2001 Buick Park Avenue Ultra 4dr Sedan (3.8L 6cyl S/C 4A)
I've owned over 40 cars, and this Buick ranks near the top. I purchased it 6 months ago when it only had 20K miles. I now have 42K miles on the car. I still can't believe I get between 35 - 40 mpg on the highway. A few minor issues with dash squeaks/rattles.
Comfort and mileage. The 3800 engine is one of GM's best in recent years.
Climate control. This is the second GM vehicle of recent years I've had with automatic climate control, and both have had problems.