Chev engine Chevy or Workhorse chassis. I think in 2001, they hadn't yet started with the Allison trans.
Look the coach over really well, seams, drawers, fit, etc. Some mfg's long time integrity is a little lacking. Some are superior. I used to sell both new and used RV's, and I have seen quite an array in condition. Especially in drawer construction and slides on the drawers. These can be fixed for the most part, but some, the drawer body itself is a plastic tray, these are throwaways if they break.