Where's the post for changing out heater core box? Thanks

 

https://dodgeforum.com/forum/2nd-gen...placement.html

you don't need to disconnect the ac evaporator canister thing. i just took the bracket loose and pulled the evap case back until the ac condenser was pinned to the firewall and i had enough room to get the heater core out. if you disconnect it then you'll have to get the ac system refilled.

 

Thats what I want to do.i'm gonna change out heater core and evaporator. Is this the right link for that?
2001 2500 5.9

 

yes. did you read it? that thread is multiple pages.