Bought used from brother. 6.6L Diesel Duramax engine. Never a problem. Lots and lots of power with this engine. Maintenance easy for a DIY. I'll never go back to a gasoline powered P/U. I consistantly get 21 - 22 MPG on the highway, and 18 in town, when running with out a load. Everything solid, reliable and predictable. Would buy again in a minute. Brother chose this color. I'd never get navy blue. Requires lots of washing.
Engine and transmission.
Factory installed Line-X spray in bed liner would be a great option. Even though this is STD cab,would be nice to have 5 more inches behind the seats.