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I’m a GM supporter. I have owned Chevrolets since my first car as a teen including Beretta’s, Malibu’s and Impala’s. I endured 15 mpg with a new 1975 Buick Electra Limited for the sake of safety of my young family on long family trips. I’m on my 5th Corvette. I have worked for dealerships of every GM brand. I taught automotive tech for 15 years. I think I’m qualified to make an assessment on the performance of an automobile. I recently purchased a new Lacrosse AWD for my wife since the all-wheel-drive is a desirable choice here in the Midwest. I chose the Lacrosse first because it’s a GM product. Secondly, the Lacrosse’s appearance and style are very appealing, and thirdly, the AWD was the determining factor. Buick has built a huge looming fault into the Lacrosse. The transmission shifts points are set between 4,000 to 5,500 rpm. After driving the car for several months the engine noise of high rpm at every shift point is highly uncomfortable to my senses. Accelerated engine and transmission wear will result from years of this continued high rpm use. Excessive engine rpm is killing the gas mileage. My complaints to Buick through dealerships and Buick’s Customer Service line result in the same excuse: “Transmission is shifting to factory specs.” The “factory specs” are wrong! Ignoring customer complaints, and there are plenty out there and growing, is sabotaging the reputation of this model Lacrosse. Buick’s indifference to this problem is baffling since a probable fix is a reprograming. As of now, I’m regretting this purchase and re-thinking my loyalty. Shame on you Buick!
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@VetteDriver First, allow me to welcome you to GM Authority. So, welcome!
Secondly, what you mention is rather intriguing. At this point, I’ve driven two AWD LaCrosses and one Cadillac XTS4 (same vehicle architecture as the LaCrosse), but didn’t pay any particular attention to the shift points of the transmission, probably because it didn’t strike me as being in any way “incorrect”. But that’s not to say that there isn’t something to be improved.
Here’s my question: is the shift point a constant 4,000-5,500 RPM, or does it change based on different vehicle/engine load? So when the throttle isn’t floored, would it shift earlier?
Alex
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We apologize for the frustrations. Do you have a case number regarding the concern? I will be more than happy to look into it for you.
Brandon
GM Customer Service -
Alex, there is no need to floor the accelerator. If you are on a residential street, speeds of 20 – 30 mph, the car will shift when you reach that speed because you lift. First gear reached that speed before the 4,000 rpm shift point. When you accelerate into higher speed traffic the car shifts at 4,000 rpm, again, until you reach the speed limit and lift. Accelerating into highway traffic with more accelerator input the shift points hold until 5,000 to 5,500 rpm’s. I have tested it from spotlights in town traffic, purposely keeping pace with the vehicles around me and the car doesn’t shift until you reach 4,000 rpm while other vehicles shift up normally. I have “manually” shifted the car at a reasonable 2,500 rpm and the shifts are smooth, so the engine has plenty of power to continue to climb in speed. The accelerator is not being “floored”.
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