GMDDK Diesel Dual Alternator Kit for All GM Duramax 6.6L Diesel Trucks with 300XP Alternator
GMDDK Diesel Dual Alternator Kit for All GM Duramax 6.6L Diesel Trucks with 300SPX Alternator
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Base Price: $1,089.95

Price with Selected Options: $1,089.95

Product Code: GMDDK-300XP

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External Regulator

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If you are charging Lithium Batteries, choosing an external regulator is required.


2001 - 2020 GM 6.6L Diesel Trucks Dual Alternator Kit with 300XP Alternator

When you need more output than the factory alternator or a single High Output Alternator can handle, or want the safety and security of a secondary alternator, a GM dual alternator bracket is the perfect solution. This kit fits GM Trucks such as Silverados, Sierras, and Chevy 2500's with 6.6L Diesel Engines.

Unlike other GM Dual Alternator bracket kits on the market that are cheaply made and poorly designed, our Dual Alternator brackets are precision CNC waterjet cut from solid 3/8" STEEL plate. Then we coat them with a super durable powdercoat finish so they stay looking and working great! With our dual alternator kit, the mounting plate is securely fashioned to the engine with 4, 10MM grade 12.9 bolts which makes installation very simple and secure.

What does this kit come with?

  • It includes the dual alternator mounting plate, all grade 12.9 mounting hardware, idler pulley, and a brand new high quality Gates belt.
  • 300 Amp High Output Alternator

This kit is designed to use the popular GM dual spool mounting, and you can use either a second factory output alternator, or one of our highly dependable, High Output AD series alternators.

Average Customer Review: Average Customer Review: 5 of 5 5 of 5 Total Reviews: 1 Write a review.

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  0 of 0 people found the following review helpful:
5 of 5 Amazing service July 13, 2021
Reviewer: Ivan Malone from Lakeland, FL United States  
In a world where everything is out of stock or on back order these guys came through for me. From phone call order to the day it showed up was very impressive.

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