Hey all. I've just recently purchased my Cadillac with 49k miles and I'm trying to get some suggestions on what to do first. I'm wanting to make sure I can clean out the engine of any built up carbon or gunk as just a peace of mind sort of thing and was hoping for some simple suggestions for that. I've also noticed what sounds like a rattle noise on light to moderate acceleration that I'm assuming has to do with the exhaust but I haven't had an opportunity to confirm that. If any of you guys have any other suggestions on things to take care of then I'm open for anything. I really love the car so far and I'm hoping to keep it for a long time.