From 1992 to 2009, there have been 1/2 ton (1500) and 3/4 ton (2500) Chevrolet (and GMC?) Suburbans.

It also looks like there were 3/4 ton Suburbans from 1987-1991; and, it looks like there was a 20-series (C20 & K20) Suburbans in 1967 and newer.