[Planohummer]

the '03 and '04 model trucks have a low-pressure cycle switch with a nasty habit of over-cycling the compressor and causing it to shell. If your switch has a brown band on it it's the old style. Switch is on the line at receiver(aluminum 'jar' pass side firewall). compressor is most likely shot, tensioner most likely has limiting tab cracked off--look for 1/4 " tab that should set a movement limit on the tensioner arm.