One problem related to battery dead has been reported for the 2009 Chevrolet Impala. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Chevrolet Impala based on all problems reported for the 2009 Impala.
While driving on the highway the vehicle would display engine reduce power message then the engine would reduce power and stop. I took the car to the dealer on 12-21-15 with 118755 miles they said no codes. I stated the battery died they said bring it back k if it does it again. I took the car back on 3-17-16 123236 miles the code was in the system but they said it is not covered now over the miles. I called gm on 3-17-16 they said they would look into it and call me back. Gm called back and said they can't help me( case # 8-1882923571). I asked when the notice went out and he said he didn't know. I think this known safety issue should be covered. The dealership was chuck nicholson GMC dover ohio 330-343-7781.