that body style is 88-98 but the 1 tons kept the old body style till 91 but my dad had a 1988 Chevy K1500 bought it brand new and just one awesome truck had plenty of power and even though it was 1/2ton my dad used it as a fram truck and treaded it like a 3/4 - 1 ton truck and it is very well maintained very little rust problems mainly just cab corners and a real little bit above rear wheel wells well i rolled the truck in jan. 2004 the cab top was totally smashed down well truck was totaled but i kept it almost two years after rolling it and it still runs like new just have some problems with gettin started (could use a tune up badly) but other then that still runs like new and does not burn any oil even now it steers tight suspension is good, one awesome truck was 5.7L (350) with automatic single cab fleetside long box
Nate