ii have noticed the floorboard on my passenger side is wet sometimes. window doesnt leak. hard to tell the true color of the fluid because of dirt in my carpet. however, sometimes i do notice a strong coolent smell, but not always. coolant level is fine most of the tme, but i do have to add some occasionally. does this mean i need to replace my heater core? could it possibly be the fill tubes themselves? how do i go about replacing the heater core? thanx in advance.

 

It's most likely the heater core. Maybe you can see it by pulling out the glove box. Not to sure i don't have a blazer but you might be able to get a good lok by getting the glove box out if not the dash has to come out.