My 04 Impala is nearing it's 60,000 mile mark. I bought it in 2004 at 30,000 and haven't done much besides change the oil and brakes. I was wondering what should be done to it come it's 60K. I was going to have a tranny and radiator flush, some new brakes and probably tires. Come to think of it I should check the plugs. Anything else I should look at?