A/C clutch and coil
 

P/N: 6552422

Brand new, still in the original box (box was opened though). cheapest I found it online was about 54 bucks, so I'll let it go for 40 or best offer. I found an application chart for it on rockauto.com, though I'm not really sure what motors it applies to, I think its mostly V6's.

BUICK (1989 - 2005)
CHEVROLET (1989 - 2003)
GEO (1990 - 1991)
GMC (1993 - 2003)
OLDSMOBILE (1989 - 2004)
PONTIAC (1989 - 2005)