been pretty cold out and the car had been sitting and was very cold (nothing hot to create steam or smoke from burning on another surface.) It seems almost like a short or quick fire must start and extinguish. The other thing it seems like is if a belt is getting ready to break or something. It has that burnt rubber smell but can't find any evidence that it's a belt. Everything works fine in the car. Also when it does this it's a pretty good amount of smoke. Both times the whole interior of my car was filled with smoke and smoke pours out from both sides of the hood. One other thing I've been noticing is that the battery volt gauge has been high lately - not in the middle like normal but not in the red area either about 1/2 way between normal and red. Hope this helps! Thanks!