Hello. The squealing nose is probably caused by a slipping drive belt. That could be due to the belt being old and having stretched over time to a point where the tension pulley just can't compensate any more or it could be that the tension pulley itself is failing. To diagnose the problem, start with checking the belt itself. All you have to do is take a look at the ribbed side of the belt. If there are a bunch of cracks or other damage, then replace it. Here's our general guide:
https://www.2carpros.com/articles/how-a-serpentine-belt-works
And here's our general guide on actually replacing a serpentine belt:
https://www.2carpros.com/articles/replace-serpentine-belt
As for specifics to your truck, there are 2 v8 engines available for it. The 4.7L v8 and the 5.9L v8. I'll dig up AllDatas information on both engines so you can see where the tensioner is in a separate post shortly. Here is the information for the 3.7 and 4.7L engines.
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Thursday, April 22nd, 2021 AT 5:00 AM