Problem Description and Possible Solution
The alternator may fail causing the battery to go dead, or an abnormal noise may develop. The dash warning light may or may not illuminate. A failed alternator will require replacement.
Average mileage: 126,669 (58,500–236,000)
Engines affected: 4.3L V6, 5.0L V8, 5.7L V8, Gasoline
25 people reported this problem
I had a terrible noise when I first started my truck, then it seemed to fade away. Came back again within a drive or two. Dropped it off for other service and they told me it needed a rebuilt alternator, since the bearings were gone in mine. In my mind, a vehicle of this age is bound to have things like this come up. I feel like I have an excellent service garage taking care of my vehicles now, so, I'm just reporting, not complaining. My battery is fine! Dec 12, 2014
If I remember correctly,the first time was at 220,000 miles and then I had new brushes put in the alternator. That lasted maybe 50,000 and it went down again. Then I swapped the original alternator for a new delco at Autozone with warranty.I think this was the last time I replaced it and now I have over 250,000 miles on this alternator and still working good.