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

 

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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!