"Bought this car new and have enjoyed the extreme reliability of GM's flagship 3800 V6 engine and great transmission combination. It has lived up to the EPA's published MPG estimates of 19City 30Hwy, and in fact on one stretch of a long road trip, made 31MPG. That's phenomenal for a full-size car. Creature comfort is 2nd to none, and leather seating material and workmanship is flawless. Maintenance has been easy too. The only complaint we had is on the inferior material used to manufacture the power window lifts, which caused premature failure. Fatiguing caused a nylon component to snap off, binding the cable take-up spool. You can only buy as an assembly ($234.00), which we found excessive. This problem is not unique to Pontiac, as GM uses this same generic part in all of their sedans, so we chalked it up to a widespread deign defect across the board for all of GM's line of cars. We're still enjoying this great car, and we take excellent care of it."
"I have a 2000 Bonneville that I bought in 2001 with 13,000 miles on it. It now has 212,000 and still running like it's new! It has every option that was offered in 2000 and I felt like a queen when I first drove it! The mileage isn't as good as it was 8 years ago, but I still get 25 city, 30 highway!"
"Great car, though it does have its fair share of mechanical problems as it ages. Window regulator(s), fuel level sender, intake manifold gaskets just to name a handful. These will need to be replaced eventually on all Bonnevilles of this vintage. Since I'm a skilled backyard mechanic, I don't mind fixing things.
The car is sporty, easy to maintain, and a blast to drive. Parts are plentiful and cheap. The 3800 engine is bulletproof, used in tons of GM vehicles, and will outlast the car.
For such a large heavy car, interior room isn't as roomy as one would think. Being 6'2, when either front seat is all the way back, the rear seat is almost useless except for very small children. Still it is very comfortable and controls are well laid out.
Fuel economy is very good for a large car, I average around 24mpg. Supercharged engine accelerates effortlessly, very wide torque curve distributes good power at practically any RPM.
I'm going to drive this car till it falls apart, and the way it's going, that's going to take awhile!"