I am trying to find the head size of the Front caliper mounting bolt on my 94 c1500. I have looked around a lil and each one seems to argue that it'* a torx bit and others say it'* an Allen and that it'* 3/8 I tried the 3\8 Allen socket and it was too big... Why couldn't they just use a hex head bolt like the rest

It'* probably a metric hex head.....

10mm allen/hex would be bigger than 3/8, so my guess would be 8mm....

I believe the bolt on my mom'* '95 Blazer was an 8mm hex head.

Different application yes, but it sounds good?

You could bash that 3/8 in with a hammer. Just kidding. lol

Mike, thinking about it, you might actually be right.....if the inside is rusted so bad, you might have to actually drive that 3/8'* in!

LMAO, yeah.