Does anyone know off hand how long the 12mm caliper mounting bolt is and where I should be able to find it. I was driving home last night and hit a pot hole and one of the two bolts came off.

 

Try M12-1.75x33.1

GM#: 10229606

Was it front or rear?

 

It was front drivers side, but it doesnt matter now. Had the car towed to Chevy and the bottom bolt they said was seized onto the caliper and I need to have it replaced. They are replacing both front calipers. The front passenger side was ok, but I'm not about to complain. So now is a good time to get some warranty work done. Thanks anyway!