ACDelco makes a brand new alternator for $95. They were the OEM for GM.
I went with RockAuto as well, but went with the AC Delco Gold Reman that was wound to have 135 Amp output instead of the OEM standard (~110 I think) I want to say it was around ~$170 with a $45 core deposit. AC Delco is a solid name in parts, and I believe was reman'd in Mexico.
As far as replacements I've had good luck with Rock Auto Sticking to the better brands like Motorcraft, AC Delco, Remy, and Bosch.
On that list, I'd only go with the AC Delco.
Only brand here I am confident with is ACDELCO, Wai I’ve installed due to customer already having the part but I cannot swear to its reliability.
AC Delco makes a good product. Alternator technology is really old, so it's not difficult to do right.
I have the acdelco in my old Comanche and it works great.
Go with an OEM unit by Motorcraft even if it's more expensive. Not somethin you want to do twice, learned this lesson with my Explorer. Threw on an aftermarket unit and it doesn't communicate with Ford's smart charging system correctly so it doesn't provide correct voltages as needed, therefore throwing a charging system warning constantly.
ACDELCO because if I get another API alternator that’s defective I’m going to kill somebody
It's a dice roll. I've had some success with them, but when I put a reman one in my Focus, it only lasted 2 weeks.
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