I have a 98 GTP w/164,000 miles and I had the exact same thing happen to me. On June 23, 2007 I took it to Pep Boys Service for AC recharge($203), three days later I developed the same problem you have. I just got my car out of the shop on June 29. The compressor was leaking. New compressor installed was ($482) and they claim they were giving me a break since they had just recharged it a week earlier.Problem is fixed and AC is freezing cold.