95 B1500 Altenator Question

[davedotwojo]

Whenever I use my head lights and heater at the same time the belt starts to squeal. I have a feeling this means the altenator is on its way out.

When I looked it up on Rock Auto, I noticed that there are 2: 90A and 120A. I would love to order the 120A, but I need to know some things first.

1. Do they both have the same connectors?

2. Would I have to use a different belt?

Also, my B1500 is a barebones model with a 3.9L V6. The reason I want the 120A is because I want to add a winch for lifting equipment into the cargo area and a power inverter for when I'm at a house without an outside power outlet.

Any info is greatly appreciated.

[alloro]

If the belt is squealing it means the belt is worn or glazed, or the tensioner isn't working properly.