All info, living in my garage, predators? Will they live through the winter up in my garage?
It's hard to guess what they are without a photo or detailed description. If you didn't take a picture, you can look through photos on Google's image feature just by searching for the colors and see if you can find a match so you know what they are. Let us know if you find it.
Here is a link that might be useful: Google images search - Black and Orange Caterpillar