How do you fit a blend door motor in a vx calais ?

Unlikely, there should be a fuse for the entire system, but for one blend door to not operate correctly, I would think the issue is at that one blend door motor or acctuator.

Did you replace them ? If not working correctly you probably need to replace it. Do you hear a clicking noise behind the dash ? Does your buick have manual or automatic climate control ? You say blend door actuator ? right or left ? Or mode door ? Mode door would be for moving from floor to vent to defrost . Blend door actuator is Temperature Valve Actuator right or left side.
After replacing one , their is a Actuator Recalibration that must be done . One using a professional scan tool or one that doesn't need a scan tool

Calibration Procedure without a Scan Tool
Turn OFF the ignition.
Remove the battery positive voltage circuit fuse of the Instrument Panel Control Module.
Important: The module memory will not clear if the battery positive voltage circuit fuse is installed in less than 60 seconds.
Wait 60 seconds.
Install the fuse.
You probably don't know where the I/P control module fuse is ?
Fuse is located under the rear seat , left side . Fuse # 37 10amp . HVAC (BATT) .

it depends on what model and what options your Journey is equipped with. if it has a dual zone control climate control, it sounds like the blending actuators are not aligning properly or the blend doors are not adjusting to cooperate with the main climate control system. the temp. of the vehicle is controlled by Blend doors in the h/vac system that is thereby controlled by the body control module of the vehicle. the module is a computer that controls all functions within the body of the vehicle. the module should have problem codes that should isolate the area that needs attention.
the body module controls the blend doors in the h/vac system, the doors that open and close in the vents by the heater core that controls the temperature that is ultimately expelled the correct temperature that comes out of the vents. if the settings on both the drivers and passengers control knobs for example are on cold, and one side is hot and one side is cold, then there is a problem at the module level or most likely the blend door is the problem. most likely the actuator ( the motor that runs the blend door and controlled by the module) is not operating properly. your dealer will hook the module up to a diagnostic computer and retrieve the codes ( if any) and isolate which blend door is not working correctly.

usually its just a blend door actuator that needs replacing. to rule out heater core issues, if there is no excessive condensation on the windows and coolant on the carpet, then most like it's a module or blend door issue. if it's a single mode climate control, the same is true but puzzling b/c in that case, both passenger and driver h/vac system is designed to push out a consistent temp for both side without the option of variation on either side. again most likely a blend door issue.

hope this helps

Could be the controller or a faulty blend door.
The blend doors direct air thru the heater core and evaporator along with the vents. The controller uses electric motors to change the direction of air flow.

I have seen this quite a bit. This issue is caused by the blend door for the climate control system. Those doors were not that well constructed and end up breaking to the point where the climate system can no longer operate the door. This can be a very difficult to repair because it requires dash removal to get access to the appropriate door. This condition can easily be verified by a dealer test with scan tool. If you would like to replace yourself I would recommend contacting dealer for a copy of the removal and repalcement procedure for the passengers blend door. I hope this information was helpful.

I would say either blend door issues or a vacuum control valve, heater control valve or a vacuum hose to the heater system is leaking. I would start to suggest. You are correct in checking the blend door. A computer scan should tell you what temp the climate control thinks it is in the passenger compartment. It may be a thermostat problem giving the climate control a false reading. Your blend door is controlled by a servo motor under the dash. You can remove the servo and watch to see if it moves when you change the temp setting from heat to cool. Also, you should be able to manually move the door to the heat position and see if you get heat.

I would repair the problem if I have to disassemble the varioius parts to get at the air doors --- In-Vehicle Temperature Sensor Removal & Installation To Remove:
In-vehicle temperature sensor

1. Remove the climate control head.
2. While pressing the retaining tabs inward, remove the in-car temperature sensor.

To Install:

1. While pressing the retaining tabs inward, install the in-car temperature sensor.
2. Install the climate control head.

---
Air Door Actuators/Motors Removal & Installation Air Inlet Door (Recirculation) Vacuum Motor To Remove:

1. Remove the instrument panel.
2. Remove the air inlet door motor mounting screws. CAUTION
   Do not attempt to bend any part of the air inlet duct door lever.
   
