Bud gave you the best advice you can get!!! Get an itemized list if you're not sure what it entails. If you aren't inclined to do your own service become "friends" with a good tech, they'll talk to you about what does and what doesn't need doing. Let us know how you make out.
By the way, welcome to the site!!! You'll find a lot of helpful info here, good friendship and a bunch of nice people!! Check out the new members contest you could win a nice prize!!