If you have a L5P Duramax Don’t let them do the update for regens, mine used to to 4 to 6 hundred miles between regens, after the recall now 2 to 3 hundard miles
My bet is that the programming change of initiating more regens is because our trucks seldom enter into a situation where they can do one long complete regen before we either reach our destination or enter into traffic conditions that interrupt the process.