Seems like there are a couple different GM alternators for the 07 H2 according to RockAuto. Both are 145amp, which is fine for me.

One is of the "Family" AD244, and costs $272 for remanufactured including core charge. GM 3212128
https://www.rockauto.com/en/moreinfo...t=2412&jsn=374

The other is from the "Family" 44G, costs $139 and is brand new. ACDELCO 3351236
https://www.rockauto.com/en/moreinfo...t=2412&jsn=366

The main difference I can see is the size specs, the first one seems to be a much bigger unit by 3-6 inches depending on height and length.

I currently have the 3351236 with DR44G stamped on the case.

Anyone have any input on the difference between the two? Or, comments/advice on what would be the more dependable?

Thanks in advance. (This is my first experience with the 6.0L engine)

 

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Always good info thanks.