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AC Delco®
334-2108 OE Replacement Alternator, Remanufactured

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+ $6.10 Refundable Core Charge

Manufacturer #334-2108
Vehicle Info Required to Guarantee FitAdd Vehicle


Amperage Output:
42 Amp
Pulley Type:
Single V-Belt Pulley
Quantity Sold:
Sold individually
24-months or unlimited mile AC Delco limited warranty
Prop 65 Warning:

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

With Pulley
Recommended Use:
OE Replacement
Replaces OE Number:
Repl. OE No. 12321162, 19135666, and 321161
Clockwise rotation
Professional Series

Vehicle Fitment Information

Vehicle Name
Fitment Information
1959-1963 Cadillac Series 60 Fleetwood
8 Cyl 6.4L
With Alternator
1959-1963 Cadillac Series 75 Fleetwood
8 Cyl 6.4L
With Alternator
1961 Pontiac Tempest
8 Cyl 6.4L
1961 Pontiac Tempest
8 Cyl 6.4L
1962 Buick Electra
8 Cyl 6.6L
Pulley 1V; Fan Ef; Regulator Er; Clock 3:00; Unit Mfr De; Amps 42; Family De-10Dn
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Product Information


Charge your battery with the revamped performance offered by AC Delco’s remanufactured OE replacement alternators. Established in 1899, AC Delco manufactures original GM parts and premium OE replacement parts for other brands in the automotive aftermarket.

  • Each component rigorously evaluated to ensure premium quality
  • Remanufactured according to OE standards
  • All-new regulators and solenoids
  • Equipped with fresh brushes
  • Slip rings designed for maximum electrical contact
  • Rotors and stators sealed with flexible insulating layer
  • Rectifiers thoroughly tested and replaced if needed
  • New bearings lubricated and sealed to withstand vibration and heat
Need help?Call our product expert1-866-529-0412
Chat with us
Mondays - Sundays7am - 11pm ET | 4am - 8pm PT
Warranty Policy
Right parts, guaranteed. If you find any defects, let us know within 60 days and we’ll take care of it. Check out our Warranty Policy for more details.
Shipping Policy
We ship fast so you can get on the road that much faster. Check out our Shipping Policy for more details.
Easy Return Policy
We’re only happy if you’re happy. If you’re not entirely satisfied with your order, you may be entitled to a refund. Check out our Return Policy for more details.

Product Q&A

internally regulated or externally regulated ?A shopperApr 27, 2020
do this alternator have a voitage regulator build in it.  internally?William F.Mar 18, 2021
Best Answer:Hi William, No, it does not have a built-in voltage regulator. It is sold separately.
Grace G.STAFFMar 19, 2021
I have a 63 Chevy with a 327/300hp do you have an alternator oem remanufactufed ? HWHoward W.Jul 21, 2023
Best Answer:Hi Howard, I'm pleased to assist you. Tell us the model of your Chevy so we can check.
Grace G.STAFFJul 21, 2023
is it possible to replace a 42 amp alternator with  a 55 amp on my 1966 cutlass?raymond m.Jun 24, 2021
Best Answer:Hi Raymond, I'm glad to help you out. Yes, you can use the 55 amp alternator to your 1966 Oldsmobile Cutlass. Amperage is basically the amount of electrical current your alternator can supply and will not harm your components and charging system. This part is a 42 amp, let me provide you the link to click for the 55 amp to easily order and take advantage of our ongoing sale and limited stocks. Happy shopping. 55 amp - <a href="https://www.carparts.com/details/Oldsmobile/Cutlass/Quality-Built/Alternator/1966/MPA7122103.html?can=CPGG4850" target="_blank">https://www.carparts.com/details/Oldsmobile/Cutlass/Quality-Built/Alternator/1966/MPA7122103.html?can=CPGG4850</a>
Grace G.STAFFJun 24, 2021

Customer Reviews

Haven’t yet installed but fan color doesn’t match photo (or original) and “delco” marking were a crooked stamp on the casing. Probably will return it
David B.
Purchased on Sep 07, 2020