<Tr> <Th_colspan="2"> Chronology </Th> </Tr> <Tr> <Th> Predecessor </Th> <Td> Chevrolet / GMC C / K </Td> </Tr> <P> The Chevrolet Silverado, and its mechanically identical cousin, the GMC Sierra, are a series of full - size and heavy - duty pickup trucks manufactured by General Motors and introduced in 1998 as the successor to the long - running Chevrolet C / K line . The Silverado name was taken from a trim level previously used on its predecessor, the Chevrolet C / K pickup truck from 1975 through 1998 . General Motors continues to offer a GMC - badged variant of the Chevrolet full - size pickup under the GMC Sierra name, first used in 1987 for its variant of the GMT400 platform trucks . </P> <P> Although General Motors introduced its first pickup truck in 1930, the term "Silverado" was a designation used only to detail the trim for the Chevrolet C / K pickup trucks, Suburbans, and Tahoes from 1975 through 1999 . GMC used a few variations of the "Sierra" name (e.g. Sierra, Sierra Classic, and High Sierra); however, Chevrolet still uses the CK and the CC in their current model codes . </P>

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