3. Rotate and remove the air inlet door vacuum control motor.

To Install:

1. Rotate and install the air inlet door vacuum control motor.
2. Install and tighten the mounting screws.
3. Install the instrument panel.

Defroster Door Vacuum Motor To Remove:

1. Remove the passenger air bag module from the instrument panel.
2. Disconnect the vacuum line and remove the mounting screws. CAUTION
   Do not attempt to bend any part of the defroster airflow mode door lever.
   
3. Rotate and remove the vacuum control motor from the defrost door lever.

To Install:

1. Rotate and install the vacuum control motor on the defrost door lever.
2. Install and tighten the mounting screws.
3. Connect the vacuum line to the vacuum control motor.
4. Install the passenger's air bag module.

Floor Console Register Duct Vacuum Motor To Remove:

1. Remove the floor console.
2. Remove the right-side instrument panel insulator.
3. Working from the passenger's footwell, disconnect the vacuum hose.
4. Remove the screws and the floor console register duct vacuum control motor. CAUTION
   Do not attempt to bend any part of the floor console register duct door lever.
   
5. Rotate and remove the vacuum control motor from the floor console register duct door.

To Install:

1. Rotate and install the vacuum control motor onto the floor console register duct door.
2. Install and tighten the mounting screws.
3. Connect the vacuum hose to the floor console register duct vacuum control motor.
4. Install the insulator under the dash.
5. Install the floor console.

Panel/Floor (Heater Air Damper) Door Vacuum Motor To Remove:
Panel/floor door vacuum control motor shield

1. Working through the driver footwell, remove the two screws and the shield. CAUTION
   Do not attempt to bend any part of the airflow mode door lever.
   
2. Label and disconnect the two vacuum hoses.
3. Remove the vacuum control motor mounting screws.
4. Lift, rotate and remove the panel/floor (heater air damper) door vacuum control motor from the door lever.

To Install:

1. Install the panel/floor (heater air damper) door vacuum control motor on the door lever.
2. Install and tighten the mounting screws.
3. Connect the vacuum hoses in their original positions.
4. Install the shield on the vacuum motor.

Temperature Blend Door Actuator To Remove:

1. Remove the integrated control panel.
2. Remove the right-side lower instrument panel insulator.
3. Lower the glove compartment.
4. If equipped with Electronic Automatic Temperature Control (EATC), remove the 2 remote climate control module screws and position the module aside.
5. Remove the temperature blend door linkage shield.
6. Disconnect the temperature blend door electrical connector.
7. Remove the temperature blend door actuator mounting screws.
8. Remove the temperature blend door actuator.

To Install:

1. Position the temperature blend door actuator on the plenum.
2. Install the temperature blend door actuator mounting screws.
3. Connect the temperature blend door electrical connector.
4. Install the temperature blend door linkage shield.
5. If equipped with Electronic Automatic Temperature Control (EATC), reposition the remote climate control module and install the 2 mounting screws.
6. Raise the glove compartment.
7. Install the right-side lower instrument panel insulator.
8. Install the integrated control panel.

this unit is eclectric, it uses actuator motors to control the blend doors and selector doors, you are correct its a blend door problem, if you look under the dash on the passengerside there will be a motor mid way, thats the blend door actuator and theres another on the driverside. you what pass/side. move your controls to pin point the right one,hope this helps.

with truck off, move passenger to full hot and driver's to full cold. turn key on and run air for 15 seconds.

turn key off

move climate controls to opposite positions and turn key on again with air on. Run for 15 seconds. turn key off.

center temp controls and turn key on again. this should fix you.
move

This is either an out of phase issue or a temperature control blend door or blend door motor actuator problem, it can also be the climate control module in the dash, 1st try disconnecting the battery for 5 min's to re-sync the climate control module, if this fails u will need to find out what blend door is the problem or if they are ok replace the automatic climate control module in the dash