You took a wrong turn somewhere. The recall fixes a starting issue, rarely a stalling issue. Frustrating none the less.
You probably have a defect not related to the fuel pump recall fix, or even the TIPM, that is difficult to pinpoint. I'm sure you are tech savy enough to identify the issue as a bad TIPM anyway. So swap it out. The hardest part is swapping all the fuses.
I think if you search for stalling you will find several possibilities, most of which suggest corrosion or defects in a connector, usually the TIPM. But there are certainly others that was not solved. If you don't want to burden a subsequent owner with the problem and don't want to drive a death trap, sell it to a scrap/recycling yard and have them flatten it. Then move on.
Every manufacture makes problem children, look at some of the GM threads if you want to feel better

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