One problem related to fog light switch has been reported for the 2003 Chevrolet Impala. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Chevrolet Impala based on all problems reported for the 2003 Impala.
Recurring problem: when clicking from low beam to high beam or high/low using the turn signal arm the headlights go out unexpectedly. I've been forced to travel with the fog lights on to insure that I have some vision when switching high/low. Extremely dangerous to be traveling at highway speed and losing your headlights! I have found over 30 similar complaints on-line without to much searching effort. Many of the respondents have said that repair/replacement of the turn signal arm runs about $700. In visiting with my dealer he has indicated he has not heard of this problem--but my research indicates it occurs often? the most recent incident occurred in late Dec. 2009. We are hesitant to use this vehicle after dark due to the problem.