How do you turn on running lights on 2004 gmc?

To turn on the running lights on a 2004 GMC, simply ensure that the vehicle is in the "On" or "Run" position. Then, pull the headlight switch knob located on the dashboard toward you until it clicks, which activates the running lights. Make sure the vehicle's parking brake is released, as some models may require this for the running lights to function. Always refer to the owner's manual for specific instructions related to your model.