1997 Chevy Lumina Noise

If someone has said it is the bearing, all I can do at this point is to agree. It can make the noise with the A/C on or off, if it is the pulley bearing. It is turning whenever the belt is turning it. One way to rule that it is an accessory noise, is to remove the belt and run it. To replace the compressor, you are first going to have an evacuate and recharge addition that usually is approximately 1.4 hours flat rate. To replace the compressor, for a 3.4L is 2.2 hours flat rate, and for a 3.1L it is 1.1 hours. You may have a recommendation to replace the expansion device(orifice tube) at the same time, which will add some time to the estimate. These times are approximate, and will calculate to the dollars a shop charges per flat rate hour. The times are taken from ALLDATA.

I would be referring to the compressor drive pulley. In some cases it can be replaced seperately, but if you state that performance has been degraded and the compressor may be at fault, you would replace it as an assembly.