2010 Buick Lucerne throttle problem

2010 Buick Lucerne throttle problem

Posted in the Buick Forum

Richard Baner

Mossville, IL

#1 Aug 17, 2010
I took my new 2010 Buick Lucerne in to my dealer with three problems with the accelerator/cruise control. If I set the cruise at 65 mph speed limit and start up a long grade the car will gradually slow down and then grab ahold and speed up to the point that when I get to the top of the grade I am going 5 mph over the speed limit. Second, when on level ground and I want to increase speed pushing on the pedal produces no increase in speed whatsoever for 5 seconds even when pushing farther on the pedal. Third, when on level ground and I let off the pedal slightly if feels as though the engine is missing. I have been driving buicks for over 30 years and never had this problem with any of them. The dealer says that it is some kind of new electronic throttle and that is probably just the way it is going to work in order to save on fuel mileage. I should have kept my LeSabre that got just as good mileage and had no similar problems. Any ideas?
Tracy Hopper

Greensboro, NC

#2 Dec 26, 2011
I purchased my wife a new 2010 Lucerne. She complained about the cruise control. When in curise at approx. 45mph, going down hill the speed did not gain much. However, when starting up the hill, it's as though the engine "re-engages" and abruptly accelerates, drops to a lower gear and continues to accelerate beyond the set speed. Action is so abrupt that it's very concerning! Service Mgr. at dealership told her he could not get the car to do it on road test. I told him the exact cercumstances. After a full day, he called and said he had witnessed the issue.He then talked to Buick engineers and was told that it is a "design system." After driving the car for a year, I too have noticed that when I am required to slow (for a turn at intersection or RR crossing) when the accelerator is depressed, there is a hesitation, then car lurchs forward, when the engine "re-engages."
If in fact this is a "design" it not a very good one!
All the controls are electronic and there should be a recalibration to correct this. Currently, there dosen't seem to be one.
Richard Baner

Mossville, IL

#3 Dec 26, 2011
The problem I had when the car was new, overaccelerating up hills, which I was told was just the way the car was designed and I would have to live with it, has now gone away by itself so I guess it is not designed that way as claimed. It still does the hesitation business two years later so I guess I will have to live with it. I drove buicks for about 40 years straight but this is the last one other than my Reatta which I will drive until it drops. dick baner
Tracy Hopper wrote:
I purchased my wife a new 2010 Lucerne. She complained about the cruise control. When in curise at approx. 45mph, going down hill the speed did not gain much. However, when starting up the hill, it's as though the engine "re-engages" and abruptly accelerates, drops to a lower gear and continues to accelerate beyond the set speed. Action is so abrupt that it's very concerning! Service Mgr. at dealership told her he could not get the car to do it on road test. I told him the exact cercumstances. After a full day, he called and said he had witnessed the issue.He then talked to Buick engineers and was told that it is a "design system." After driving the car for a year, I too have noticed that when I am required to slow (for a turn at intersection or RR crossing) when the accelerator is depressed, there is a hesitation, then car lurchs forward, when the engine "re-engages."
If in fact this is a "design" it not a very good one!
All the controls are electronic and there should be a recalibration to correct this. Currently, there dosen't seem to be one.

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