I was having the same problems with my 06 Equinox LT. The ABS T/C lights were coming on usually after a speed bump in my neighborhood or while driving under 20 mph. Brakes grabbing and grinding when braking. Twice during heavy rain the car made a loud roaring noise and would not accelerate. My brakes and rotors had been recently replaced when my problems started at approx 65,000 miles. My husband started by replacing the front left sensor,$125.00 same problem not fixed. Then Pepboys did a diagnostic and replaced my front left hub - $625.00. I thought it was fixed till 250 miles later the lights came back on. They agreed to refund my money - WOW! Then took it to the chevy dealership and they did a diagnostic. This is what my paperwork says. It came back with codes C000,U2100, U2105. Indicating that the ECM was giving no or incorrect information during the diagnostic. The dealership replaced the ECM. Somehow it was under warrenty because the replacement fell under some emissions warrenty. IDK. I am at 260 miles and I hope the light doesnt come back on. I really can't afford to try to chase this problem. Maybe this ECM replacement is the key for your ABS T/C light issue.

Update: 750 miles and no ABS T/C light on. The ECM replacement must have fixed it. Now my heater core is broken. I'll keep an eye on the antifreeze levels, but I am not fixing it. I'll be trading this SUV in as soon as I can. It's too bad it starting to have these expensive repairs at only 65000 miles. I liked the car for the most part... other than the bad turning radius.

 

for AMS.
Thave them replace the wiring harness.that fixed my problem. it wasnt the hub or sensor. ny lights havent turned back on since they replaced the wiring harness. hope this helps

 

Not sure if I have the same problem... anyone have thoughts:

This is the exact situation that happens almost every time I brake:

The brake pedal begins to stiffen at 5 mph and only at 5 mph. If I gradually brake and can 'skip over' 5 mph, the pedal doesn't get stiff. This happens both in drive and reverse. It almost sounds like something is grinding or stuck, but its hard to really put the noise into words. I'm still able to brake but it's just a little harder to do so because of the pedal getting harder to push. Again, it only happens at 5 mph; no other speed which is pretty strange in my opinion. No ABS lights, etc come on either.

Thoughts? Advice (besides going to a mechanic)?

Thanks in advance!

 

<!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:PunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> <wontGrowAutofit/> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> </w:WordDocument> </xml><![endif]--><!--[if gte mso 9]><xml> <w:LatentStyles DefLockedState="false" LatentStyleCount="156"> </w:LatentStyles> </xml><![endif]--><!--[if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} </style> <![endif]--> I am sorry to hear of your brake pedal frustrations. Unfortunately, the problem you have described could be caused by a few different factors. I know you said that you didn't want to go to a mechanic, but I would suggest visiting your local dealer so they can pinpoint the problem by running a diagnostic test. If you have any further questions, please feel free to message me.

Louis
GM Customer Service

 

There are good technicians out there that can fix cars as good as or better than then dealer

 

There is no doubt I need to go to a mechanic; however I'd like to see if anyone has thoughts on potential causes before spending the time & money for diagnostic tests. What are the potential causes you are referencing?

 

<!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:PunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> <wontGrowAutofit/> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> </w:WordDocument> </xml><![endif]--><!--[if gte mso 9]><xml> <w:LatentStyles DefLockedState="false" LatentStyleCount="156"> </w:LatentStyles> </xml><![endif]--><!--[if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} </style> <![endif]--> I am sorry, but I cannot diagnose problems over the internet. That is why I suggested visiting your local dealer. I don't want to offer incorrect possibilities. The dealer should be able to pinpoint the problem much easier and with better accuracy.

Louis
GM Customer Service

 

I sure he can not diagnose it at all. He is most likely a suit that never worked on a car. Sent here by GM to drum up business for dealers. You most likely have an ABS sensor dropping out which makes the ABS computer think the wheel is locked up. No ABS light because it does not know anything is wrong.

 

Thanks. What's average cost of the fix for that?

 

Depends on whats wrong anywhere from $200-$1000. No way to know until somone looks at it