I have a 2001 firebird formula (5.7). I recently drove it on a long vacation, driving highway speeds constantly ( over 65). After about 45 minutes of driving the ac fan will almost stop working. Low fan speed can't feel anything, number 2 speed you can barely feel, and by number 4 fan speed it feels how the first one should feel. After being stopped for more than 30 minutes it will work fine. Ac is still blowing cold and the car is not overheating. It also only has 21k miles. Any suggestions?
