This diagram might help you locate the actuator that you need.
The basic description of operation is...
HVAC Air Delivery/Temperature Control Circuit Description
The air delivery is controlled by electronic actuators mounted on the HVAC module. The actuators are controlled by the heater and A/C control. Each actuator responds to voltage inputs on the motor control circuit with precalibrated non-adjustable position settings. The heater and A/C control adjusts the actuators to obtain, condition and discharge the air as requested by the operator of the vehicle. There are three actuators, air inlet, mode and air mix:
* The air inlet actuator controls the outside/recirc door position. There are only two positions of operation for the air inlet actuator. The heater and A/C control commands the air inlet actuator to provide either outside or recirculated air to the inlet of the HVAC module.
* The air mix actuator controls the amount of air that flows around or through the heater core. The heater and A/C control can command the air mix actuator to any one of 21 door positions from full heat to full by-pass.
* The air discharge is controlled by the mode door actuator. The actuator drives a cam wheel that controls the position or the two air discharge doors. The heater and A/C control can command the mode door actuator to any one of 5 positions.