89 s10 steam in exhaust

[rachelw81]

I just bought an 89 s10 blazer it has a 4.3 L engine. I am losing water and oil and when the gas tank is FULL the smell of gas is so strong that you can taste it. I need help troubleshooting the steam comming from the exhust. The only thing I know of that could cause this is a blown head gasket however there is no water in the oil. I cannot tell where the water is comming from. What else could cause this other than a bad head gasket? Thanks for any help or advise.

Rachel