2004 Buick Le Sabre

Motor and tranny seem solid. Glass is good. Tires good. Here's the deal, I've driven the vehicle and it was running fine. Then, out of the blue it quits and wont start. I have tried various fixes. At present, it starts and drives, but once it warms up, it stalls out and won't start again until it cools down.

At present at the recommendation of a great mechanic, I replaced the ignition control module and map sensor, but I'm gun shy. the issue of quitting still is a mystery. My kids accuse me of being a used car dealer {incognito}. They have told if I don't downsize, it's the doghouse. So, it's got to go. [along with a few others]. Thanks for reading.