It would have to be my current truck, a 2016 Sierra 2500HD Duramax. I have owned 9 trucks in my lifetime, but this one stands out by all metrics except one- longevity. I just haven't had it long enough to judge, but so far it is flawless.
To win on the long life category, it will have to beat a '99 Ram 2500 Cummins, which never failed me in 100K miles and 17 years.

[Linked Image]

I'd rather be a free man in my grave, than living as a puppet or a slave....