Should there be lots of play and clicking noise on a 1998 Pontiac Grand Prix GTP supercharger pulley when spinning it back forth the belts are off?
No, there should be very little to no play or clicking noise on a 1998 Pontiac Grand Prix GTP supercharger pulley when spinning it by hand with the belts off. Some very slight resistance from bearing friction is normal, but any significant play or clicking indicates a problem with the pulley bearings. This needs attention as a failing bearing could lead to supercharger failure.