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2010-2011 Buick LaCrosse



  • e_net_ridere_net_rider Posts: 1,380
    Does it respond when you push accelerator?
    I too noted that it seems to bog to the point it feels like it might be on the verge of stumbling, misfire, something like that, before it downshifts on long upgrades.
    How is your mileage?
  • cooleyddcooleydd Posts: 105
    When I keep pushing the accellator slory it does not respond. What I instinctly do is tramp on it and even then it seems to react slowly.

    My mileage for mixed freeway and town driving runs between 18 and 19. Not sure what freeway only does - have not been on a trip for awhile. I am an easy driver - no fast starts, etc.
  • e_net_ridere_net_rider Posts: 1,380
    how many miles on it? Were you ever getting the clang on start?
    That mileage is not impressive except maybe in a bad way.
    I too notice that it takes a lot of accelerator movement to see any significant response.
  • cooleyddcooleydd Posts: 105
    12000 Miles
    No clang
    Seems like I was getting better mileage when it was newer - but not sure. Does not seem much difference if I use premium or regular fuel - Shell or Costco.
    It IS a grat car except for the down shifting problem.
    I really love it!!!!
  • e_net_ridere_net_rider Posts: 1,380
    That is part of my issue, mileage better before 2500 miles. It seemed to drop suddenly and that was the mileage when I started getting the very loud metal on metal sound at the precise moment of start. Others had exhaust system changed for that and no one seems to know the exact issue although suspicions of something loose inside possibly creating a bad exhaust flow. I'm mentioning it the next time in and will post back if they change it. Also that was around the time I started noticing a slight weakness in mild acceleration.
    I have run nothing but premium and it is Shell. I think I will fill with regular as a comparison.
    BTW, Mobil 1 is supposedly the factory fill on this engine. I saw an ad for a distant dealer a week ago advertising the dexos oil change special and it said part synthetic. I changed mine just before that and used Purolator Pure One cross from PF63 filter since it was not available. Refilled with Mobil 1. Old oil looked really nasty for 22% life left and discovered factory filter was missing anti-drain back valve so there is a good chance I was getting dry starts and don't know how that might have effected issues. I just ordered oil test kit and saved the drained oil. I'll post results when it is done. So it seems there is a possibility that the loud clank I was hearing may have been from the VVT mechanism because oil drained from it while shut down. Until started the mechanism is locked to start position with pins. Since normal control is via oil, no oil present may have allowed it to bang against the chamber limit.
    I keep my tire pressure very constant at the factory 35PSI for the GY 19" tires.
    The vehicle has its good points but came from factory with too many mistakes. Hopefully I get all those worked off. But in my view there are also too many short comings for this to be luxury although you'd have to hunt hard to find vehicles this size with all of them.
    BTW, I've heard rumors of a shift program update for this vehicle.
  • I was getting a clang at the instant my 2010 CXS started. It immediately went away when I switched to Shell 93 octane. Gas mileage improved as well.

    My clang was intermittant and not dependent on ambient or engine temp.

    Been gone two full months now
  • The blue tooth icon just means yu have the service turned on in the phone menu. BT has about a 30 foot max range.

    Why not just try it but you'll need two people. If it works the voice will just be heard in the car. My guess is that signal strength is not sufficient and car would need to be in "On" .
  • cooleyddcooleydd Posts: 105
    I keep my GY 19" tires pretty much at 35 lbs - have a good air pump in the garage. It increases on the road to 37 to 38.

    I just checked my oil and it is low and very dirty. I changed at 3000 miles and then again at about 7500 miles and I plan on doing it again in the next few days at 12,000 miles. I have not checked the oil between changes until now - but the dealer never said anything about the oil being dirty or low. Certainly I have changed the oil much more often than I have been advised by OnStar.

    My mileage runs between 18.5 and 20.5 now (I gave the wrong information before). I do keep track of my miles every time I get gasoline on a calendar but my wife stored the 2010 calendar and she is not here. Will check later and repost a better history from the beginning.

    If you find out anything about the shift program update let us know. I will ask next time I am at the dealers for the oil change.

