To be more specific, on the bottom line of that rpo sticker in your glove box, it says bc/cc and then two 3 digit codes. The first set of numbers followed by a letter is your truck's exterior paint color code. The second code on the bottom right should be your interior color code. A Google search can give you a list of all of gms interior color codes and what they are calle. match your code on the list of codes and names.