What size Allen wrench do you use to take the brakes off of a 92 Chevy cavalier?

The size of the Allen wrench needed to remove the caliper bolts on a 1992 Chevy Cavalier varies depending on the specific brake caliper design. There's no single definitive answer. It's most likely either a 7mm or an 8mm Allen wrench. You'll need to visually inspect the caliper bolts to determine the correct size.