I had em on my 97 Suburban and hated 'em, so I found out how to disconnect. They prematurely fogged/faded the headlight lenses because of the heat I guess. You could clearly see the area in front of the DRLs was totally clouded compared to the area just to the side of it. Just a waste of energy in my opinion. But, to each his own.

 

I am looking for the DRL control module 2C3Z-13B218-AA. My 2005 did not have it installed and I would like to find one to install. This is an obsolete part and I'm looking for one to purchase. This would be remote relay box #2.