[63corvette]

I have not owned a Duramax but I do have a motorhome with a Cummins.
I can tell you from experience that my Cummins has had no major issues but the small things have been a problem.
Another major issue is that Cummins has NO Procedure For Recall problems.
I had a controls issue and after I was towed to the Cummins shop I was told there was a recall on the parts which were bad. I said I did not receive the recall. I was then told Cummins does not send out recalls they just wait for a failure. Cummins does not have a recall system for owners notifying them of a recall.
So if you have a Cummins engine and it has a recall issue the only way you will know is if you research recalls on a regular basis or have a failure you will never know of it.
I have an issue with that after purchase of their product.
That is really an issue when a formerly recalled part fails after the warranty expires.
The owner then pays for the recalled part and may never know about it.
Been There Done That!!!!!!!!!!!
My 2 Cents