Blower Speed Control Switch
WARNING: This page is about a different car, the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
Blower speed control switch operates a 4-speed blower motor. See Figure. Blower motor operates with control knob in any position except Off.