I always get flashed by other cars but only when I have my fog lights on. I play with them and it seems like they are pointed up too high. Buildings and trees just light up too high vertically. So last night I was comming up to a truck whose fogs were blinding me. As I passed it I noticed that it was a VHO. A black one in Pflugerville so if it was you speak up. I think I will try to re-aim the fogs. Not sure how to check if the headlights are good or not, I think they are fine though. Here is what I think is going on. The headlights are adjustable and the fogs are not. The fogs are mounted to an airdam that was designed to be on a truck that is 2" higher in the back than the front. The VHO truck is of course level. The headlights were adjusted but the fogs were not.
Any ideas?

 

It's not just VHO's, I get flashed all the time when mine are on.

 

You need a 5/32" allen wrench to adjust them from bottom of the foglights. I tweak mine all the time, I have 7500K bulbs and they just plain blind you.

 

 

No problem on my Sierra yet. I'll run them the next couple of days and see what happens.

 

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Looks like your GMC is set up different that the silverado.