How can I determine the amperage output of my alternator? Ther are a number of numbers stamped on it but I don't know what they mean.

 

This is what my 136A alternator looks like:



And this is what my new 220A alternator looks like:
It is the alternator from a 4500/5500 with the "ambulance package"





Chances are, if you didn't order the snow plow package you have a 136A alt.

Scott.

 

07 136 amp stock 269.00 high out put 180.amp 349.00 Fits 03 to 07