ACDelco 84143543 Alternator

Perfect fit. No issues.

So glad I found this! Fits like a glove. Been in for a week and works perfectly! Feels like I've gotten some power back. Anywhere from $70 - $150 cheaper than brick and mortar to online shops. Thank you!

2015 3500 DuramaxFit perfect and easy work

AS DESCRIBED IN AD--RECEIVED IN ACDELCO BOX--GREAT PRICE AND FAST DELIVERY--WILL ORDER AGAIN WHEN NEEDED.

fit like a glove on my 2014 silverado

So it turns out, my truck's computer fooled me into thinking I needed an alternator because the voltage meter kept dropping. Silly me didn't realize the computer "alternates" the voltage to the battery regularly, and you don't even notice it unless you're watching it. As long as your gauge doesn't go above or below the warning marks, then you are fine.GLAD I REPLACED IT ANYWAY since my old alternator was 11 years old, and I run a lot of LED nonsense off one battery 👍

This is the OEM alternator for my 2015 Silverado 5.3l and likely many other GM vehicles like it. It is a direct replacement for the original part, and when the original alternator started making some extra noise around 104k miles I decided to change it out for a new one before it crapped out.This alternator arrived in factory packaging. It bolted right on and the connectors hooked up perfectly. It works just as it should and I expect it to go for another 100k.

7 months of use and it's failing . Very disappointed .