rear AC not working

The rear ac will not come on the front works fine after i had it recharged but the rear acts like it has no power is there a seperate fuse i should check oh yea its a 2000 tahoe LT

ok found the fuse was blown so i replaced it and checked the voltage and only had voltage when it was set on high not low or med. so i plugged the fan back in and it will run on high but thats it

There is a blower resistor for the rear unit-mounted in the rear unit HVAC case- most likely it needs replaced- test it first.

Note: you need to remove the wheel well cover to access rear HVAC case.