2005 Pontiac Bonneville GXP 4.6 V8 from North America




This car was plagued with problems from brand new, and they continue to this day. Do not purchase a GM product. After having several, I got disgusted and started buying Fords. After hearing that GM had fixed their problems, I bought this car brand new, and loved it. It did not take long to realize that this is the worst car that I have ever had! Complete junk! Now GM is claiming to have fixed their problems again, beware!

Starter went bad.

Intake crossover gaskets leak, that's what I think killed the starter.

Power steering lines developed a leak and were spraying fluid everywhere. The pump also went bad.

Front bearings and hubs went bad.

Water pump went bad.

Easily breaks engine & transmission mounts.

Oil cooler lines & valve cover gaskets leak.

Gauges do not work.

Interior floor in back seat fills with water.

Radio lights burned out.

Driver control center went bad.

Continuously blows fog lamps and headlights. Has been rewired with new upgraded harnesses and wiring by dealer, but lights continue to blow.

Seat heater fried.

Blower motor fried.

Side cladding pops loose. Is simply held on with two sided tape.

General Comments:

This car is very tempting. Very fast with Northstar V8. Looks sexy too.

Don't be fooled. You will regret your purchase.

Would you buy another car from this manufacturer? No

Review Date: 12th April, 2012

12th Apr 2012, 16:17

Not everyone's experience is like yours. I have never had anything but GM products since '01, and they have all been very reliable. I have had 1 Chevy, and currently am on my 4th Buick (which I have only had for a few weeks). I will admit I don't put a lot of miles on my cars (usually under 35,000 miles), but the first 2 cars had over 100,000 miles when I got them. I have never had a major engine or transmission issue with any of them, and really like the styling and comfort of GM products, especially when compared to more popular import makes.

2005 Pontiac Bonneville GXP V8 Northstar from North America


Best luxury car for your money


Replaced the stock front rotors and pads for some better ones that stop faster and don't warp at 50,000 miles.

Needs new wheel bearings at 77,000.

General Comments:

This car is the perfect cross between comfort, luxury and sport. I have friends with BMW's who don't have anywhere near all the options my car has. It will cruise all day long at 85-90 mph and still get 24-26 mpg.

In town driving hurts your gas mileage, but I love my car. It is fully loaded, including leather and suede seats.

The car will handle like a dream at 125 mph (only did it once) but I wouldn't go any faster than that. One gentleman said he did 138 mph but I don't know that for a fact. I would DEFINITELY buy one of these again.

Would you buy another car from this manufacturer? Yes

Review Date: 26th June, 2009

31st Oct 2010, 16:29

I have an '05 Bonneville GXP, and it is an amazing automobile. I had my car up to 130 miles per hour, without even trying... and the only reason I stopped there was because I was afraid of getting a nasty ticket. Not sure how high I could have gone. I will never appreciate a car as much as this one!

17th Nov 2010, 14:37

"Not sure how high I could have gone."

- Knowing the Northstar as I do, with the speed limiter taken off, at least 150 mph.

24th May 2014, 18:59

Had a black 05 Bonnie GXP. Had it at 155 once, was going for the 160 on the dash, but the back end started to get a little loose and began to slightly sway from side to side, so I backed off the throttle. IMO, it will do the 160 easily. I have smoked everything from BMWs to Mercedes to 5.0 Mustangs. It's not the car, it's the driver. Always remember that.

On the down side: the motor mount broke, when I do not know, and the wheel bearings had gone bad and needed replacing. Got rid of it instead of paying to fix all that. But I would definitely buy another one if I can find one with low enough mileage.

Last thought, I am a very, very aggressive driver. I'm sure normal driving would have prevented some of these repairs.

Overall: it is a very good car for the price.