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'07 denali XL light bulb type?
what type of bulb do these things have? 9003 or is it a H11 ? it's a single bulb with dual filament;
also, i need to be able to permanently turn off the DRL; is it possible by programming? otherwise the HID ballast will get low power and just flicker the HID Bulb constantly, unless you turn the low beam ON fully....
had a 9006 HID and it was GREAT; much brighter....
07 denali XL