well this morning i was going to school i started my truck turned the defrosters on and the cab filled with steam and i couldnt see a thing all the way to school and it smells like coolant when the heats on? whats wrong with my truck?

 

100% a leaking heater core. You have to pull the entire dash out to replace it too. If you're decent at working on cars and you get a manual you can tackle it, they're not that bad. Count on an entire saturday and if you're kind of slow some of sunday.

 

how much will the parts cost?

 

Oh probably $80 from the dealer. Check like advanceauto.com and rockauto.com and such, look around and you might find a better price.