Hi, I am looking for a new (to me) truck and am considering a 2000 Chevy Silverado 2500 HD 6.0L gas truck with around 150k miles. It’s a 4x4.

Is this a reliable year/model and is there anything I should be aware of and/or ask about if I go to look at it? I’ll definitely take a look at the frame and underneath for rust. The main thing I care about is reliability, not bells/whistles.

Thanks for any advice/suggestions.