How to change rear climate control blower in a 2013 acadia

Blower motor control processor is probably the problem . Manual or automatic climate control system ? Doesn't work in any speed ?
https://www.youtube.com/watch?v=8NXjUlDwZs0&t=619s

There is a part called a air temperature control blend door in the ducting of the system and the door is operated by a tiny DC motor, if the passenger side will not change temperature at all then this little motor may be defective or the door is warped and sticking from heat.

Air Circulation
When the heated/cool seat switch is pressed to initiate operation of the climate control seat (CCS) system, cabin air is drawn through the heated/cool ventilation module air filter, then directed through passages in the foam of the seat cushion and seat back to the seat's occupant. In order for the CCS system to operate to its optimum performance, it is crucial to have unrestricted air flow through the system. A dirty or restricted air filter, the blockage of an exhaust air duct, a misaligned heated/cool ventilation module, or incorrect foam installation of the seat cushion or seat back will all have negative effects on CCS operation.
Heated/Cool Ventilation Module
Each heated/cool seat has 2 ventilation modules, one located under the seat cushion and one located in the seat back. These modules are controlled by the climate control seat module (CCSM). Each ventilation module contains a thermo-electric device (TED), a temperature sensor, and a blower motor. The TED and temperature sensor are mounted downstream of the blower motor. Each TED consists of a circuit of positive and negative connections sandwiched between 2 ceramic plates. Each ceramic plate is equipped with copper fins for heat exchange. The air flowing past these fins is either directed as conditioned air into the seat cushion and seat back, or directed into the cabin as waste air.
A TED is essentially a solid state heat pump that is used to heat or cool the air supply to the seat cushion and seat back. When voltage is applied to a TED, one side releases energy as heat, while the opposite side absorbs energy and gets cold. When the polarity of the current flow to the TEDs is switched, the hot and cool sides of the TED reverse.
During the following climate control seat system description and operation, the TEDs, blower motors, and temperature sensors will be referenced independently even though they are all packaged together as a module.
Climate Control Seat (CCS) System
The CCS system consists of two heated/cool ventilation modules and one climate control seat module (CCSM) that controls both the driver and passenger heated/cool seats systems. The CCSM is mounted below the front passenger seat cushion. It receives power from both, battery positive voltage and ignition 3 voltage.
Once a CCS system is activated, cabin air is drawn through the seat blower motors and directed across the fins of each of the thermo-electric device (TED) located under the seat cushion and in the seat back. The air is either heated or cooled as it passes over the TEDs. This conditioned air is then directed through channels in the foam of the seat pad and through small holes in the seat cover to the occupant. Once the system is activated, the CCSM uses a set of algorithms to control the temperature of the selected heating or cooling modes.
Your best bet is to take your vehicle to a qualified repair shop an have it diagnosed .
DTC B19A4: Driver Seat Back Blower Speed Circuit High

DTC B19A8: Driver Seat Back Blower Speed Circuit Short to Ground

DTC B103D: Driver Blower Power Circuit

DTC B272E: Driver Seat Back Blower Circuit Open
DTC B19A3: Driver Seat Cushion Blower Speed Circuit High

DTC B19A7: Driver Seat Cushion Blower Speed Circuit Short to Ground

DTC B2729: Driver Seat Cushion Over Temperature
DTC B19A2: Passenger Seat Back Blower Speed Circuit High

DTC B19A6: Passenger Seat Back Blower Speed Circuit Short to Ground

DTC B111D: Passenger Blower Power Circuit

DTC B272F: Passenger Seat Back Blower Circuit Open
DTC B19A1: Passenger Seat Cushion Blower Speed Circuit High

DTC B19A5: Passenger Seat Cushion Blower Speed Circuit Short to Ground

DTC B272A: Passenger Seat Cushion Over Temperature
Driver and Passenger Heated/Cool Seats Inoperative

1. Ignition OFF, disconnect the C1 harness connector at the CCSM.
2. Test for less than 5 ohms between the ground circuit terminal M and ground.
?‡'
If greater than the specified range, test the ground circuit for an open/high resistance.

3. Verify that a test lamp illuminates between the B+ circuit terminal E and ground.
?‡'
If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

4. Disconnect the C2 harness connector at the CCSM.
5. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 1 and ground.
?‡'
If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.

6. If all circuits test normal, replace the CCSM.

Sorry

Is your heater blower motor working on all speeds ? Are you get any air coming from the rear vents ?

