Mode Selector Buttons
WARNING: This page is about a different car, the 2001 Pontiac Bonneville and 2000 Pontiac Bonneville. However, it is still accessible from the selected car via links, so may be relevant.
The A/C-heater control panel includes a series of 8 buttons to select system operating modes. A/C-heater control panel has the following modes and functions: A/C, bi-level, panel (vent), heater, defog, defrost, rear defogger and air recirculation.