I installed a 3k gsk and everything went fine, the key was on the shaft when i put the shut off arm back on, i don't know if i pushed it off the back or what, truck wouldn't shut off, couldn't tear it apart with it running, had to choke it at the turbo. when i took it apart the key was missing, i'm hoping that was why it didn't shut off, but where can I get that key, fast?

 

I know that my local Napa has an assortment of keys with the right size included.
Would assume they all do.
I paid 25¢ for one a couple years ago.

 

My NAPA didn't have one small enough, I tried grinding it down, but it was hard to work with, ended up grinding down a 1/4" washer, found the thickness to be just about right on. When i put it back together i saw what happened the first time, the key has a habit to push up out of the back of the hole since it is crescent shape, you really have to watch it to make sure it's in place since it's so small.