I would hope you've never had a problem, the oldest one you've owned was an '02! that hardly speaks about the longevity.
Also go work on a duramax compared to a cummins, those duramax's are a pain, the turbo sits right in the middle of the banks (really great for heat soak) and an injector swap has a labor time ofr 13 hrs + ona duramax because half is under the firewall and poorly placed.
Clay go look at one if you don't believe me.