Troubles with my 1999 Chevy Suburban 4x4?

My 1999 Suburban has a misfire... it is leaking water through the exhaust pipe and white smoke comes out, and the radiator either leaks or just drinks the water in it ( I was told that it was something with the manifold intake or something or other). We have changed the spark plugs, changed the distributor cap and rotor.. I don't know what could be causing my "check engine" light to come on... I would appreciate any input. Thanks!
But if it would be the head gasket then there would be water in the motor right?
 
Back
Top