Last GM vehicle I owned was a 2001 Buick Regal GS. Overall, I liked the car, decent mileage, good power, looked nice.
Took it to the dealer for the check engine light (my scanner said it was the EGR, but didn't get more specific). Well, over $1,000 later, I had my car back.
I complained to the "service" rep I had that I didn't think this problem should have occurred on a car with less than 40,000 miles on it. I was one year over the 3 year warranty and 1,500 miles over the 36,000 limit at the time. She said, point blank: "Well, they are designed to fail."
I called Buick's national customer service line to report that, and let them know exactly why I'd never buy another Buick, or GM product again.