    At 80 years old I no longer have the ability to do the things I should do, or used to do, on the car (and other things) so I take it in to the dealer (and pay for it). For example I do not think I ever had the hood open on my own since I purchased it until today. Bad - but the best I can do.

    I have two kids 16 and 19. The 19 year old drives his own car. The 16 year old has her license (and car) but I still restrict her driving to daytime only and not even to school. She is into competitive "Cheer" and practices three days a week plus some out of town competition. Most of my mileage has been driving her around. When I feel comfortable with her driving I will not drive much. She also works three or four days a week and she is allowed to drive to work as of about a month ago - I used to take her there too. Wife works so many times it is up to me to get her around. The mileage is almost all due to taking her to and from her activities

    And that is how it goes at this house!!!
  • crankeeecrankeee Posts: 297
    edited February 2011
    cooley: Let us know if you find out about reprogramming the shift patterns on the Lacrosse. We had that done on an older GM and it improved the driveability overall and that car got 30+ on the highway at 70-75 so it worked and did not "search" for gears due to upshift preference for mileage.Oil change at 3-5000 max for GM-forget the oil life %!
    Pretty cool you is -80 and two kids 16 & 19. How old is the wife?
  • cooleyddcooleydd Posts: 105
    Michiko (Japanese) is now 52 and I have a couple of older kids by my first wife who died from breast cancer at age 44. The are now 50 and 52. Plus I have taken care of a few other kids in my lifetime. Michiko and I have been married since 1988 and I have know her since 1986. She was born and raised in Japan - it is a beautiful love story.

    I usually post everything I learn about the Lacrosse.;
  • gberpagberpa Posts: 44
    Have an appointment Wed for a seat memory module replacement. I will ask about elsewhere reported Nav system update and the shifting program. I seem to feel this shifting issue is not to bad for me. Although when accelerating slightly uphill, I sometimes see the "shift" go opposite to what I expect, eg rpm drops. But, this could be programming to get best mpg (??).

    BTW, ever since I reported the exhaust system replacement for my "clang" on startup, I have not experienced any more instances. Now at (only) 3170 miles
    due to 3+ weeks out of town without car. 2nd BTW: car started out instantly upon return (garaged at 20-40F without theft deterrent activated).
  • gberpagberpa Posts: 44
    I had the 2011 CXS in for service today (seat memory module and Nav data update). I asked about downshifting issues and a possible fix noted on this forum. On my car, I only notice a slight rpm drop on upgrades without mashing the pedal when I actually expect it to increase!. For me, its no big issue. What I was told that there is a "dead spot" on GM's 6 speed automatics and there is a reprogramming fix for some vehicles but mileage suffers. I told them if there was a "fix" for the LaCrosse that didn't affect mileage, to do it. Upon checking all the TSBs, they said there was no fix yet for the 2011 LaCrosse.

    Regarding the seat memory module replaced today and reprogrammed, after resetting my seat/outside mirror positions and setting up on "config" as I had previously had it [easy exit, memory seat, passive entry-all doors], the system seems to be working without the problems previously noted in my earlier posts. Also, the return to driver seat position on entering has a bit longer delay time than before which is more convenient. Of course, I need to give it a bit more time before concluding the fix is permanent.

    The Nav system was updated today. It must have been updated previously before December as the invoice then said "no change" but my 11/2/10 notes prior to that visit showed Version U40D, V 20.09.03, unlike my reported post which said U306, V20.09.03. Today, after service, it is U413, V20.09.03. It looks like the map is unchanged as a 2 year old street in my neighborhood still doesn't show. I haven't noticed any major changes yet. I think the default scale looks a bit "cleaner" and has a different font. As time and experience increase, I will report if other changees are seen.
  • cooleyddcooleydd Posts: 105
    I just took a trip of about 200 miles and averaged about 28.2 MPG. No airconditioner and very little in town driving. Used Costco Premium.

    However, there is no question there is a problem with the shifting. Numerous time it seemed to lag when I tried to pick up speed. It can be dangerous unless you compesate for the problem. I will take it to the dealer this week and see if they can reprogram with the new program that has been reported but not verified.

