270XP High Amp Dual Alternator Kit Package for GMC, Chevrolet, Hummer, Cadillac
270XP High Amp Dual Alternator Kit Package for GMC, Chevrolet, Hummer, Cadillac

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Price: $899.95

Product Code: GMDK-270XP

Color Options

External Regulator

Add to manually set voltage:


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 Nations Starter a& Alternator dual alternator bracket is the perfect solution.

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.

How easy is your dual alternator kit to install?

Here at Nations Startera and Alternator, we believe seeing is believing and that a picture is worth a thousand words. For this reason, we would like you take a look at our step-by-step installation guide with detailed pictures of every single step of the installation process. To view this PDF, please go here.

Why run dual alternators?

What if you had a separate charging system dedicated to the additional accessory load? By running dual alternators you can do just such a thing, and doing so leaves the factory charging system intact doing what it was intended to do, running the vehicle while the secondary alternator carries the additional accessory load. By effectively doubling the available amperage of the vehicle, you can run more accessories with less worry, and all for about the same cost as a single high quality High Output alternator. We are very proud to say, this dual alternator kit is 100% designed and manufactured in the USA! If you're in need of a high output alternator for your truck and are looking for a super reliable way to add a lot of extra power to your truck, Nations Starter and Alternat has the perfect solution for you.

What does your dual alternator kit come with?

270XP Series alternator
Dual alternator mounting bracket
OEM idler pulley for the best serpentine belt life.
Our competitors use alternator bearings which can cause extreme heat and destroy serpentine belts. Gates Green Stripe serpentine belt.
ALL mounting hardware needed to install the bracket and alternator to the vehicle.
An alternator excitation harness to turn on the secondary alternator, and this kit will not cause any check engine codes/c
harging lights Installation instructions

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