ok based on those codes it would tipicaly have a mode door/mode motor problem.here is some info on the circuits of that motor. MODE DOOR ACTUATOR (ATC)
The mode door actuator is located on the lower left side of the A/C- Heater housing. This actuator controls the position of the panel/bi-level door and the floor defrost door.
Power for the mode door actuator is supplied on circuit C26 from the Body Control Module (BCM) This is a 5 volt feed.
Circuit C35 is the mode drive circuit from the BCM. to the actuator.
The C37 circuit is the feedback from the actuator to the BCM. The BCM uses this information to adjust the door to the proper position.
Circuit C57 is the sensor return to the BCM. This circuit is spliced with the other actuators in the housing.
Circuit C34 is the common line that is spliced, and connects, to the other sensors in the housing.
here is info to replace. The mode door actuator is an electric motor. It mechanically positions the A/C unit panel/bi-level door and the floor/defrost door. This actuator contains a feedback strip which allows the computer control to know the exact position of the mode door at all times. The mode door actuator is not serviceable and must be replaced if found to be defective.
The mode door actuator is located on the lower left side of the heater housing Mode Door Actuator Location
REMOVAL
1. Remove left and right underpanel silencer/ducts.
2. Remove floor console.
3. Remove center floor heat adaptor duct.
4. Remove rear seat heat forward adaptor duct.
5. Loosen center support bracket and pry rearward to gain access to the actuator.
6. Remove actuator retaining screws. Then pull actuator straight down. Upon removal, note the shaft position of the actuator, because the shaft on this motor is keyed. When installing new actuator, its shaft must be positioned in the same location.
7. Remove electrical connection on actuator. the connector pin out goes like this, pin 1 is c35 dark green and yellow, pin 2 isc34 dark blue and white, pin 3 is c26 pink and dark blue, pin 4 is c57 gray and tan, pin 5 is red c37. ok so basicly pins 1,2,3 control the motor with the 5 volt on pin 3 and 1,2 swithcing ground to change motor direction. tipicaly what i would do in the shop setting is remove the connector (maybe the motor too,i cant remember specificly) and plug a new motor to it and see if it moves(a benifit of having a parts department)then I would also try and move the door shaft by hand to make sure it moves(you can go key on and run the fan to make sure the mode has changed).just a note,I have had some where i have taken off the motor and it moves but is not strong enough to move the door. if you dont have any motor control(you can use a dvom to test for voltage and ground)it may be wiring or the body control module(since you replaced the control head).good luck and let me know if you need more info/help.