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Ideally that’s what I would prefer to do. But I appreciate both sides of input. I’m very thankful for the information that I won’t be SOL if I have to use a standard stud or bolt.

I found part number 12337960, however from everything I have seen, this does not have the flanged shoulder. If you have a source for the one with the flanged shoulder, I would greatly appreciate it. Like I said, my OCD gets the best of me and I would prefer to put the OEM part on there.

That’s what I was hoping to hear, but wanted to tap the knowledge source here. Thanks so much! Sometimes my OCD gets the best of me.

Thank you. The ones from Autozone will not work either unfortunately. The shorter part of the stud is 5/16 20 thread and the longer part of the stud is 5/16 18 thread. Leave it to GM to use a part as messed up as this...

I forgot to ask if I was wrong in the assumption that these appear to help center and prevent the pulley from slipping around on the water pump. If there is another type of stud or bolt that will work just as well I will gladly take those recommendations. Thanks, I can find those ones that you...

So, I’ve tried searching this forum and countless others. I’m looking for the 5/16 shouldered studs that mount onto the nose of the water pump and keep the fan pulley centered and attached to the water pump. I found a part number in the 289-34P TM, which was 14061661. Problem is this is...