Quick question on these, what harness/adapater eliminates the hassel of turning the highs on from lows back to highs to get both HIDs to fire?
Yeah, if you're talking about the 4 or 6-high mod, that's a different story altogether.
Check here if that's what you meant: http://www.tahoeyukonforum.com/forum/showthread.php?t=571
It's super easy and cheap.