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Anyone know where to start checking, I have a 2013 lml and since I installed tunes my driver's side headlight and driving light flash with the driver's side blinker. Not sure if it has anything to do with the tuning or something else. HID's with ballasts in the headlight LED driving light and LED switchback blinkers. Everything worked as they should before the tuning. Motor Ops tunes and they say they have not had any trucks act this way after tunes.'dunno;
 

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I noticed strange things after I installed LED bulbs in the turn signal spots. Certain LED bulbs do not fully isolate the turn (bright) and driving (dim) circuits like an incandescent bulb does. This causes current to bleed from one circuit to the other, which then caused strangeness. I used diodes to prevent the bleed, it all works properly now.
 
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