Ac problems

I have a 05 Chevy tahoe. I'm having problems with ac . The ac and heater is on but not coming through when I am moving. My rear unit works fine. An solutions to what is going on? I also can hear the vents opening and closing when I hit the buttons. Have limited control also

I have a 05 Chevy tahoe. I'm having problems with ac . The ac and heater is on but not coming through when I am moving. My rear unit works fine. An solutions to what is going on? I also can hear the vents opening and closing when I hit the buttons. Have limited control also

Auto or regular heater controls?
Any lights flashing?

Does blower motor run and blow air on all speeds?
Or just no blower motor ?
Does it work good sitting still?
Are heater hoses getting hot and is the rad and coolant tank both full of coolant?

Auto or regular heater controls?
Any lights flashing?

Does blower motor run and blow air on all speeds?
Or just no blower motor ?
Does it work good sitting still?
Are heater hoses getting hot and is the rad and coolant tank both full of coolant?

No blower at all

No blower at all
It will not work if it does not blow.:rofl:
Automatic or regular heater controls?
Have you checked fuse or power and ground to blower motor?

It will not work if it does not blow.:rofl:
Automatic or regular heater controls?
Have you checked fuse or power and ground to blower motor?

Don't know how to test it that's why I'm ask for help. Automatic controls

Don't know how to test it that's why I'm ask for help. Automatic controls

A old fashion bulb test light will test fuse and for power to blower motor.
If more problems than that you will need a HAVC capable scanner to test out the automatic heater controls.