I wish to replace my 2019 XT5 grille with a diamond grille form 20-21, Are they interchangeable?. I called my local Cadillac dealer parts dept. and he wanted me to give him the part number or find a 20-21 XT5 with the diamond grille and get the Vin number for him, sounds he was blowing me off. Any suggestions or fitment issues would be appreciated.