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2010-2011 Buick LaCrosse



  • Just wondering if anyone that has had a highway speed vibration in their 2010 LaCrosse has an update? Has it been fixed on your car? What was done to fix it?
    I have had the same problem with mine and and the power train is the main suspect. Since it has been a year since I first experienced the problem and it is still not solved, I am becomming more and more dissapointed that GM has not come up with a resolution for me or anyone else.

    2010 LaCrosse
  • Dave I have a 2010 Lacrosse, I don't have the vibration problem, I had a steering problem and GM was giving me the run around,I contacted Lemon, they were my saving grace, for a fix that GM couldn't fix after emon Law contacted them my car is now fixed, try Lemon
  • Thanks for your reply. What trim level and wheels do you have? I have the base CS with steel wheels and 3.0 engine.
    I just got back from driving a CXL with 3.6 engine and cast wheels. The car had the same vibration and at the same speed range that mine has.

    2010 LaCrosse
  • e_net_ridere_net_rider Posts: 1,380
    What sort of vibration?
    Can you tell where it is coming from?
    Is it steady? Does it change if you apply slight deceleration or acceleration through the speed you notice it?
    Yesterday I noted it is time for rotation. And the tires are so smooth that I'm thinking no re-balance.
  • It is a side to side vibration. One would think it was the tires being out of balance. It is not. Test indicate otherwise. Now engineers from GM have it narrowed down to something in the torque converter or something that rotates in a sideways direction of the car.
    It usually happens between 60mph and 80mph. I test drove a 2011 CSX yesterday and found it to have the same vibration. Another friend drove one from a different dealership and different model. It had the same thing.

    2010 LaCrosse
  • e_net_ridere_net_rider Posts: 1,380
    There just is not anything that rotates laterally to the body of the car, except the spider gears in differential and they should not be rotating unless you are driving in circles.
    Did the CSX have touring package? It would have hyperstruts.
    Were tires RFB? If it seems to be at front, did rotating front to back make any difference?
    The calipers might move slightly side to side if rotors are imperfect. Had someone rotated tires prior to it showing up on your car? Have you noted slight braking at those speeds for change?
  • e_net_ridere_net_rider Posts: 1,380
    I went for a short drive last night, killed sound, and paid attention. So quiet I did not hear engine, just a bit of road noise.
    But felt a nagging side to side bumping motion which also showed up at wheel. At 50MPH it seemed faster than if it were an imbalance issue. If this is what you have found, it is the slight amount of play in suspension bushings that are quite hard material. You will likely find this in most vehicles except maybe full size pickup trucks since they still mostly use the old big body RWD car type suspension. Other full size vehicles might fare well, such as Town Car.
    The Aurora was beautiful in the way it handled this annoyance, but totally different suspension design. Wish they'd use it more.
    During that run, I changed to sport mode and that knocked nearly all of it out. I could not feel any of it at the steering wheel thanks to Magnasteer.
    I suspect all Lacrosse have Magnasteer, which in my opinion could be set a little higher in Touring mode and apparently so for vehicles without Touring Package. Maybe even a little higher in sport mode.
    If this sounds like you, see if dealer can check/adjust Magnasteer. It might reduce the annoyance.
    I suspect the slightest out of round for the tire will aggravate this condition. Especially if uneven across the tread or mild cupping. Wide tires likely make it more noticeable since the objective is to keep the footprint maximized and even. I assume you've been testing on very smooth road. If driving on less than that, you should see similar motion/vibration, but changing some as you cross imperfections.
  • So, what you are saying is that if I had the ability to change to "sport mode" and "magnasteer" it will go away?
    What about the field engineer from GM that drove and inspected the car and said he was stumped? Was that just to shut me up? Even the field repsentative said it was something he would agree was a problem and should be looked into. So now that two GM employees, one service manager and the owner all agree, are we all crazy to think it can be fixed?

    Thanks for your input, my frustration with the car and problem may be showing in my words at this point. No disrespect intended towards you or anyone else.

    2010 LaCrosse.
  • e_net_ridere_net_rider Posts: 1,380
    I feel your frustration and that is why I attempt to help locate the issue. I could be totally wrong as to the source. Magnasteer is full time and might be on all models.
    I remember some complaints a while back related to magnasteer, but I don't remember the particulars. I think it was some thought the magnasteer acted like a power steering booster, they had steering issues, maybe. But the Magnasteer is more like a damper in my knowledge and experience. It uses a speed input on a basic system to decide how much resistance to apply. The amount of electricity applied is likely determined in computer. But questionable whether it will show a code if it fails.
    I have not looked at suspension either. If you determine you are at least looking in area of disturbance, then maybe you will get it fixed.
  • cooleyddcooleydd Posts: 105
    If you haven't already do a Google on "Magnasteer problems" and you will get over 50 pages of information. Good lluck!
  • bwiabwia Boston Posts: 1,061
    edited January 2011
    Read full article at

