Yea Hank Wiki says they started in 1992 and full in by 1996. Like I said they still use the 700R4 name up to the 1992-1996 electronic phase in. Yea and Wiki did say that the Sty/Ty trucks had the built (from factory) 700R4/4L60 trans. GM's official language after 1990 was 4L60 for non-electronic type O/D trans. WE still call them 700R4's.