2006 Buick Lucerne randomly turns off

[3.8fan]

car turns off while driving or stopped
My 2006 Buick Lucerne 3.8 turns off sometimes while driving or when stopped. It turns off and then I put it in park or neutral and then it turns back on instantly like nothing happened? I’m not sure what it is or could be since it hasn’t come up with any codes for anything either.

 

[2007LucerneCXL]

Intermittent is a guess. Have you done a professional scan and checked for stored codes as not every problem with tick the CEL. Alternator, fuel pump or fuel, ICM are all best guessing on what to maybe look at. The 06 doesn't have the rear seat fuse box problem.