    A very positive and well written article. Here are a couple excerpts:
    • “We found that when driven hard, the LaCrosse CXS with the touring package gripped the road well and felt solid and controlled. The touring package includes the best handling components, such as H-arm rear suspension, 19-inch wheels, and continuously variable real-time damping. With this equipment, a very favorable ride/handling tradeoff has been achieved. Relaxed driving on choppy roads reveals a high degree of cabin isolation from the pavement. It's the kind of ride quality intended to provide superior comfort on long, straight roads that run between endless cornfields, or at higher speeds on the interstate. We could hear tire deflection as we passed over cracked tarmac, but we did not feel anything annoying. The driving was quiet, smooth and relaxed, and yet, the car does not float or wander. The chassis is still connected with the road, conveying a definite sense of control and agility.”…...

    • “There has been a focused effort at noise control in the LaCrosse, with mostly excellent results. Buick engineers have clearly studied sources of noise, then systematically damped, cancelled, or isolated those sources using materials like acoustic glass, liquid and fabric sound deadeners, engineered seals and tuned mounting systems. The car runs quietly to begin with, given the gentle nature of the V6 engine and tall overall gearing that permits low-rpm operation. But these sound control efforts have definitely borne fruit, as the LaCrosse has a sound level measured at a quiet 35.5 decibels at 70 mph. We're not sure how that compares with the competition, which is also achieving remarkable noise suppression, but we can tell you that during our drive time, the loudest noise in the cabin came from the air conditioning fan.”
  • e_net_ridere_net_rider Posts: 1,380
    I have heard about a lot of complaints concerning magnsteer. Some posts I saw seemed to blame it for issues that could not have been related, so chose your finding carefully. I found this to be quite good if accurate.
    Points to note. If the signal used to tell this system is not generating, it will set a code related to internal transmission problem. Signal is used for other things as well. Other than a code that shows the coil is open or shorted, there is no code. You have to manually check fuse for magnasteer and the rest of it is by perception of test drive. I guess it could be not working properly and you would never know unless you know what to look for? I wonder if the newer are adjustable as mentioned in article?
  • fiftyslost1fiftyslost1 Posts: 2
    edited January 2011
    Does anyone know if there is a wire in the overhead console that is hot only when the key is turned on? I want to install a back up monitor and tap into a wire if possible. No sunroof.
  • gmcustsvcgmcustsvc Posts: 4,003
    Can you please email me with more information about your situation including your VIN and current mileage? I look forward to your response.
    GM Customer Service
  • bwiabwia Boston Posts: 1,061
    Perhaps this has been answered before but I have a question about Bluetooth. I am upstairs in my house and my AT&T Nokia 6350 cell phone displays the Bluetooth icon. My car is in an attached garage and my key fob is in the car.

    So my questions are: why does the icon appear on my cell phone and can I make a call from my built-in car phone even though my cell phone is in the house? and this leads to the most important question, does that draw down the car battery?
  • cooleyddcooleydd Posts: 105
    Is there any reason to join the OnStar advanced plan when I have the built in directions in my Lacrosse?

    Does the phone work the same without OnStar - that is work from the buttons on the steering wheel?

    Seems like OnStar duplicates these above, except of course, the accident notification and monthly report of the condition of the car, etc.
  • cooleyddcooleydd Posts: 105
    Is anyone else having problems with the 2010 Lacrosse CXS not downshifting when needed. When I slow down (usually up a slight grade) the car seems to loose power and not down shift when needed. This has gotten dangerous a couple of times when I needed to pick up speed and it just kind of sputtered.

    I have had it into two Buick dealers shops and they both could not duplicate my problem and said nothing was wrong. It worries me especially if someone else would drive it and get into trouble. There is something wrong!!!!
  • e_net_ridere_net_rider Posts: 1,380
    The icon may only be indicated that you have bluetooth enabled on the phone. You need to check your menus for the connection to car which will likely show under info that it is not connected unless you have turned on at vehicle by starting or using accessory position.
    Why are you leaving FOB in vehicle?
    There is no phone in car except the OnStar and yes you can make calls on OnStar if you have minutes.
    There was some issue that an update was supposed to correct with drawn down batteries. The programming was to minimize power draw and lean it even more after a few days of not starting.
  • e_net_ridere_net_rider Posts: 1,380
    The phone works the same I believe. I have not even enabled onstar yet, but should just so I can check it out.
    It does seem like a lot of duplication, sort of like wearing a belt with suspenders maybe?
    I sure can not say the Nav system is totally accurate.
    I believed that early onstar was a SAT system so you'd be able to place a call from almost anywhere unless you were in something such as a cave. The manuals of recent vehicles say it uses cell towers which is no advantage over your cell phone. The SAT system would be much more expensive on a per minute basis, but would overcome the difficulties of remote areas. Other than for voice, most communication would be accomplished by a quick burst of data and that should cost no or little more than current. Also nice to know that if I'm out of range of cells I could still get help or be located.
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