2005 Buick leSabre custom, Stalls at random. V6 3800.

You've spent 2 years like this? Why not take it to a mechanic? And get a new ignition module-

I've taken it to a few, paid a bunch of diagnostic fees. The problem is they have all sent it back saying it is all fine. Took it to a small local shop, a firestone location, and a dealership. The only shop it stalled for was the local shop. But he had no idea what would cause it. He had a few theories all of which have been replaced at this point. I have a few other cars I don't drive the Buick often even though I'd like to. So it hasn't been a high priority more of a tinkering project.

Ignition module ordered should be here this afternoon, I'll give it a shot

Ignition module replaced, thought this did the trick, but it stalled out again after about an hour of driving this time.

Greetings , if you haven't tried the fuel line may be clogged up . Had this happen to one of my Ford's years ago that sat for a long time . Took to a local guy and he figured it out . Love the LeSabre , one of the cars ever .

i had a vehicle that when it go up to normal temp or on a warm day it would stall and then wait a bit and start right back up, it turned out to be a Weak Vacuum line that would suck itself shut and the engine would stall, i replaced the vacuum line and it never did it again.