my air conditioning does not blow in the front; it will blow slightly while moving when not in re-circulate mode but very little. The rear A/C works fine. 2007 Chevy suburban

 

are you saying you have airflow but not cold air or no airflow hot or cold?

 

There is an item called the blower motor resister under the right side of the dash. It's about a $16 item and a booger to get to, but I've managed to change mine twice. Now my number 5 fan speed is out so it looks like I will be changing it again soon. It does have a lifetime warranty but where the original lasted 12 years this chinese junk they sell today makes for more work in the long run. I think I will go to the dealer and pay more and hopefully it will be the last one that I install.