Has the ALT in 09-up different from the 04-08 ?

[Pontiac1976]

The Aveo looks like it comes with 4 pin /3pin/2pins we had a few different set ups but . I guess it depend on what Alt wire set up you have. The Optra we only had one set on the two I looked at off 04 so I do not know if the come with differend pins.The 09 Aveo's two different to easy work with.
As I use to play around the alt 73-87 car & trucks make what I want it or repair them. But I never had one apart seen it there as easy as those I worked on. If they are it should be to hard. The thing is the plug pins have to match yours wiring.

The pic's

The pic's
Some had a/c with 4pin, some had a/c with 3pin I think there was a 2pin with a/c. I would have thought a 4 pin would have been a/c. Now I not sure what different is for the plugs beening different is most likely higher up put & maybe some ecm. You would have to check your car then check wiring book to see.