Mode Door
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 position of this door determines how much air will be diverted to the floor outlets. An electric air temperature actuator controls the position of the door. The electric air temperature actuator is located right of accelerator pedal, on heater case. See Fig 1 . The actuator is controlled by the A/C-heater programmer.