For 04+ gm model's, unplug the sun load sensor for the auto headlamps. Plug a .5 Ohm resistor in place of the sensor, or find the wires at the bcm and tap the resistor in there and cut the leads to the sensor.
Hid and drl would be just fine using a relay harness. The relay harness will take low voltage signal and use a fused direct 12V connection from the battery.
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