Re: New guy with a couple of problems
I'm not much help with the heater core diagram except to say that I've had the dash out of our '04 GM and it's a JOB! I'm also 63, but reasonably fit for getting this far, and it's tough working under the dash! Here's a tip, I removed the front seat just to make it easier and was glad that I did.
The oil filter mount assembly is also the same casting as the coolant intake. It bolts onto the block with four 10mm bolts, and R & R is straightforward. Just have fresh "O" rings/gaskets available. The dealer will have them on his parts schematic. It's been several years since I had one of mine apart, but I recall that the gasket was similar to the intake manifold gaskets, plastic with the "O" rings molded in.