The first buses operated by GO Transit, a suburban variant of the GM New Look bus, were unveiled at Queen's Park on August 11, 1970, about a month before commencing operations on its expanded services east, west and north of Toronto. Operated by Gray Coach, a pilot program to test them was conducted in Pickering before they entered service on 8 September 1970. Later buses included a combination of single-door, suburban-type transit buses built by Orion Bus Industries and New Flyer, and single-level highway coaches built by Prevost Car and Motor Coach Industries (MCI, now a subsidiary of New Flyer).