I have a 2000 Blazer with 36 on it and a week ago I started hearing what
sounds like water boiling and poping coming from the pasanger side dash
inside the car.  It started at first to only happen for a few minutes in the
morning when first leaving, now its doing it more often now.  It only makes
this noise when you are pushing on the gas to speed up, and if in park and
pushing the gas and reproduce the same thing.  I did add a little coolent
yesterday, but still hear it and I am not finding anything leaking from the
heater core.  Any thoughts or suggestions?