Don't know if all GM vehicles do this, but my dad's 496ci from '02 rev matches on upshifts. You shift the gears and without any throttle foot input it'll put the rpms right where it needs them.
Granted it might just be a thing of that motor, all torqued out and stuff. One too long slip shift and it smokes the clutch, takes a few minutes to cool back down so it'll grab again.
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