I have checked the coolant level and it is not low. The engine warms to normal temp but there is no interior heat. I have grabbed the heater hoses and they are hot. what is going on. I can have the temp on high and I barely get warm air flow.

 

What year is your truck?
What happens if you hold your RPM's up to around 2000?
Mike

 

2001. Nothing changes at a steady 2000 RPM

 

You may have a failed a/c control head.
Mike

 

Christ, how much is this to replace. The dealer is telling me its a clogged cabin filter but there is lots of air flow this thing is turning into a money pit

 

Look in your owners manual, it should have a discription of the a/c control self test that you can do.
Mike