Hey I have a 2002 Chevy Blazer LS 4WD 4.3L and I need to know the bolt size or where I can find the bolt for the rear brake caliper bracket. It’s the bracket mounting bolt. Not the guide bolt like the parts stores keep pulling up which are way to small and also they keep only bringing up the front ones which about twice as big. The bolts I’m referring to are on the back side and slide through the brackets and actually threads into I believe the knuckle or anchor bracket. (I’m not sure) This is on the side towards the differential. Thank you for your help.

 

I would check with a local junkyard...

 

Most local hardware stores carry metric 10.9 bolts. Just take one out and match it. I think it is either an M8 or an M10, course threads, so M8x1.25 or M10x1.25...probably around 25mm length.
I lost one of those bolts in my '02, got one from local hardware store. Only difference was that the hex head was larger than the OEM bolt's.