30k mile checkup for a 2005 Cadillac STS? My 2005 Cadillac STS V8 hit 30k miles. I've been driving it since it had 18k miles on it. I replaced the 10 year old OEM tires and I've been changing the oil and it's had a new air filter and cabin air filter. It's had no firmware updates. 

Question: Should I take it to the dealer for it's 30k?

Thanks!