location of diagnostic port on 2007 Chevrolet Impala

My check engine light went on and I do not know why. Looking for the diagnostic port, can you tell me where it is??

Asked by for the 2007 Chevrolet Impala
These are most frequently under the dash and one side of the steering wheel. It may tell you where in your owner's manual. If not, I would find an Impala fan forum or subscribe to