It's a great car with an awful engine. The Quad 4 is infamously unreliable. Granted, it's a great engine when it's working, but since it's such a pain to work on, it gets expensive when something goes wrong. They're notorious for blowing head gaskets at around 120,000 miles. Mine is leaking, and it's currently at 130,000. It's about $1,100 if you just need a new head gasket, and about $2,400 if you need an all new head. Also, GM put iron rotors on the car, replace them with steel ones, and they'll be less likely to warp.
This is a great car! I enjoy the ride it provides, the low maitanence engine, and the air conditioning! I think that this 3.3 litre V6 is a great motor which should not be taken for granted!! I would suggest this car for people that want one heck of a car!!
If you don't mind forking out $800 a year on maintenance you can keep it going for 235,000 or more. I commute (for 12 years) 28 miles each way (I know, I know, should move closer to work) & this car has never left me stranded (knock on wood. I drive in - 30 degrees F in the winter and have never had a problem. I guess I got lucky with this series of 4 cylinder engine. I run with synthetic oil. Hope it makes a difference. Engine burns no oil. Yes, be prepared to have your brakes replaced every couple of years or sooner.