2011 Chevy Impala - Service Stabilitrak - Reduced Engine Power
As I see on the forums there are many issues with what seems to be the Throttle Body, sensor etc.
Here is my wonderful story and I will be updating regularly in the next few days. I will add that I commute at least 2 hours per day and rely heavily on my car for work and to take care of my 2 children - 1 of which is special needs.
2011 Chevy Impala LS
61K miles (90% of which were highway)
Running full synthetic oil - changed every 5-6K miles
Left work last night and not driving for more than 30 seconds when the engine light came on followed quickly by what can only be described and mild to moderate jack hammering of the car and the reduced power to engine message.
I pulled over, checked the manual - then Google/Edmunds which brought me here.
I got a ride home after securing the vehicle and came back this morning. Got it towed to the dealership and was told that it was out of bumper to bumper warranty and that it wouldn't be covered under the Powertrain warranty if it was the throttle body or any of the associated sensors.
I'm currently awaiting the call back from the dealership regarding the diagnostic result ($125) and will post everything as it becomes available in an attempt to help anyone else having a similar issue.
It's a shame too - after the research I had done on this car I thought it would be more reliable than my old 2005 Ford Focus. But since May 2013 I've now been left dead by the side of the road twice... first time with a blown thermostat!
So - as I said - waiting on service calling me back. I've also taken the liberty of emailing [email protected] with the details of the vehicle. I'm trying to take a positive approach to this in the hope GM customer Service will pull through for one of its customers... I can only hope they do!
Good luck and safe driving! Updates coming soon!
See Also: Chevrolet Impala LTZ 2009. Accelerator pedal position sensor replacement! Easy Fix!
So I sent a little email to GM regarding this issue and my situation.
90 minutes after sending the email I received a call from a GM customer service rep that passed me through to a district agent. Linda (the agent) was exceptionally nice, took the details of the issues I'm having as well as previous issues with the vehicle (blown thermostat), contact info for the dealership/service center I dropped the car off at etc.
She said she'd contact the service center directly to follow through and see what could be done with my case.
Upon hanging up the service center called and confirmed that it is indeed the throttle body, that it isn't covered under the 5 year/100K powertrain (as of 2010 on all models apparently) and that it would be $650 out the door for parts & labor.
At this time as I need the vehicle I've approved the work and will be picking it up on Saturday as I'm currently travelling for work... more updates to follow!
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Follow-up as of today (Day 3)...
No return call from the GM district rep but got a call today to say my vehicle had been repaired, that the GM rep had called the shop directly and that GM has discounted the cost of the repairs.
Initial cost was an even $650 + tax ($679)
Discounted cost is $571.98.
At this point I'll be forking out the money as I need my car back. Not sure if anyone else has attempted to contact GM with any similar results - would be good to hear from you if you did!
My wife's 2011 Chevy Impala 3.5l. I've been having the same issue with my car (service stabilitrak, traction control, engine power reduced).
The problem is the car is a "drive by wire" car meaning there's a sensor on ur pedal the communicates with the sensor on your throttle telling it where the pedals at and how much to open the throttle. Both sensors are prone to going out and even once replaced the replacements normally only last 2-4 yrs. I know all this cause my buddy is a GM mechanic. I went to local auto store and purchased both parts and replaced myself for roughly $200 something dollars compared to there $1100 dollar job. My buddy told me the GM parts have a chance at lasting a little longer but for that price I could replace them myself 3-4 times with auto zone or advance auto parts or oriellys equivalent. So if your mechanically inclined that's the best route. They need to fix this issue cause it makes me irritated when stuff like this goes unsolved by a leading company. Now on another note my 2012 camaro is having the same problem. I mean seriously GM get on your stuff and do something.
I'm not sure if you're still having issues with this but I have the same problem. We should all report the issue to http://www.nhtsa.gov/ to make GM pay for the faulty issues. Hope this helps!
Do you have any update on this? I have the same issue as many others do with this car but GM refuses to help or acknowledge that this is an ongoing issue on this make/model of car. I reported it to the NHTSA in hopes that others have done the same so that this vehicle can get recalled for this part. Were you able to get it fixed somehow? Thanks!
Since you are saying that the car failed to stop and you have very little brake pedal, STOP DRIVING THE CAR until it is repaired correctly. This isn't about whether there is a warranty or a recall, this is about responsible ownership and operation of a machine. Since the brakes are not working correctly, the vehicle should be towed to a shop to have it looked at and repaired. Without looking at this and proving what is going on, anything that anyone would say would be a guess and guesses are more likely to be wrong than right. But the first guess or impression is that you have more than one problem with the car, the first of which is a brake system issue that is causing the low pedal and inability to stop. Once that is dealt with then whatever is left (if anything) can be attended to.
I'm beating the drum to bring others into this practice. Stop using Ethanol-laced gas. I believe it is killing our engines.
The first time, 15 min after that message appeared, the car powered off; so No power brakes, No power steering, No lights. I learned if you pull off and let the engine cool, you can drive it again. Te codes all go away, even the check engine light went out. No need to panic and call a tow truck. A new throttle body (comes with position sensor) costs around $150 at a parts store and is super easy to install and only took 10 minutes.