2006 Buick lucerne just shuts off while driving for no reason

This Buick only has 79,000 miles on it when driving down the high way it just shuts off and then won't start for about 10 minutes it does nothing for the 10 minutes I turn the key and not even a click I took the starter down cleaned all the connectors didn't see anything wrong with it I have read that there are a lot of problems with the buicks doing this, it not the relay in the fuse box under rear seat that controls the fuel pump, it does not even turn on the check engine light how do I find this issue? I scanned it and it has some B2555,B3205,B1590. They are all back codes everythseams to work in the car not sure why have these codes I didn't look but I think the are history codes. Any help please ?

Check for 5 volts at a sensor under the hood throttle body during the malfunction.

Or 2nd option would be during malfunction check resistance at data link connector pins 6 and 14 with it powered down. Should see 60 ohms if you see 120 or anything other than 60 there is an issue.

I will check thank you

I agree with checking for 5v ref. The codes make me think you have a short that happened. I’d check your fuses and see if you find a blown fuse. Then look for wiring damage if you fine a blown fuse.

bizz2222 wrote: I scanned it and it has some B2555,B3205,B1590. They are all back codes everythseams to work in the car not sure why have these codes I didn't look but I think the are history codes.

The '06ish gm products I've looked at didn't handle B and U codes in the same way as P codes. They only had active and historical status. As soon as the fault clears they get moved to history immediately unlike a P code which has to go several drive cycles before it'll change to historical. So looking them up just to see what sets them might give you some direction. Also clear them out and see if the car shutting off brings them back.