New Here. Help me decide.

[baddarryl]

Hi all. I am getting ready to upgrade my 2000 Silverado 2500 gasser. It has been and still is a fantastic truck. I need a one ton deisel and am heavily leaning towards the Duramax. I am looking at 2 to 3 year old single axels. The emissions on modern diesels scare me a bit, but I want a new to me truck that will be reliable. That Is why I am looking at relatively new. I guess my real question is how reliable are these in the first five years? Also does the factory warranty extended to second owners? I have considered buying new to get those warranties but don’t quite have the money for that and I need a truck pretty soon. I can tinker and wrench pretty well but certainly don’t have the knowledge and tools for modern diesels. I am also considering a Dodge but not nearly as much. Thank you