Re: day time running lamps on 2011 GC Overland
It is part of the US National Highway Transportation Safety Administration Regulations for Vehicles.
The deactivation of the daytime running light is only a requirement if the distance from the edge of the DRL and the centre of the turn signal are within 100mm (about 4 inches) of each other. That's why it is not always done on different vehicles.
2011 GC OL, Natural Green/Frost, QL, ORGII, 430N, Pano, GY WSA