I am looking for the spare tire and rim below from a Bonneville GXP and was told it is interchangable with the spare from a late model STS and DTS. Can you guys confirm that it is the same rim and tirethat comes in your cars? It's a 17x4 rimwith a 125/70/17 continental tire. Thanks!!

http://i32.photobucket.com/albums/d4/MoNsTeR_InSiDe/IMG_0694.jpg

They are interchangable