chevy heater cores

I Have A 2002 Chevy 2500 Hd And The Core Is Leaking
It Has 60k Miles On It. Does Anybody Know How Hard It Is To Change And How Long It Takes? And Do I Have To Deal With The Ac System?i've Never Worked On The Newer Style Truck Before
Any Help Will Do
Thanks Mucky

you have to pull the dash carrier to replace, plan on a whole day if you haven't done one yet, you'll be pulling the hvac case to replace it.

you have to pull the dash carrier to replace, plan on a whole day if you haven't done one yet, you'll be pulling the hvac case to replace it.
thats what I thought. I think i'll let somebody else do it