Blower Speed Control
WARNING: This page is about a different car, the 1998 Chevrolet Monte Carlo and 1998 Chevrolet Lumina. However, it is still accessible from the selected car via links, so may be relevant.
Blower speed is controlled by blower speed selector which operates an electrical switch. Four different blower motor speeds can be selected to control amount of airflow through A/C-heater module.