One problem related to transmission noise has 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 purchased the Impala on June 16, 2014, there was some popping noise from the dash board on the passenger's side. The sale's manager had me bring the the car in for repair the next day. The car was repaired within 2-3 days. I found out it was the accuator sensor. In January 2015 the transmission had to be relplaced. Luckily it was under the powertrain warranty. Now 8 months later to the date (March 12, 2015), the stabilizer track-engine reduce power light and message came. I came to a stop. Cut the car off for 15-20 minutes only for the light to reapear after moments of driving. I got to work. The car sat for 9 hours and still the light illuminated immediately upon starting the car. I found out it is the same problem and the extended warranty does not want to cover it. I am at my wits end and now the finance company wants me to continue to pay my monthly car note for a car that is not totally drivable. . . Why??? gm should pay!!!.