AL6509N, that is the 90 AMP. Your truck could have a different amperage dependent on accesories. To be certain of a Dodge part number, if you need the manufacturer number. Call a dealership with your VIN number handy and they will be able to tell you the part number for sure and amperage of your alternator. I have no access to official Dodge part numbers and it must be searched by VIN whichi we cannot do either.