    It reminds me of Toyoto problems and could be just as dangerous.
  • bwiabwia Boston Posts: 1,163
    edited February 2011
    During the last 4 weeks the winter weather has been brutal in New England and as result gas mileage has suffered. Despite using Shell V-Power 93 octane during that time my mpg has dropped from a high of 20.1 to a disappointing 17.6 mpg (all city surburban driving). These were manual calculations so the measurements are pretty accurate.

    Meanwhile, my CSX has been flawless as I approach 5K miles in seven months of ownership. On Saturday I will be taking it in for my second oil change and first tire rotation.

    Surprisingly even with all that snow the interior floor mats and carpeting have remained relatively clean. This is due to the fact that I drive from my home garage to an indoor parking garage at work. To keep the exterior clean I have been using the automated “brushless” car washing places. They wash both underneath and the exterior without touching the car. I must say they do a good job as the car comes out as clean as from a conventional car wash. My concern, however, is that the high water pressure might affect the paint finish or enter the car through small crevices. But the seals are tight and so far no water intrusion.
  • crankeeecrankeee Posts: 297
    edited February 2011
    cooley: we just got back from 1500 mile road trip with 2010 CXL 3.0L and FWD only. Best mileage 29.1 at 75 highway only no air 2 adults. Worst 25.5 at 80+ when possible and safe. Speed is the biggest factor IMO. The shifting on the Lacrosse is programmed for mileage NOT performance. Big grades will result in one or two downshifts with the 6-speed trans trying hard to upshift for mileage maximum. If you keep your foot on the accelerator the trans on ours keeps it in the lower gear- if your let up it upshifts per the program preference for economy. Also we use the manual tap up tap down on BIG hills to avoid upshift and searching. If you got 28 MPG on a 4400# car the trans is operating great. The searching and downshifting is an algorithim built into the program. Corvettes have just the opposite as do most performance cars. Cadillacs with same engine you have drive differently due to program set for performance NOT mileage.
    I suggest practice driving with the manual shift on hils and you will love it.
    28.2 MPG is outstanding with any car!
  • crankeeecrankeee Posts: 297
    Bwia: We get less than 20 in town driving with 3.0L 2010 CXL. Sticker shows 17 city 26 highway for ours so the actual is a little better in town and MUCH better on the highway, Same as youe actual experience methinks.
    Also the paint is not affected by water pressure. Washing the salt off is the best thing you can do for the carbon steel components, mostly under the car and in the engine area. Automatics wash the under side also so they address that concern. We use after market rubber mats over carpets to save the good looks from the flotsam and getsum of winter.
    Our recent 1500 mile trip from south to north was flawless with mileage from 25.6 to 29.1 depending on speed mostly. The 3.0L & 3.6L engines "like" 87 and higher octane gas- we use midgrade that halps the mileage on the highway and affects it little in town. Enjoy the great car!
  • cooleyddcooleydd Posts: 105
    edited February 2011
    crankeee: I can be on level ground and want to speed up to pass and there is hesitation and no speeding up. Does not down shift to give me the extra needed. I keep pushing on the petal and no response. Finally I can get it to downshift and speed up but it is simply not right. I guess I need a program based on performance - I will sacrifice the MPG for what I feel is a safer operation. I do use the manual shift for hills.
  • I would like input from other Lacrosse CX and CXL owners with the 3.0L V6 engine.
    If you have your LaCrosse in park and get the RPM's to 1500 - 2000, does your car start to shake?
    I discovered this one very cold day last week while I had the RPM's around 1500 for a few seconds. All of a sudden the car started shaking. It's hard to keep it in that range but I would be very interested to know if others are experiencing the same thing?
    Please let me know what you discover.

    2010 LaCrosse
  • e_net_ridere_net_rider Posts: 1,380
    So the 3.0 does it too. My 3.6L does it at around 1500 and if cold it sometimes idles up to that RPM and shakes.
    I really would like to know why.
  • Is yours the AWD? If so, have you had it back to the dealer for the vibration fix for AWD's?

    I'm glad to hear from others that have the same problem. For a while I thought I was the only one.

    2010 LaCrosse
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