Two problems related to wiring have been reported for the 2011 Chevrolet Impala. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Chevrolet Impala based on all problems reported for the 2011 Impala.
I noticed my rear defrost has quite working. I figured it was a fuse so I wasn't to worried about it. We've had a lot of snow recently and figured I better check my fuses. The relay is working that is located under the hood. We traced to wiring through the fire wall and down to where it comes into the vehicle (down by your feet). There is a wiring there and once we disconnected it we noticed it is burnt very bad. Where the two pieces connect together is melted and is black. This could have been extremely bad if it would have caught fire.
My son while driving highway speeds 60-70mph, the car display would say "reduced power" followed by "service stabillatrac", "service traction control". Shutting car down at highway speeds. Shut car off for 5-10 minutes and would b fine for a week, a month, six months!!! this has been going on intermittently for over a year!! car not under warranty and cannot afford to take to dealer every time it happens, needless to say no one drives it but me. Have not taking to dealer because research online and nothing seems to be a sure fix!! other people are replacing throttlebody,s, gas pedals, gas caps, abs sensors, various wiring harnesses, batteries, grounds, computers without any of them being a sure fix. Someone will or may have already been killed by this malfunction and unfortunately did not live to say the car did this!!!! I know from reading online forums and the such that this seems to be a very common occurance on multiple years of this model!! all of this on top of a $2 key switch fix that took how many to die before anything was done!!!.