Hey Dave,
I am having a similar problem. My truck will stall, usually while going uphill, and will then stall for a couple of days, but then self-resolve and be fine for weeks or months, only to stall again when I think it's fixed.
The first time I thought it was a fuel issue, but I had the fuel filter replaced and there is great pressure at the injectors, and it's still stalling, so that's not it.
The second time I had the distributor replaced, and it was fine for a month, and then failed again.
I have a 96 K1500 Suburban, and I'm either going to fix it this time or sell it - do you or anyone else have any recommendations?