i would assume the grand prix would have a better suspension because it is developed as more of a sport car with a sport suspension. is your alero an FE2 or FE3 suspension? the grand prix has a lower center of gravity, thicker sway bars, and stiffer bushings than the alero.
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2000 Chevrolet Malibu LS
2000 Oldsmobile Alero GL (sold)
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