I've searched everywhere. I'm looking for the size of the bolt that holds the caliper bracket to the spindle on a 2002 4wd. I know its an 18mm but I'm looking for the thread size and pitch. Started getting a noise and found one missing. Nobody has one without ordering it. If I could figure out the size I could probably source it.

 

pretty sure the head is 18mm, it is on my 05
go to a wrecker / pick and pull and get yourself one

BTW take a good look at the threads in yours before you go
You might need the bracket as well

 

like rex said, i would hit up a PnP and get one from there. just dont drive it until then. you can cause serious damage and possibly get into an accident if that hits the wheel.
just make sure that there is nothing else that you need so you dont spend 5 bucks on one bolt, ya know what i mean?

 

14x1.25x35m on 2wd big brake, I think. I check to be shure.

 

Does anyone know where I can get this bolt? Advanced auto parts tells me im SOL and Chevy is telling me they dont have a diagram of this part.

Any suggestions?