I checked the codes in Connie's truck and it's a 105 amp alternator. I took a look at the serpentine belt that it is in there now, and it looks fine to me. No cracks or anything looking like the belt is passed it's prime. Looks like it will be a pain in the butt to change out, too. I think the air intake will have to come off to get to the tensioner. So maybe I don't need to be in any hurry to change out that belt.