Re: 1995 Blazer, 2-Dr, 4WD, V6, 4.3 L (vin W)

I borrowed a generic puller and was able to get the pulley wheel off the power steering pump without much trouble today. I used a solid spacer in place of a pilot bolt.

However, for pushing it back on, I'll definitely need a "pilot bolt". Bolt length is easy enough to figure out, but it's pretty dirty in there and can't tell by looking what kind of threads, US or metric, fine or coarse. Not knowing what's supposed to go in there, I certainly don't want to do trial and error and mess up the threads.

Can anyone tell me what size bolt I'll need for the "pilot"? Maybe somebody has the installer tool and could measure the pilot bolt for me.

Thank-you!

As per GM Manual:

GM Pulley Remover Tool part #: J 25034-B
GM Pulley Installer Tool part #: J 25033-B

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EDIT:

The websites below have a generic version of the J 25033-B tool and they're listing the pilot bolt as ⅜"-16. If anyone can confirm, that would be great! Otherwise, it looks like I may have the correct answer.

http://www.etoolcart.com/power-steering-pump-pulley-replacer

http://www.shopfreedomracing.com/Power-Steering-Pump-Pulley-Installer-J-25033

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EDIT 2:

Physically confirmed as ⅜"-16.

I was able to run my ⅜"-16 tap into it to clean out the rust/dirt and a ⅜"-16 bolt started well.