I've got a couple of newbish questions to ask. I'm about at my wits end with this truck so any help would be appreciated.

It's the truck in my sig, fwiw.

I've been driving with the qzilla on 0 for some time now but haven't tried completely pulling it yet... Anyway, truck has been somewhat hard starting for some time now and has been sounding almost like it's missing. In the past two months it's been getting progressively worse at idle or low throttle with bad chugging. It almost seems like the tc is locking after I'm slowing down, but I'm not sure how to test for that. What makes me think otherwise is that from time to time when it's in park and (qzilla) fast idle mode kicks in, it hunts/chugs until I press the accelerator. There are no signs of water in the oil, but it looks like I may be losing coolant. I'm thinking that maybe the headgasket is gone or the vp is dying (or both). How can I check for hg problems on this thing easily?

TIA.