I have a 2000 chevy impala 3.8 v6. I'm having a hard time determining what problems I am have and what to do to fix them. My car is having a rough idle and white smoke coming out of the exhaust with…

Llancaster

I have a 2000 chevy impala 3.8 v6. I'm having a hard time determining what problems I am have and what to do to fix them. My car is having a rough idle and white smoke coming out of the exhaust with coolant smell. I have checked the oil and I do not have no coolant in the oil and no oil in the coolant. Does anybody know what the cause and the solution could be??