1999 Pontiac Grand Prix (Worst)
For 1999, the Grand Prix grew but not in a good way. The car went from being the slender, well-designed pinnacle of GM design, to a cushioned large family sedan that shared its underpinnings with Buick and Oldsmobile models. That isn’t to say this generation of the Grand Prix was horrible. But, it wasn’t the best car you could get for the money (via Classic Car Database).
This generation of the Grand Prix was still notable, the car had a decent run in the NASCAR circuit. GM would try to position this Grand Prix as the exciting family car. Unfortunately, the only people who bought into that hype were rental car fleets and consumers looking for a deal on something heavily discounted.