Is it right after a cold start and last about 10-15 minutes? If so, it sounds like your idler pulley. Mine started every time the truck sat for a few hours and it sounded like a nest of birds were under the passenger side of the hood. There is a TSB for it. It took four hours in the dealership and no more chirping.
Hope this helps
Shinny
Dealership says the issue is a belt, idler pulley, and tensioner. They admitted that there is a service bulletin out regarding this.....but tell me that I am off warrantee, so it's my dime.
If they won't warranty it change it yourself. That will show them who's boss.
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