the last few weeks I have been smelling antifreeze when I have the heater on. Yesterday I checked, and the radiator was low on fluid. I've never seen a puddle under the truck, so I'm thinking that it is the heater core that has a leak (most likely a pressure leak). How difficult is this to change?
'93 GMC 1500 w/ 4.3
I've never even looked to see where the heater core is located or how hard it will be to get to.