I recently added LED eyebrow to my Gen2 Volt.
I purchased a amber sequential, White LED 24inch strip and then found Molex MX-150 8 position male/female connectors. i created adapters to the headlight assembly wiring, making this truly plug and play, no mod to wiring harnesses.
Link to the LED...
Parking lights on - I previously installed LED switchback parking/turn signal bulbs
with headlights and turn signal on
I purchased some of these White Led 23" strip with sequential Amber on Amazon. There are many sellers now.
I double sided taped them to the top of the headlight fixtures...