One problem related to headlight switch has been reported for the 2005 Chevrolet Colorado. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Chevrolet Colorado based on all problems reported for the 2005 Colorado.
Left turn signal indicator on when headlights are on. Activation of left turn signal causes both front turn lights to blink, and all four rear tail/turn lights to blink. This might be due to turn signal switch, or multifunction switch failure.