The vehicle randomly accelerates as high as 50-60mph without touching the gas pedal. The car has to be thrown in neutral or stopped some place safe, at which point it revs up past 3000 RPM until the gas pedal is pressed to throttle it back down. The vehicle has done this in reverse while backing out of a driveway as well, which is extremely dangerous. It does not seem to do this upon starting or while it is warming up. It can be on any street or highway and at any speed when it starts revving high. The problem is intermittent, but clusters sometimes several days in a row as constant and then going a month without doing it at all. It does seem to be more likely to accelerate after hitting a dip (like near where a drain is in a parking lot) but that may be just coincidental. The car has been taken to two different mechanics on three separate occasions with a tune up done and the throttle body cleaned along with some other trouble-shooting with the throttle at a cost (thus far) of several hundred dollars. The vehicle is doing this so frequently in the last few days that is has become unsafe to drive.

- Rossford, OH, USA

Within the passed 2 months I have been experiencing "hard shifts". very pronounced jolt/jerk when accelerating after a full stop or decelerating to come to a stop. Just researched on this site and found many other consumers with 2004 Lesabre's experiencing same situation. Has to do with inferior pressure control solenoid and/or shift solenoids. Apparently GM has refused to recall and replace due to the cost. Can cause premature failure of transmission and they say they are under no obligation to make it right!!! also have had problems with speedometer and tachcometer. My tach is frozen at 2 and speedometer started giving false readings about 3 yrs. Ago. Did not address because my mechanic told me its very costly. I have to use my garmin to tell me how fast I am going. Happened first time in extreme heat traveling on highway. Then again when it w as raining. Very unsafe situation and again a very costly fix that GM will not address.

- Clifton, NJ, USA

While driving home my fuel gauge stopped working. When I got home I turned the car off and then back on and the fuel gauge was now in the 6 position on a clock. Now I have no idea if there is any fuel in the car or not. Luckily I reset the trip meter with every fuel up so I know I can go approximately 300 miles. Although in the winter when we have to idle our car so the fuel mileage goes down and I do not get as many miles on a tank. Hope I don't run out of fuel during the winter. In reading online reviews about this issue it turns out it can get worse and cause the speedometer to stop working. Then I may be speeding and not even know it. I did try and have it fixed but the guy charged me $207 and it did not fix the problem. At the local GM dealership they said they would repair it for $350.

- Merrill, WI, USA

First fuel gauge would not work cost $400 to replace system now my mileage works when it wants can/T always tell how fast I am going then all of a sudden it will work.

- Garden City, MI, USA

I bought this car May 2010 from gregory automotive group in new castle de. I immediately had a propblem with the speedometer the day I bought it, took it back to the dealership and was told that it wasnt a big deal, this problem was covered by by warranty and I would just need to pay a $100 deductible. I took it to my local Buick dealership and they told me that it isn't covered under the warranty I bought from the dealer and I would have to pay out of pocket for the repairs. My next issue is the gas gauge started to mess up; wrong readings and gas levels left me out of gas and very upset. I will be taking this back to Buick to see if I am at all eligible to recieve recall benefits or something because the amount to fix these issues are greater than I can afford within the year and some change of owning the veh. And I also want to say I did research and do a carfax on the car and it came back with accurate mileage, one owner and no accidents and I jumped on it, only to have a nice car without a working speedometer and gas gauge. I thought Buick were good solid cars......

- Wilmington , DE, USA