XDP High Output Alternator (New) XD224

PART# XD224 | SKU XD224
★★★★★ ★★★★★ 4.5 (29 Reviews)

Vehicle Fitment For:
2001-2007 GM 6.6L Duramax LB7/LLY/LBZ

See full application list below
$299.95

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Description

Don't just replace the failing alternator in your 2001-2007 GM 6.6L Duramax, upgrade it with the XDP High Output Alternator (New) XD224. The XDP Direct Replacement Alternators are the perfect option for the Duramax owner that upgraded their truck and wants more than a remanufactured parts store unit. 

Common performance upgrades like plows, on-board air systems, horn kits, and lighting upgrades can max out the capabilities of your charging system. The XD224 is designed to increase reliability and output of your charging system to alleviate the strain of aftermarket upgrades. With a 220 Amp output, this alternator almost doubles the factory output. This gives you the ability to get the most out of your charging system whether you're out plowing snow, or at an event showing off stereo system upgrades.  

The XDP High Output Alternator (New) XD224 is a direct bolt-on replacement and requires no modifications for installation. Each alternator comes pre-tested and is ready for installation. 

Features: 
  • 220 Amp 
  • Bolt-On Upgrade
  • 100% Brand New, No Core!
XD224 Specifications: 
  • Amp: 220
  • Voltage: 12V 
  • Rotation: Clockwise
  • Pulley Class: S6, 6-Groove Pulley
  • Internal Regulator 
  • Internal Fan 
  • Polarity: Negative
Note:
If used in a dual alternator application, the output wire must be upgraded. 
Pulley color may change change due to availability.

Manufacturer Warranty*:
2 Year / Unlimited Mileage

Reviews For XDP XD224

Overall Rating
4.5/5
29 Reviews
Rating Snapshot
Verified Buyer
★★★★★ ★★★★★
Receipt of damaged “new” alternator
Dave (Escondido, CA) | June 12th, 2026
Hello, I received my package on Friday, 5 June 2026 from XDP containing my XD 224 alternator. Upon opening the box, I observed damage to the item and took pictures and immediately contacted customer service via text; however never heard back, and it’s been one week. The main damage was to one of the mounting ears on the alternator. The damage to the mounting ear looks like someone may have attempted to install this new alternator previously and used a hammer or pry bar to install the alternator. The remainder of the damage was confined to scratches and marks to the alternator case. I paid for a new alternator and I am hoping that I was not sent an alternator that was previously used or returned as an exchange item. Also, the box which contained the alternator was at least 4 times larger than the alternator itself. Only a few pieces of crumpled paper were included inside the box for packing material,, which is insufficient to protect the alternator from shipping damage, particularly if shipping from NJ to California, as was the case for my shipment. Given that the alternator was not adequately protected for shipping, I am hoping there is no internal damage to the alternator itself, or its main shaft and pulley but won’t know until it is installed. I realize that I have the option to return the alternator and exchange for another one, but I need my truck to be operational immediately, and I've already been without transportation for a week now while waiting on the new alternator to arrive. Therefore, I plan to install the new alternator this weekend. However, I wanted to go on record to let you know the above and also ask if XDP is interested in offering any compensation.
Note From Store Owner: Thank you for taking the time to share your experience. We're very sorry to hear that your order arrived damaged—this is certainly not the condition we want our products to arrive in. We take feedback like this seriously and are reviewing your comments internally so we can improve. We understand how frustrating this is and would appreciate the opportunity to make this right. We have notified the proper departments of your issue so that they can reach out, but please don’t hesitate to reach out to our Customer Service Team using the help desk feature on our website.
Verified Buyer
★★★★★ ★★★★★
Saved the day!
Dan (Las Vegas) | March 27th, 2026
My original 2006 alternator died and killed my batteries while I was out of the country. When I got back, I knew I wanted a more powerful replacement as I have some aftermarket electrical equipment on my truck. This was super easy to swap in and runs perfectly smoothly. Super happy with it and the experience ordering through this company.
Verified Buyer
★★★★★ ★★★★★
2006 LBZ Duramax
Mike (Arkansas) | February 8th, 2026
Arrivrd on time but the plastic electrical connector was broken. At least it still had the locking tab, so I installed it. Was a tight fit in the bracket but ir works. Will see how long it lasts.
Note From Store Owner: Thank you for taking the time to share your experience. We’re very sorry to hear that your order arrived damaged, this is certainly not the condition we want our products to arrive in. We understand how frustrating this can be and would appreciate the opportunity to make things right. Please don’t hesitate to reach out to our Customer Service Team using the help desk feature on our website.
Verified Buyer
★★★★★ ★★★★★
XDP 220A Alternator
JAE (Northeast) | January 29th, 2026
OEM 145A alternator finally gave up after 20 years of continuous service. SO I figured I'd try out this 220A alternator. Easy replacement. So far, so good. Less than a month of usage in brutal cold winters here in the northeast. Seems to be charging well. I hope it lasts as long as OEM AC DELCO did.
 
★★★★★ ★★★★★
Less than 6 months out of warranty
Don B. (Montana) | October 27th, 2025
Great alternator until the warranty is up, didn't even last 6 months after that...
Note From Store Owner: Thank you for reaching out to us. We understand how disappointing it can be when a product experiences issues. We still want to help however we can. If there's anything we can do to make things right, please don’t hesitate to reach out to our Customer Service Team using the help desk feature on our website.
Verified Buyer
★★★★★ ★★★★★
Great product, poor packaging
T. Hart (California) | October 27th, 2025
Ordered this to replace my stock alternator that went out. Had to shave the mount point on one side because it would not fit, but not a big deal. Once it was in there, it worked perfectly. My only complaint is the packaging. The alternator was just placed in a box with some paper around it, so the alternator rolled around. The plastic cover on the back was broken on one side when I opened it up. Didn’t affect the function so I didn’t want to send it back and wait for a different one. That’s my only complaint. Otherwise would have given 5 stars.
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Frequently Asked Questions

Is this a smaller pulley size than stock? Would I need a shorter belt?
No. The XDP High Output 220 Amp Alternator XD224 is a bolt-on replacement and requires no modifications for installation.
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Specifications For XDP XD224

MPN XD224
SKU XD224
GTIN 856217008038
ID 32538
Manufacturer Name XDP
Shipping Weight 18.00 lb.
Shipping Length 13 in.
Shipping Width 11 in.
Shipping Height 11 in.
Fuel Type Diesel
Configuration Single
Position Primary (Top)
Manufacturer Warranty* 2 Year / Unlimited Mileage
Prop 65 Prop 65 WarningWARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov
Cross Reference # AL8515X, 3342491A, 88864281, 3342481A, 88864277, 3212123, 3211813, 19244746, 3351086, 88877296, 3351092, 88877302
Internal L0R12

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