my boy friend is buying a 2003 cts from a friend of his... he has ask me to find various parts for the car. but im at a loss without actually seeing the title to know the submodel. he says it has a v6 turbo in it so am I correct in assuming its a luxury sport edition? Also the sunroof doesn't work. the previous owner thought it was a fuse but a new fuse didn't fix it. ive looked around online thinking maybe it is the motor but am having no luck finding it. I myself own a ford and always have so I don't know how Cadillac operates as far as mechanical anything goes. or what the technical name of parts is. Im at a lossss. Hoping someone can share some Cadillac wisdom with me. thanks to anyone who will take time to help me figure it all out