Hello. I have a 2012 Chevy Impala LT, 3.6L V6. It has roughly 35,000 miles on it. Occasionally when I hit the brakes I get a Stabilitrak Error Message "Service Stabiltrak". When it happens the odometer needle fluctuates and the power locks engage/disengage. Some days it won't happen at all. Other days it'll happen almost every time I hit the brakes. Someone mentioned ot have the front wheel sensors (speed and abs sensor) looked at. Would appreciate any suggestions for where to start. Thanks.

MrRobinson
180

Asked by Apr 06, 2013 at 03:04 PM about the 2012 Chevrolet Impala LS Fleet

Question type: Maintenance & Repair

25 Answers

tenspeed
81,415

Since it's a relatively new car and it should have some sort of warranty, take it back to the dealer. It may be a known problem and they can fix it. When the speedometer needle dancing and locks cycling, it sounds like a lack of 12 volt power to them when the brake light bulbs are energized.

2 out of 2 people think this is helpful.
Js08016
48,075

Sounds like a problem with the BCM (body control module). This is the onboard computer that controls your power locks, lights, even the horn. Since the car is only a year old & has less than 36,000 miles on it it should be covered by new car warranty. HTH. -Jim

2 out of 2 people think this is helpful.
Joe Bartlett
655

you need to get the ebcm reprogramed for this condition,should be cover in your warranty at a gm dealer

MrRobinson
180

Hey thanks guys. I just got back in town yesterday since I posted the question and noticed the service brake assist message as well. So when I hit the brakes I get "service brake assist" then "service stabiltrak" while the speedometer needle fluctuates and the door locks cycle and i believe the radio turns off for a second then back on. I'll definitely take it in and have them look into the BCM. Thanks again. Also, I don't know why I said 2012, it's 2011.

3 out of 3 people think this is helpful.
Js08016
48,075

Check your warranty booklet. I believe GM still had 3 year/ 36,000 mile bumper to bumper warranty coverage in 2011. You may still be covered. HTH. -Jim

Shunnett
50

I have the same exact problem with mine, except the air conditioning goes out as well! What ended up being the problem with yours! I'm thinking about replacing the BCM.

2 out of 2 people think this is helpful.
Shunnett
50

I had the car on the computer & the following codes came up; U100, U0140, U0101, P0575, P069E, P0700, & U7300. They are uncertain about what it is and feel that it is either the BCM or the sensor in the tire/bearing. But the sensor shouldn't knock out the A/C, the bouncing speedometer, or the radio. With mine, it seems like it only happens when it's been sitting in the hot sun. Chevy dealerships state that they're not aware of this being a problem, and replacing the BCM is their best guess. They said it "might" just be a loose ground wire...another mechanic said it could be the ignition switch....oy vey!!! I don't really want to waste a lot of money on what it "could or might" be....

3 out of 3 people think this is helpful.
Amanda Bishop
160

I also have a 2012 Chevrolet Impala LTZ.. i purchased my car last november fron a used car dealer and it had $30,000 miles on it. I only had it for 3 months and it started making noises in the front left... sounded like a scraping/grinding noise and it only did it a couple times and went away. After about 2 months of intermittent noises the ABS light came on, the service stabilitrak warning, service traction control warning, and service brake assist warning. I took it to three different mechanics (2 of which are certified GM mechanics) and nobody had an answer. I finally found a trusted mechanic who dissected the problem and they told me i needed to replace the left front hub assembly becuz it was worn and cracked. My car does not have the bumper to bumper warranty any more becuz i have about 50,000 miles on it. This repair cost me $400! NOW i am being told that there is a defect in the ABS SENSOR MODULE which is not covered under manufacturer 100,000 mile warranty! This repair is approximately $450! WTF??! I am wondering if this is something I can wait to repair now that i am broke from the first repair??? i am not a happy owner of this car seems like there has been nothing but grief an i read alot about these chevy impala's having issues.

16 out of 16 people think this is helpful.
Js08016
48,075

Yes, the ABS module can wait. It will not effect your normal braking. However, the anti lock feature and probably the traction control, if equipped, will be disabled. So keep that in mind. If you have to panic stop you will skid. HTH. -Jim

1 out of 1 people think this is helpful.
MrRobinson
180

Hey guys... I'm the original poster. After taking the car to the GM dealer, the problem ended up being two wires were meshed together at the wire harness. They were the cause of all of the sensor issues. It was a $160 dollar repair. All has been great since. no issues at all.

14 out of 14 people think this is helpful.

Yes...for some reason the Engineers decided to go delicate...instead of HEARTY they could have used a 12V signal...but N000000, they had to use a "field effect" like from a transistor....light and flakey with a tendancy to get mixed in with the spaghetti~...just because the signals are minimal does not mean that the wires have to be minimal...especially in a clobber- abrasive environment with a lot of flexing and dust~...some people's kids, I tell ya~

1 out of 1 people think this is helpful.
Critter954
70

2012 Impala LT owner here...few months ago while backing out of driveway and leaving...slight grinding noise in front and stabilitrak light flickers. progressively got worse...called dealership and told I was "taking off" to fast! Yeah, right. Took car to dealer (only 24000m) and replaced right front worn hub bearing. All is well for about 2-3 weeks then the grinding started again....back to dealership...this time the right hub bearing.! You would think it would have been checked the first time. first day with both bearings replaced, ok. Then a small shimmy in front end...I'm thinking its the road I am on "NOT" has been 2 weeks and leaving for working this am... drove about 1mile and turned around. the pulsing and vibration in front end scared the bejeepers out of me...waiting for dealership to open to have towed. Only upside at this point is the warranty/ext warranty I have!

