1990 Chevrolet Gmt-400 C1500 454SS 2dr Standard Cab SB

1990 Chevrolet C1500 454 SS â?" 454 Big Block, Custom Build Why This Car Is Special The 1990 Chevrolet C1500 occupies a specific and increasingly desirable place in the collector truck market. This was the final full model year of the GMT400's first generation square-body successor â?" the 'OBS,' or Old Body Style, as enthusiasts now call it â?" before the rounded 1988-redesigned platform fully matured into its identity. By 1990, Chevrolet had refined the C/K platform to a point where it offered a genuinely comfortable, well-optioned cab with a powertrain lineup that topped out with the 454 cubic inch big block V8, the same engine family that had powered everything from muscle cars to heavy-duty work trucks since the late 1960s.