2006 Pontiac Grand Prix GXP 4dr Sedan (5.3L 8cyl 4A)
This car has been great. I've had it for a year and put about 24,000 miles on it, without a single problem. V8 is awesome, and gives mid-20's gas mileage (mixed driving, but more highway). Looks great in black. Got it loaded with options for under 30k. Very comfortable car for me (5'6"), and everybody else I've ever had in it. Car rides, brakes, and handles very well. I'd recommend this car to anybody, at least drive it before spending comparable money on an Accord, etc.
V8! Also love the nav system, which puts instructions on the heads up display so you don't have to look down at it. Heated, very comfortable seats. Vented disk brakes, great suspension, and oh, the V8.
Works ok for the winter, but an AWD option would be nice, which would also improve handling when giving it a lot of gas (300hp in front drive can be a little exciting). Flex fuel would be great in a few years.
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