You should remove the supercharger, and the rear supercharger inlet duct and seal, inspect the
Throttle Body bore and the throttle body plate for deposits, and clean the throttle body bore and the throttle plate using a clean shop towel with GM top engine cleaner, P/N 1052626 or AC Delco carburetor tune-up conditioner, P/N X66P, or equivalent product, and install the rear supercharger inlet duct and seal and the supercharger.