2000 Tahoe OBS AC Issue

[sphillips]

I have a 2000 Z71 OBS with rear AC. The rear AC blows cold, but the front doesnt, barely cool. So the problem would appear to be some component particular to the front AC system. Air blows well out of the dash outlets, blower motor works on each setting from hi to low. All fuses good, compressor cycles on and off. Any thoughts?

Thanks