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FREE 30-day refund/replacement
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Availability:
In Stock.
Arrives
Nov 10 – Nov 11
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Features
- 100% newly manufactured as an exact replacement for your GM vehicle's original alternator
- Components are tested to meet original specification requirements for remarkable durability
- GM-recommended replacement part for your GM vehicle's original factory component
- Offering the quality, reliability, and durability of GM OE
- Manufactured to GM OE specifications for fit, form, and function
- Manufactured to meet or exceed strict quality requirements
Description
ACDelco GM Original Equipment Light Duty Alternators have components that are newly manufactured, and are GM-recommended replacement for your vehicle's original alternator. Alternators provide power to the vehicle's electrical systems and charge the battery
Manufacturer: ACDelco
Brand: GM Genuine Parts
Model: 84143540
Item Weight: 16.42 pounds
Product Dimensions: 9.99 x 9.99 x 9.99 inches
Item model number: 84143540
Manufacturer Part Number: 84143540
OEM Part Number: 84143540
Date First Available: January 16, 2018
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Nov 10 – Nov 11
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
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Top Amazon Reviews
Auto parts stores wanted twice the $ for alternator for my Burb, reman in most cases. This one is NEW and OEM, great value! Installed with new belt in about 20 minutes.
Reviewed in the United States on August 24, 2025 by Peter
Part was A great Fit and easy Install Works Perfect Also Found out On GM Vehicles Have to use only A/C Delco parts Would Definitely Buy Again
Reviewed in the United States on April 21, 2025 by Hoss
Alternator fir my 18 Silverado perfectly. Will definitely order again. GM product for the win
Reviewed in the United States on October 8, 2025 by Lawrence Bush Lawrence Bush
After searching around local places for a 170 coupling alternator for my truck and nearly accepting the fact that I had to put forth the money for one, big brother popped up on Google and showed me this one! I'm very happy that it showed up because it's identical to the napa ones that are remanned, but this is brand new and much better on the cost side of things. I installed this in about 1.5 hours with minimal tools, it was very simple to do in my 14' silverado 1500. It was also 20 amps bigger than the stock one that died. I've been extremely happy with this, between pulling campers, 4 wheelers, trailers etc. I've never had a loss of power. This has been installed in my truck for about 4 months now and I have no complaints - it has held up awesome.
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Reviewed in the United States on September 20, 2024 by Trainor1213
Waited 3 weeks before writing this review. Very pleased with the GM Genuine Parts 84143540 Alternator purchase. My truck was having issues with the audio not working sometimes and at low speeds the power steering being difficult. One morning when the truck wouldn't start, I pulled the battery and had it tested. Battery was fine so after they charged it, I brought the truck in to test the alternator and discovered it was outputting too much. Guessing the regulator inside the alternator had failed. My brother-in-law recommended getting the 170 amp version and sent me a link to this one. Installing the new alternator took about an hour and afterwards I was shocked at how much better the truck performed. It has more pep, responsiveness, and the intermittent audio issues went away. I 100% recommend this part and seller!!
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Reviewed in the United States on October 9, 2025 by TB
Installed this alternator 3 months ago and I have had zero issues. My truck runs great and the part was easy to install with a quick YouTube search. The value was great compared to the local auto part retailers.
Reviewed in the United States on May 29, 2025 by Braden lane
2017 GMC Yukon XL Denali 2WD 6.2L engine. 1. I was worried that the alternator would arrive rolling around in a box....Not the case. Excellent foam packaging around the entire alternator. 2. See pics below. The alternator pics with the shinny copper windings is the alternator I removed. The alternator with the blackened windings is the new one. Did not say rebuilt in the ad, but everything else looks new on it. 3. I put in a new battery a few days before installing the alternator. After motor is off for a few hours to let everything cool down, I read 12.7VDC across the battery (engine not running). 4. Start the motor, and turned on all accessories and lights, and read 13.8-14.7VDC across the battery (good). About one week after installing the new alternator, I see the meter is not at 14VDC, and put a meter on the battery and it reads 11.7 - 12.3VDC. After ten minutes it comes back up to 14VDC for a few minutes and then drops back down. So, I am not 100% certain this alternator is doing what is should be doing. Obviously I have rechecked all connections after testing, and retested with the same results. So, my review title of Verdict is Still Out is where I am currently at. I will check it out again tonight to see what readings I get. Thank you. Go Navy.
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Reviewed in the United States on August 5, 2025 by James Caras James Caras
Fits and worked perfectly on my 2016 Silverado 1500 LT. Plus, a lot cheaper than my local auto stores.
Reviewed in the United States on March 27, 2025 by Miguel Esparza