belt chirp/squeak
2018 GMC 2500 hd 6.0 60K miles Couple months ago, started getting intermittent chirp from belt/pulleys. Seemed worse in wet weather. Tried trouble shooting. Sprayed water on the serpentine belt and...
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Had a similar chirping happen on our Chevy Vortec 8.1. Cause was diagnosed as the idler pulley which was replaced, problem solved. 8 months later, started chirping again, squealing louder when it rained. This time it turned out that the alternator was the cause. Replaced and all is good now.
