Help pleasee!
 

So my 1995 Cadillac STS showed me the "check coolant level" in the information display. I didn't take immediate action and now 2 weeks later i turn my car on and it made a gunshot noise and a little bit of smoke came from under the hood. Is this something serious, rather than just refilling it with antifreeze/engine coolant? I can't drive it right now either. It feels as if its breaking when it moves, and wheni turn the wheel, the tires or something make some sort of little screeching sounds. :confused:

Anyone!? I can't even get the cap off to put engine coolant in...!! Ughhh