For 1990, the second generation of the Kodiak/TopKick were introduced, shifting to the GMT530 architecture. The new chassis consolidated all GM medium-duty trucks under the Kodiak/TopKick model family, with the upper end of the C/K series limited to "1-ton" trucks. Following the exit of GM from the Class 8 truck segment (and the discontinuation of the GMC General, Astro, and Brigadier), the model line was now the largest vehicle produced by the company.