[72moneypit]

GreenMystChevy

I just finished replacing my heater core last weekend on my 72 Cheyenne. It wasn't that diffucult, except for two bolts on the underside of the heater core box that you have to get to from under the truck. (It wigs me out to crawl under the truck... that's why I'm not a mechanic!) I picked up a new heater core for less than $30 bucks at the local AutoZone.

I did ask my local mechanic what he'd charge, and was quoted 5 1/2 hours for labor... I thought that was way too much, so did it myself in about 2 1/2 hours. It's been a week, and no leaks!

Here's what I did. I have a factory AC truck... not sure if the process is different for non-AC trucks

1. Disconnect battery
2. Disconnect heater hoses from firewall.
3. Remove glove box and glove box door.
4. Disconnect the plastic ventilation "distributor" from heater core box.
5. Remove 4 nuts (firewall side) from box/plate surrounding area where heater core pokes through firewall. Top 2 are easy, bottom 2 are hard to get to.
6. Remove additional 2 or 3 bolts from interior side.
7. Remove heater core box from truck.

Reverse procedure to install new one.

Good luck!

Paul