AC blower does not working properly

Hello, I am Danny.

Sounds like you are having trouble with your blower motor resistor. I am attaching two pictures of its location. You must remove the cover panel under the glove box to gain access. GM has had a few issues with the resistor connection melting. I have circled the resistor in red. Be sure to check the connection well for melting/burnt/poor connection.

This guide can help as well

https://www.2carpros.com/articles/blower-fan-motor-works-on-high-speed-only

I have done quite a few GM's! Hope this helps and feel free to ask any other questions if needed. Check out the diagrams (Below). Please let us know what happens.

Welcome to 2CarPros.

First, did you have to remove the fan from the original motor and reinstall it on the new motor? If so, are you sure you sure it wasn't installed backwards which would cause the fan to draw air from the passenger compartment?

Here are the directions specific to replacement of the motor for your vehicle. Read through them to confirm nothing was done incorrectly.

_______________________________________

BLOWER MOTOR AND FAN REPLACEMENT
BLOWER MOTOR AND FAN REPLACEMENT

REMOVAL PROCEDURE

The blower motor and fan are located in the lower right hand corner of the HVAC module. Service this component as an assembly only.

Picture 1

1. Remove the right side instrument panel (IP) insulator.
2. Move the Body Control Module (BCM) aside. Refer to Body Control Module Replacement in Body Control System.
3. Disconnect the blower motor electrical connector.

Picture 2

4. Remove the blower motor retaining screws.
5. Remove the blower motor and fan assembly.

INSTALLATION PROCEDURE

picture 3

1. Install the blower motor and fan assembly.

NOTE: Refer to Fastener Notice in Service Precautions.

2. Install the retaining screws.

Tighten
Tighten the screws to 5 N.M (44 lb in).

Picture 4

3. Connect the blower motor electrical connector.
4. Install the BCM into position.
5. Install the right side IP insulator.

__________________________________________

Let me know what you find or if you have other questions.

Joe

Welcome back:

Is the air coming out anywhere?

Something is blocked or maybe even the fan isn't spinning fast enough. Maybe it's loose on the shaft. Honestly, if it's turning and nothing is blocked, there is no other explanation. Have you removed the motor to recheck?

Welcome back:

I wish I had a better answer, but there really shouldn't be anything blocking air flow. If all actuators are working, I'm stumped. It's can be difficult to diagnose when I don't have the car in front of me.

If you could, would you consider letting me know what is found? I would love to know because it isn't making sense to me.

Take care,
Joe

If the blower motor doesn't work, check blower motor connector for voltage and ground. Purple wire is voltage, black is ground. Also, check applicable fuses, hvac fuse and hi blower fuse. Use a voltage tester.

There is more than one fuse, did you use a voltage tester on the fuse circuits? Even if the fuse is good, if there is no voltage, the circuit is dead.

The blower motor should be under the passenger side dash. You will probably have to remove, at least, lower part of dash. You will have to use your own initiative as far as removal of dash part. I don't have a procedure for that.

There is a blower relay, under hood fuse box. Pull the relay and use jumper wire between terminal 87 and terminal 30. If fan runs, the motor and ground should be ok and the problem is elsewhere.

Are you handy working around a car?

Sounds like you need a blower resistor, it is located on the passenger side under the dash by the blower motor

Are all the settings working

Sounds like a blower resistor to me