Hello all. My truck is a 2001 Nissan Frontier 3.6L V-6, Supercharged, Desert Runner model. For several months now my truck has had a terrible squeal when it started. Assuming it was a belt I had one of the serpentine belts replaced, however this has not fixed my issue. The only major repair I have done to this is replacing the A/C condenser and the hoses for the A/C, however the belt noise did not begin until 4-6 months after that repair. Truck is currently at a shop trying to diagnose what the issue is but they seem as stumped as I am. They "tightened" the belts and that stopped it for one night, but then the next morning it squealed again. I've tried putting belt conditioner on all the belts, starting it without the A/C on, and the sound still persists. Any ideas? Any help at all is appreciated.