BI-LEV Mode
WARNING: This page is about a different car, the 1995 Oldsmobile Cutlass Supreme. However, it is still accessible from the selected car via links, so may be relevant.
In bi-level mode, controlled air flows through heater and A/C outlets. System is automatically controlled, and adjusts to temperature range selected by driver. System controls fan blower speed and air inlet by interpreting various input signals.