I know this question will seem stupid, but how do I know if I have the Bosch or Nippendenso alternator on my truck. The tag on the back of the alternator does not say that I can see although I will admit that I do not have the best eyesight. I am wanting to put an on board air system on my truck and the brackets are different depending on which alternator I have.

 

Most are Nippodenso

There is usually a "ND" stamped on the back