Section 18 (HVAC System - Automatic): Operation: Programmer
WARNING: This page is about a different car, the 1996 Buick Park Avenue and 1996 Buick LeSabre. However, it is still accessible from the selected car via links, so may be relevant.
The programmer processes electrical signals from the A/C-heater control panel to operate air intake door actuator, distribution door actuator and blower motor.