[Miner25]

I’m hoping others may know of this to solve the problem easier. I am leaking coolant into the cab of the truck and all the steam is coming through my vents and my heater does not work. I was thinking it might be the heater core but wanted to get some opinions befor I tore into it. Any help would be grateful!

 

[98whitelightnin]

It really cant be anything but the heater core. Time to pull the HVAC box

 

[KATOOM]

Worth the read if you're going to be doing this job yourself... https://www.cumminsforum.com/forum/98-5-02-non-powertrain/2479477-heater-core.html

 

[Stormin08]

you can try the drain tube, but if it coolantheater core is the only item with coolant in the cab.

 

[Miner25]

Thanks guys it was the heater core. It was a b!+ch to replace but done