Anyone know how to do this? My friend has an 03 silverado and we're wondering if there's a way to leave the low beams and fogs when you change to high beam? How to have all the lights on low, highs, fogs????

 

Click this I'm sure there are more options but that's one!

 

There is a junction or harness connector under the steering column. You only have to use 2 12V diodes to do it. I did it to mine and it works flawlessly. Do a search for headlight mid or something like that to find the exact instructions.

 

Check this link. I did mine just like this. $1 in parts and 5 min install
https://www.performancetrucks.net/fo...+headlight+mod