Vengts blow coolant smell all the time. I have closed the vents but it still smells. The coolant reservior looks low but isnt, however, fluid is dark.

Can I drain, flush and refill reservior?
What about antifreeze, would it need to be filled or flushed/replaced?

New to working on trucks do need some serious help. I can change oil and thats about it with out F%$KING something up. Thanks

 

Do a search for Heater Core replacement because that's what you have. I just went through the same thing in my '99 a couple weeks ago. The heater core is located behind the dashboard inside the truck. In order to change it you have to remove the entire dashboard which is a PITA. I would quit driving the truck until you get it fixed if possible because the leak in the Heater Core will eventually get worse and leak on to the carpet in the passenger side floorboard.

 

Yep heater core is out and they aren't easy to replace. It will soon leak coolant on ur carpet. Better get it changed out.