Passengers side A/C blows ice cold and driver side blows warm

Hello, I am Danny.
The actuator giving you the problem is called the Mode Valve Actuator. It is located on the left side of the HVAC unit under the dash. I have attached a tutorial link showing the basic replacement repair and I have also attached a picture of the Actuator (circled in red). After the install is complete you will need to do a relearn procedure. I have a step-by-step how to do that as well. Hope this helps and feel free to ask any questions if needed. Thanks for using 2CarPros.
Danny-

https://www.2carpros.com/articles/replace-blend-door-motor

Hello again.

It is on the left side of the HVAC unit. Basically it is near the gas pedal and center console on the HVAC unit.
Danny-

Hello,

You have a blend door actuator that is out from the drivers side. Here is a guide that will show you how to fix the problem:

https://www.2carpros.com/articles/replace-blend-door-motor

As far as the fan speed problem, here is a location of the high speed fan relay that may need to be replaced or the speed resistor. Check them out (below)

Please let us know what happens, we are interested to see what it is.

Cheers, Ken

Hello, I'm Danny.

It sounds like you are having an issue with the blend-mode door actuator. It's a small electric motor mounted to the HVAC box that opens and closes a door to direct air throughout the vents. The HVAC box is mounted under the dash on the right side. Here is a tutorial showing what is involved on how to replace the actuator:

https://www.2carpros.com/articles/replace-blend-door-motor

I've attached picture step instructions below on how to replace the actuator on your truck. After installation the actuator has to be calibrated. Those instructions are included as well. Hope this helps and thanks for using 2CarPros.

There are two blend air door actuators. It should be the one on the left.

You should see it looking under the dash on the driver's side.

Try pulling hvac fuse inside truck for 60 seconds with key on sometimes the actuators reset and you'll get warm air again. Otherwise see if actuator is getting power

If it is only the drivers side and you have the split system (passenger and driver each have a temperature control) the issue is most likely the blend door actuator or the controller. Does it switch over rapidly or does it seem to track the time it takes for the engine to warm up?
What you can try to see if it is just a calibration error is to remove the HVAC ECAS fuse wait about thirty seconds. Replace the fuse, start the engine and wait forty five seconds for the actuators to re-calibrate. If this works you have an actuator that is starting to fail but you may be able to limp it along by just pulling the fuse if it goes wonky again.
If this has no effect then the actuator has likely failed completely.
The actuator is on the bottom of the HVAC box and is not difficult to replace. You look up while in the drivers side foot-well and you will see a trim panel that extends from side to side under the dash, it will extend under the center area of the dash as well. Remove the screws that retain it and move it out of the way. The actuator will be easily visible over the top of the area the driveshaft goes under. Remove the HVAC ECAS fuse then remove the wiring connector and the screws, pull the actuator free from the HVAC case. Reverse the process to install the new one. Before installing the trim panel you will want to install the fuse and start the engine to do the calibration process just to be sure the issue is repaired.

You'll have to check to see if your actuators are working right or not. One controls temp and another direction so it sounds as if one is screwed up. Generic pic enclosed.