Well, I just read through the better part of all 104 pages. I just purchased a 2015 Sierra DC. Last night was dark and rainy...to say the headlights sucked would be an understatement. My trucks build date was 8/19/15, so that means there is no need to flash the computer. It does have the Phillips bulbs in there, it sounds like the Vosla will help at first but will dim over time and they will not last anywhere near as long as the Phillips. It sounds like upgrading the fog lights and then doing the fog/high beam mod is the best solution right now!!! Am I missing something?????