4 out of 4 people think this is helpful.
Critter954
70

Edit....left hub bearing change after the right one changed.

3 out of 3 people think this is helpful.
rasky1
20

2012 Impala LT. 57000miles. Wheel hub/bearings bad both sides. REALLY????!!!! Just dropped $650 on tires and alignment (that couldn't possibly be accurate with bad hubs), now dealership wants another $700+ to replace bearings and "realign" wheels. the only other car I've ever had with bearing issues had 200,000+ miles on it. Bumper to bumper warranty was gone at 36k, and the "power train" warranty to 100k doesn't cover this. RIDICULOUS, cuz I'm quite sure the "power" has to pass thru the bearings to get from the engine to the road!!!! (front wheels)

2 out of 2 people think this is helpful.
Nelson_1999
40

So I'm reading all your post, I bought my 2012 Impala used exactly 1 yr ago. I've been very happy with my purchase until about 2weeks ago. I keep getting the same info on the dash, it says Service Traction Control, Stabilitrak & Reducing engine Power. I took it to the dealership & they wanted $140.00 just to look at it. my warranty is up & this is not covered under my powertrain warranty. I have 90,000 miles. What should I be more cautious for Left/Right Hub or some wires?

4 out of 4 people think this is helpful.
Js08016
48,075

Check the wiring first that goes to the hub assemblies. They are always flexing and moving every time you turn the steering wheel. With that kind of mileage on a 2 year old car, is it a retired taxi? If so, it was driven hard! HTH. -Jim

Malissa Skinner Lewis
40

Ok so i have a 2011 chevey impala and i have 55,000 miles on it bought it used with 38,000 miles so now i was at a store today and come out and startred my car and the service tracktion control light came on!! Only had the car two years when i called the dealer ship youll never guess the warranty is up to! But to top it all off the defrost mount for thr rear windsheild came off the same day to the point if i turn it on it will spark!!! But yet to have them looked at they want to charge me 150.00 just to look at it!

4 out of 4 people think this is helpful.
jdrizzle
40

We have a 2010 impala that has been throwing the service stabilitrak, service traction control and engine power reduced warnings. Dealership replaced thr gas pedal. The throttle body was replaced and both front wheel speed sensors/hubs where replaced just today and the problem is still there. It actually is worse now. It all comes on as soon as you start the car

4 out of 4 people think this is helpful.
MrRobinson
180

@jdrizzle Have they checked the wires at the wire harness? A few wires were meshed together on my Impala. Once they replaced the wires everything cleared up. Haven't had any issues since.

1 out of 1 people think this is helpful.
input122
20

I too was getting Stabilitrak Error Message "Service Stabiltrak". and the engine said it was powering down. I took it to the local dealer they put it on the scanner and told me that it was covered under a warranty no charge to me my car is 2011 Chevy Impala LTit hasa hundred Seven thousand miles on it. they said it was actually in the gas pedal and they fixed it for free.

2 out of 2 people think this is helpful.
input122
20

when I took it to the dealership in the big city they wanted 140 bucks to tell me what the problem was but my local dealer small town 2500 put it on the scanner for free and fixed it.

idella84
50

So I have a 2013 Impala and the same thing started happening to me. Of course Chevy said my warranty is up and wanted 112.00 to tell me what was wrong. I took it to oreillys, he told me the abs sensor is bad. The guys at my parts store said it would be best to change the hub seeing as the sensor is located inside of it. Long story short I changed the hub on drivers side and paid $71.51for the part. So far she is driving like she use to!!

5 out of 5 people think this is helpful.
mjb27955
20

I have a 2012 Impala and started to hear the grinding noise coming from my front left. Thinking my break pads were worn, I replaced them and the rotors. Breaks looked good, but was happy to replace breaks. The noise continued whenever I came to a stop and then had to drive forward. A few days later, the Traction Control light came on. I turned the traction control off for the past two days, and I haven't heard the grinding noise any longer. I will definitely try replacing the hub and ABS....Thanks for sharing.

2 out of 2 people think this is helpful.
LeCartier48
0

2013 Chevy Impala, 75000 miles with the left front noise when turning left after backing. Chevy dealer replaced sensors, hubs( twice on left, once on right even though the noise was left front. Independent dealer charged 700 to change and look at problem. Still has problem, he says to drive it 100 and he will check the ABS. I think I just got kissed off.

Mike Carter
0

I am having the same issue. I have my mechanic looking at this. I advised him to check the ground wires... My warranty is up and Power train does not cover it.. this some bs that chevy will not cover this defect that obviously is an issue. I am waiting on my dealer to get back with me so I can let him know of this bs... and he asked me if I want to upgrade. Naw I may need to get a different car.

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