What Is An Appropriate Graduation Gift?

My daughter will graduate college this fall. When she gets out she will be debt free. My wife and I have paid all tuition and book costs and also bought her a 2000 Jeep Laredo and paid for the insurance. She kept a part time job for her “fun” money. When is enough..enough?
Oh yeah I almost forgot. My youngest daughter graduates high school next month. She already has a 1999 Dodge Intrepid. De ja vue…all over again. Anyway; what is appropriate for the college grad gift?