how do you change the heater core on a 99 chev PU with a 5.7 on 1999 Chevrolet 1500 Pickup

the truck is steaming up the windshield and smell antifreeze need to know how to checnge the heater core do you have to remove the dash also like the older cars ???

Asked by for the 1999 Chevrolet 1500 Pickup
1 answer
not completely but the pass side does have to seperated from firewall to remove heater box