Alternator replacement

Here are a couple guides that will not only help with replacing but testing the alternator:

https://www.2carpros.com/articles/how-to-check-a-car-alternator

https://www.2carpros.com/articles/how-to-replace-an-alternator

Also, below is the info from the manual that will give the detail needed on this vehicle to replace this.

However, this is not that detailed so here is a video that may give some good info. Clearly this is on a truck but it is also a GM V8 so it is going to be close.

Let us know if you have more questions.

Thanks