Description:

GM part number 12557710 as shown. Not a repop. Mileage unknown.

Pulley turns smoothly. Previous owner drilled and tapped it for (I imagine) a steam port return, or possibly an aftermarket gauge. Plug it if you don't need it. Pulley has some small spots of surface rust on the exposed area. Nothing that won't clean up. Appears there was some minor grinding to the side of the pump, I'm not sure why. See photo.

Local pick up is welcomed; PayPal for remote buyers. I ship FedEx and get a good discount and will pass that along to you. Reach out with your zip.