Headlights Not Working on 2001 Chevrolet Impala

The car has auto headlamps, they turn on & off automatically. We can not get the headlights to turn on, we have running lights. I have checked the bulbs all ok, I tried to turn on manually buy the switch. I wasn't sure if there is a module or someting I can't see that is bad? Has anyone else had or having this problem,or any suggestions. Thanks "BLIND IMPALA"

Asked by for the 2001 Chevrolet Impala