I'm sure my Chevy has went into regeneration but if and when it did, I haven't ever noticed. I am getting a little less MPG than I did with the 2007 Chevy Classic. But as for towing I am getting about the same if not a little better.
Also talked to Chevy dealer service department and ask about the reprogram of the ECM in ref to the letter from GM. I ask were there anything about a upgrade to increase fuel mileage and of course he laughed. Oh well cost nothing to ask. He did ask if I had any gadgets other that OEM and I said no, why would I need anymore HP or Torq when the Chevy Duramax is the most powerful HD on the planet
. I will take the Chevy in sometime this week. I think GM is on the ball as for as keeping the Silverado working at its best. GBY...