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

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

Just go with the biggest 1.

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

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

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!