1 ton trucks and Crew Cab trucks were 1991.
Plus the OP mentioned a suburban (blazer too).
Really 1/2 ton and 3/4 ton trucks, regular cab and extended (which didn't exist in the old square bodies from the factory) went to IFS first, but the rest of the stuff, Blazer, Suburban 1/2 and 3/4, plus crew cabs and 1 ton dually stayed solid until 1991.
Good point about Kodiaks, I always forget them.