What amperage of alternator do I need?

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Apr 28, 2011 | 12:24 PM

jrhodeho

Thread Starter

Junior Member

Joined: Apr 2011

Posts: 2

What amperage of alternator do I need?

Hello,
I am new to this forum. I just bought a 2000 GMC Sierra 2500 HD 2wd and I need to replace the alternator. My question is what amperage do I need to get. Autozone lists 105A and 130A alternators for this truck. Any help would be appreciated.

Thanks,
Justin

Apr 28, 2011 | 12:32 PM

In2Trux

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Joined: Feb 2010

Posts: 1,742

From: Northern Ont

Welcome to TF
Don't forget to introduce yourself in the New Member's forum
New Member Area - Truck Forums - Truck Enthusiast Forum for Ford Chevy Dodge Toyota Nissan GMC pickup trucks

Apr 28, 2011 | 03:02 PM

timber74wolf

TruckForum Addict

Joined: Apr 2008

Posts: 818

From: Houston, Texas

Just go with the biggest 1.

Apr 28, 2011 | 05:05 PM

GMCSierraFan

Administrator

Joined: Feb 2009

Posts: 1,558

From: Midwest

I second that. It's better to need it and not have it...

Apr 30, 2011 | 09:36 PM

cubpak89

TruckForum Addict

Joined: Feb 2011

Posts: 879

From: iowa

bigger is better you can run more accesories from your truck with a bigger altenator im gonna try to put two on mine but may not

Jul 2, 2011 | 12:29 AM

kiss4afrog

Beginner

Joined: Jul 2011

Posts: 10

Bigger is better in most cases but you have to remember if the 130 amp is a bigger case size it may bolt right in but then you'll have to replace the belt too!