According to the 1992 brochure, they didn't have 170s back then. They appeared in 1993. It was a Versatile with 4 seats up front. You might have a 1993 Roadtrek built on a 1992 Chevy chassis. That often happens.
The brochure for 1993 is here: http://www.roadtrek.com/wp-content/u...model_year.pdf