Ok, first of all thank you, you just saved me money!

Now, I’ve pried loose the outer section of the dashboard which holds the radio and have pulled it out several inches. But I’m not sure exactly what I’m looking for? Will it be a sticker or stamped into the plastic? Will it be a four digit number? Do you have a better idea of where it will be? If I find a number how do I test it? Please help ASAP. Thanks again.