Most of the time its the Coupler and its only 36 bucks and can be had from Zommer....GM does not sell parts for the Supercharger,they only sell new ones for over 2 grand.....check out
www.zzperformance.com
under the blower section and here are some instructions for replacing the coupler.....~Larry~
http://www3.sympatico.ca/aepa/blowerinstall.html
http://www.zzperformance.com/zzp/pro...sc_coupler.htm
