I guess 'classic' means gmt400 platform?
Yes, that's what we're referring to when we say "classic." For a couple years after the introduction of the GMT800 platform you could still order certain trucks as a GMT400 model.
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I guess 'classic' means gmt400 platform?
The 400s "454" is 7.4L. the 8.1 is a 496ci engine, and it didnt come out until 2001, with the introduction of the GMT800 HD trucks.You can get a suburban up to 95-96 with a 8.1