DC released a new RRT yesterday that advises dealers to reflash ALL trucks before sale to the AU level software. So if you have yet to purchase, make sure the dealer performed the RRT and you will minimize the chances of a regeneration or turbo problem. And as I have said several times, if your truck has not been flashed in the last few weeks, you are probably best to get in and have it flashed. Doing so will ensure you have the latest changes just like unsold trucks.