So not sure if this may be a common problem but on my 2008 hummer h3 the blower works fine on all speeds but the air only comes out the defrost vents and only blows hot air on any temperature. The small lights that indicate the ac and other settings also do not light up when the buttons are pressed. Thanks in advance for any help you may be able to give

 

Welcome to HF. Have you had the HVAC recall performed?

Search out H3 the Hummer HVAC resistor fix. There are a couple very good threads here on that, and plenty on the web for the searching.

 

yes the recall has been taken care of. And as for the resistor doesn’t it control the blower motor itself ? My blower motor still functions on all speeds

 

You probably have more than 1 INOP blend door actuator.

As you can see there are 3 on one side,
#7 & #8 Temperature Mode Valve Actuator Assembly - GM (10397365)

There is a 4th for the air recirc (A/C recirc).
Air Conditioning Vacuum Actuator - GM (10397102)