I've seen some with a torx head and others with a Phillips head. The adjuster is in the notch of the grille behind the turn signal lamp

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I have read somewhere, that you should be on level ground.
remove your grill, this may be required, however, I had my grill previously removed. After opening your hood, then behind the turn signals, about 6” below the turn signal light, On each side. I had a thorx adjustment screw.
Place your truck appx. 20’ from a wall and adjust your lights until the center of the headlight beam is about 4’ high. You can mark the height with tape. Reinstall any items removed. It’s that easy. I used a 1/4” ratchet, a 6” extension, and a thorx socket. Can’t recall what size the thorx socket was. Good luck.

 

How to: Adjust Your Headlights Vertically

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Thanks. I was looking for the Torx size or Allen key size. I knew the rest as it is pretty standard.

 

(Year Dependent)
Torx T15
or 2.5 Allen Key

 

I have an 07 colly, and it has a torx type head on it, but a 6.5mil socket works perfect on it