Reviews of AC DELCO alternator

Personally the AcDelco would be my top choice here with these options going new and not a reman.

If those are your only options you're gonna go with, Remy or ACDELCO. Keep in mind the ACDELCO is not made by ACDELCO and is just rebranded. But has a warranty and decent support.

ACDELCO because if I get another API alternator that’s defective I’m going to kill somebody

I always get AC Delco from RockAuto... never had one bad out of the box... Can't really speak to any other brands.

I\u2019ve had an ac delco alternator from rock auto in my Honda Fit for 7 years now.

On rock auto I see new alternators from ac delco. Not sure about any of those brands.

Put an AC Delco alternator on my Celica because I couldn't get a Denso for it. Wasn't going to buy a store brand reman that'll die in 6 months.

If it was me, I’d go with the ACDelco. Never had any issues with them so far. Checking for the best warranty is something else you might consider, just make sure to read that fine print closely.

The issue you can run into is most common vehicle alternators are light duty at best. Lets say its a 100 amp alt, don't pull more than 40 amps continuous. A great example is the AC Delco 10si alternator. Loads of cheap knock offs and copies of that alternator all claiming crazy high amperage but none list the duty cycle. The 10si frame is designed for 40 amps of power and the heat that creates. You might be able to get a little more cooling with a better fan but you won't get 100+ amps out of one.

Always buy ac delco OEM alternators not part store crap.