Overview & Reviews

The OnStar communications system is now standard on all Bonnevilles.

• Loads of gee-whiz features, solid handling, powerful V8 in GXP, excellent crash test scores, large trunk.

• Average interior materials, overly complicated controls, poor resale value.

User Reviews:

Showing 1 through 10 of 62.00

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  Pure Fun - 2005 Pontiac Bonneville
  By V8frk - November 30 - 11:33 am

  I went from a 2001 Yukon to my 2004 Greystone Metallic GXP. The size was the toughest adjustment, but the power and handling made up for the loss of room. Its nothing but muscle and fun to drive. Theres nothing better then merging into fast moving interstate traffic and listening to the growl of the Northstar at its best! I have had it in for warranty work four times since purchase in six months for silly minor things and one major A/C water leak which the dealer kept in the shop for a week! Probably more of a dealer issue. The brake rotors rust as well and the dealer thinks its acceptable.

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  love it - style, performance, economy - 2005 Pontiac Bonneville
  By clevelandbonneville - October 14 - 10:00 am

  This car is great. I bought with 90K. It now has 102K. I love the style. Very stylish car. Its big!! Its comfy. It has a very quiet cabin. The gm 3.8 is an amazing engine. Actually got 30 mpg when doing a highway trip of 480 miles. with 16 gallons of gas. It has a big gas tank at 18 gallons. Dont need to fill up much. Normal MPG is about 25 with highway/city mix and not winter out. One problem it died on me on the freeway. Kinda scary. It was the Mass airflow sensor. It happened out of nowhere. No engine lights. I would replace this at 100k miles or sooner. Thats when it died on me. Besides for that no problems. You can probably have autozone replace for you.

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  Bonneville Good But Bad - 2005 Pontiac Bonneville
  By fig newton - November 7 - 2:33 am

  GPX is a great car, but if you buy a used one please get a 0 deductible warranty. Have had $6000.00 of work done. lucky all but about $800 was covered (Shocks and brake-not covered), all problems caught by dealer during normal maintenance. The problems,oil and H2O leaks, rear drive problem, Onstar/radio, control for heat and air condition, wheel bearings eta. I have one year left on warranty- lucky me.

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  Improvements needed - 2005 Pontiac Bonneville
  By Sam Abraham - October 29 - 12:20 am

  Air conditioning leaves a lot to be desired. In 95 degree weather it did not cool even when recirculatimg the inside air.

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  Salemans Car++ - 2005 Pontiac Bonneville
  By KRA218 - July 27 - 12:16 pm

  Studied them ALL for six months and decided on the GXP. Looks, Power, Handling, Comfort, Value and its American! Purchased used for 12,000+ under MSRP. Today you good do even better!! Highly recommend for us sports car lovers that need a 4-door business car to satisfy the Boss! Mileage 17/22 and I do not expect it to get better with already 22K miles on her!

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  Run rabbit Run - 2005 Pontiac Bonneville
  By Troy Ott - November 10 - 2:56 am

  Check for leaks, head gasket, overheating

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  2005 Pontiac GXP - 2005 Pontiac Bonneville
  By Mike Wandell - April 13 - 4:56 am

  I really love this car, I am in sales and drive it all over. It has all comfort I need and the the power when needed. I almost traded it in about 6 months ago on a Cadillac CTS. I took the Cadillac back and got my Pontiac back. The Cadillac was not as good as the Pontiac. Its just a lot of fun to drive, at night the dash looks an airplane cockpit.

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  Cant Believe its a sedan! - 2005 Pontiac Bonneville
  By Stick1234 - June 10 - 10:00 am

  Very comfortable with a sporty ride for a big car. Lots of bells and whistles. The Northstar V8 kicks ass and runs very smoooooooth. We are averaging 17.5mpg and the last long trip we got 25.3mpg the gas milage is better that the SUVs we had been looking at. Only problem so far has been fit and finsh. The driver side rear door was out of adjustment from the factory and that caused a scratch where the door meet (dealer fixed). The special red paint option is beautiful but ours scrathes very easy. I hope the clear coat gets a little harder over time.

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  bonneville - 2005 Pontiac Bonneville
  By jolaine wagg - May 30 - 4:20 am

  This car handles the road well, corners nicely.It is a beautiful riding car and very comfortable. Fuel economy is good for a V8.

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  Great Bonnie! - 2005 Pontiac Bonneville
  By DMP - May 4 - 10:50 pm

  Purchased as a demo in 2007 with 21K kliks as a replacemennt for my 94 SLE (nice car); Now at 53K. Daily driver for mostly city driving. I love the styling - stealth-look black exterior turns heads and clears traffic on the highway. Interior is comfortable for my tall frame. Excellent ride. The GXP is very thristy; in keeping with the performance image the final drive was raised to 3.7 which drops the mileage by about 20% over other NorthStar equipped cars.