What size is the Allen key for 97 s10 2.2 liter 4 cylinder manual transmission?

For a 1997 S10 with a 2.2-liter 4-cylinder manual transmission, the Allen key size typically used for the transmission drain and fill plugs is 3/8 inch. However, it's always a good idea to double-check with a service manual or verify the size on the specific vehicle, as variations can occur.