My wife has a 2002 2.4L cavalier. The A/C is not working at all for her. How can I test the compressor to see if it's gone bad? I was hoping it just needed recharged but I connected a gauge to the low pressure port and it appeared to be full of refrigerant. It looks like the A/C compressor is in a real pain in the a** place in her motor so if it's that then I have a real project ahead of me. Anyway, thanks for any info concerning this!