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2018 GMC Sierra 2500 HD
1
0
Price Match Guarantee
60-Day Returns
Lifetime Replacement
Price Match Guarantee
60-Day Returns
Lifetime Replacement
Guaranteed to Fit2018 GMC Sierra 2500 HD Change Vehicle

AC Delco®
2018 GMC Sierra 2500 HD - Alternator, 8 Cyl., 6.6L Engine - Auxiliary

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$353.49
$400.08Save: $46.59(12%)
Manufacturer #84143543
Guaranteed to Fit2018 GMC Sierra 2500 HD Change Vehicle
Qty:
1

Your Vehicle Fit Details

Vehicle Name
Submodel
Engine
Fitment Information
2018 GMC Sierra 2500 HD
Denali
8 Cyl 6.6L
4-Door, Crew Cab Pickup, 150 Amp and 220 Amp Dual Generator(Khb); 150 Amp-Decoupled Pulley; Labeled 84143543; 150 Amp Gen(Kg4)
2018 GMC Sierra 2500 HD
Base
8 Cyl 6.6L
4-Door, Crew Cab Pickup, 150 Amp and 220 Amp Dual Generator(Khb); 150 Amp-Decoupled Pulley; Labeled 84143543; 150 Amp Gen(Kg4)
2018 GMC Sierra 2500 HD
SLT
8 Cyl 6.6L
4-Door, Extended Cab Pickup, 150 Amp and 220 Amp Dual Generator(Khb); 150 Amp-Decoupled Pulley; Labeled 84143543; 150 Amp Gen(Kg4)
2018 GMC Sierra 2500 HD
SLE
8 Cyl 6.6L
4-Door, Extended Cab Pickup, 150 Amp and 220 Amp Dual Generator(Khb); 150 Amp-Decoupled Pulley; Labeled 84143543; 150 Amp Gen(Kg4)

Highlights

Part:
Alternator
Brand:
AC Delco
Location:
Auxiliary
Condition:
New
Quantity Sold:
Sold individually
Warranty:
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.

Recommended Use:
OE Replacement
Series:
GM Original Equipment Series
Fitnotes:
4-Door, Crew Cab Pickup, 150 Amp and 220 Amp Dual Generator(Khb); 150 Amp-Decoupled Pulley; Labeled 84143543; 150 Amp Gen(Kg4),4-Door, Extended Cab Pickup, 150 Amp and 220 Amp Dual Generator(Khb); 150 Amp-Decoupled Pulley; Labeled 84143543; 150 Amp Gen(Kg4)

Vehicle Fitment Information

Vehicle Name
Submodel
Engine
Fitment Information
2014-2018 Chevrolet Silverado 1500
High Country
8 Cyl 5.3L
L83 Engine, VIN C, Labeled 84143543
2014-2018 Chevrolet Silverado 1500
High Country
8 Cyl 6.2L
L86 Engine, VIN J, Labeled 84143543
2014-2018 Chevrolet Silverado 1500
LT
6 Cyl 4.3L
LV3 Engine, VIN H, Labeled 84143543
2014-2018 Chevrolet Silverado 1500
LT
8 Cyl 5.3L
L83 Engine, VIN C, Labeled 84143543
2014-2018 Chevrolet Silverado 1500
LTZ
8 Cyl 5.3L
L83 Engine, VIN C, Labeled 84143543
Page 1 of 17 | Showing 1 - 5 of 85 results

Product Information

ACDELCO NEW GM ORIGINAL EQUIPMENT ALTERNATORS

Trust ACDelco’s new GM Original Equipment alternators to restore your ride with the precise fit and outstanding quality you can always rely on GM to deliver. Established in 1899, ACDelco manufactures original GM parts and premium OE replacement parts for other brands in the automotive aftermarket.

  • All-new unit made with sturdy, premium-quality materials for solid fitment and ultimate reliability
  • GM original equipment ensures part is engineered to precise requirements
  • Recommended by GM as exact replacement for stock

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

0
What's the difference between this alternator (Part# 84143543) and Part# 84143540?  thanks!Brian D.Mar 06, 2024
Best Answer:Hi Brian, I'm glad to assist you. They differ in the fitment based on the engine type and original labeling. We suggest reaching our Sales Team at 1-866-529-0412 with the VIN and part number of your old alternator for them to check on which is the correct one that fits your vehicle. I hope this helps, and we thank you for inquiring.
Arnel E.STAFFMar 06, 2024
0
What is the amperage of the alternator ?Chris C.Jan 02, 2024
Best Answer:Hi Chris, I'm glad to assist you. This is a 150 amp. If you're interested in this alternator, you can click on the link below for direct ordering to take advantage of our ongoing discount and limited stocks. I hope this helps, and happy shopping. <a href="https://www.carparts.com/alternator/ac-delco/ac84143543?can=CPAE1047_CSQA_20240102" target="_blank">https://www.carparts.com/alternator/ac-delco/ac84143543?can=CPAE1047_CSQA_20240102</a>
Arnel E.STAFFJan 02, 2024
0
Is the alternator the same for L engines and ones that use 87 octane gas?Rick C.Sep 04, 2023
Best Answer:Hi Rick, thank you for reaching out. We are unable to answer your question accurately due to a lack of information. Kindly call our parts team at 1-866-529-0412 and tell us more about your vehicle. Have a nice day.
Aldrin P.STAFFSep 04, 2023

Customer Reviews

Gm Original Equipment Series Alternator, New
OE alternator working great
Carparts packaged the OE alternator very nicely. They shipped it same or next day and mail service delivered quickly. Thanks guys! Now for the reason I bought this to hopefully help someone else. 2017 Silverado had to be jumped every morning and check engine light was on. Dealer said it was a bad battery and replaced. Issue fixed for a week then returned. Returned truck to dealer who had it for an additional 3 weeks and couldn't figure out what was wrong. I drove the truck home from the dealer and noticed the battery gauge fluctuating like crazy on the dash. Combined that with the symptoms of it dying every morning despite being used the previous day and I replaced the alternator which immediately stopped the gauge from fluctuating. Truck has been performing great every since. Dealer informed me the code meant the truck had died and needed to be jumped. I was about to clear the code after replacing the alternator but decided to check what it meant. One of the common issues related to the code was a faulty alternator. Long story short, if you have the time, do your own research and work on your vehicle. I replaced the alternator with original equipment for less than what the dealer charged me to install a new battery.
Jonathan H.
VERIFIED PURCHASER
Purchased on Jul 15, 2021
Gm Original Equipment Series Alternator, New
Perfect fit and arrived quickly, couldn't ask for better
Christopher P.
VERIFIED PURCHASER
Purchased on Jun 24, 2023
Gm Original Equipment Series Alternator, New
Parts came fast and worked great
Works great have not had any problems. Thanks
Garry D.
VERIFIED PURCHASER
Purchased on Jun 09, 2022