I have a 2wd 2 Door 1999 Tahoe. I bought a set of genuine GM headlights and parking lights and just had them installed a few days ago. The beam patterns look horrible. Anyone have any idea on why the beam patterns look like this? I have attached pictures. The first two pictures are low beam and the last two pictures are high beam. The bulbs are Sylvania XtraVision 9005 and 9006. Any help would be greatly appreciated. Thanks in advance.

 

Is it maybe the actual light housing that is messing it up and not the light or position? I've never seen that before but if you don't have glass headlights, it may be worth looking into.

 

I have no idea what’s going on. I purchased a set of Anzo headlights at first and the beam pattern on them was way worse. They couldn’t even be adjusted. So, I sent them back and bought the ones I have right now, which are genuine GM headlights made in the USA. I cannot figure out why the beam looks like it does. It is puzzling. Thanks for your reply.

 

I would put a stock bulb in there just to compare and see if it's better or what changes. It may be the bulb's positioning inside the housing

 

What do you mean a stock bulb? The bulbs that came with the headlights are also Sylvania brand. Are you referring to those? Thank you.

 

That's my bad. I think in my head I was assuming you had not had halogens. If you already had tried other headlights, maybe just a different set of bulbs in there would show a different pattern? At this point I don't know other than wiggling the bulb to see if the pattern changes before completely securing the bulb.

 

Looks like they are upside down and reversed.

 

OK, thank you.

Is that even possible? I thought they would just go in one way.

 

Check the lettering on the front of the lenses to make sure it's not upside down. It's been a long time since I've had my '99 Yukon.

 

Yea, the lettering is right-side up. Thank you.