I have a 2000 pontiac grand prix with a digital climate control system. The heat quit working, it doesn't blow out any heat. Now that it is warm outside the air stopped blowing out any air. The digital temperature on the climate control is not correct. When it states that it is below 30 degrees on the ext and it is warm outside the air wont be cold. Once it starts going above 30 degrees the air gets colder. Today the blower stop working all together. Was told it maybe the climate control unit was bad. You can hear the door opening/shutting when you switch the temp from cold to hot. But there was no heat blowing out whatsoever in the winter time. Could you please give me your opinion on whether or not it is the climate control unit or something else?

Heater Core Removal & Installation Front To Remove:

1. Make sure you have the anti-theft codes for the audio and the navigation system, and then write down the audio presets.
2. Disconnect the negative cable from the battery.
3. From under the hood, disconnect the heater valve cable from the heater valve. Turn the heater valve arm to the fully opened position.
4. When the engine is cool, drain the engine coolant from the radiator.
5. Disconnect the inlet heater hose and the outlet heater hose from the heater core.
6. Remove the mounting nut from the heater unit. Take care not to damage or bend the fuel lines, the brake lines, and related parts.
7. Remove the dashboard.
8. Remove the evaporator.
9. Remove the mounting bolts and remove the heater unit. Front heater unit
   
   
10. Remove the self-tapping screws and the clamp.
11. Carefully pull out the heater core so you don't bend the inlet and outlet pipes.

Front heater core

To Install:

1. Using care, install the heater core to the heater unit and secure.
2. Using care, install the heater unit and tighten mounting nuts and bolts to 7 ft-lb (10 Nm).
3. Install the evaporator.
4. Install the dashboard.
5. Connect the inlet heater hose and the outlet heater hose to the heater core.
6. Connect the heater valve cable to the heater valve.
7. Refill the cooling system with engine coolant.
8. Adjust the heater valve cable.
9. Make sure that there is no coolant leakage.
10. Make sure that there is no air leakage.
11. Connect the negative battery cable.
12. Perform the power window control unit resetting procedure.
13. Enter the anti-theft codes for the audio and the navigation system, and then enter the audio presets.

Rear To Remove:
NOTE: The rear blower motor, the rear heater core, the blower screen, the rear blower resistor (heating/air conditioning system) and the rear power transistor (climate control system), the rear air mix control motor (climate control system) , the rear mode control motor and the rear expansion valve can be replaced without removing the rear heater-A/C unit.

1. Remove the self-tapping screws and the clamp, and then remove the bolts and the rear evaporator lines with the rear expansion valve. If necessary, remove the rear expansion valve. Use a second wrench to hold the other fitting on the valve so the rear evaporator lines won't twist. Leave the first fitting loosely connected so you can use it to hold the valve while you loosen the second fitting.
2. Remove the rear heater hoses.
3. If necessary, remove the rear blower motor, the rear heater core, the blower screen, the rear blower resistor (heating/air conditioning system), the rear power transistor (climate control system), the rear air mix control motor and the rear mode control motor.
4. Remove the self-tapping screws and the lower housing.
5. Remove the self-tapping screws, and carefully separate the left upper housing from the right upper housing. Remove the rear heater core.

Rear evaporator assembly

To Install:

1. Replace the rear heater core.
2. Attach the heater hoses.
3. Make sure no air is leaking from the left upper housing and the right upper housing fitting and from the upper housings and the lower housing fitting.
4. Before reassembly, make sure that the rear air mix control linkage and door move smoothly without binding.
5. Before reassembly, make sure that the rear mode control linkage and door move smoothly without binding.
6. Reassemble the housing.
7. After reassembly, make sure the rear air mix control motor runs smoothly.
8. After reassembly, make sure the rear mode control motor runs smoothly.
9. Refill the cooling system and make sure that there is no coolant leakage.

If you have manual air conditioning replace the high blower relay
If automatic climate control Air replace the blower module

Check voltage to all three parts: the blower motor, the blower resistor which is directly connected between the motor and the the switch, or also it could be the switch (remember secure you ground the negative side of the voltmeter to either the battery or to the ground car).

Generally the auxiliary climate control system has dual controls for the driver and rear passengers consisting of temperature/air distribution and blower speed; the rear auxiliary climate control assembly is mounted in a separate overhead console positioned on the headliner above the second row seating area.

Also, with the Owners Manual, you can check the relays substuting it in each position in the fuse panel.

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this fan is controlled by a fan relay, located under the dash. Most likely replacing that relay will solve your problem. Go to any autozone store, but the part and ask them to assist you in changing it. they offer this assistance as a free service.

are you saying u can't change the air temperature? do the blower speeds work ok? can u change the locations the air comes from, i.e. dash registers, defrost, floor?