GMC Troubleshooting Questions? Ask a Mechanic for Answers
I am looking for an image. You may need to removed the plastic cover above the radiator to access the adjusting screws. I do not recall if there are holes in the plastic cover to access the adjusting screws. You will need a Torx E8 socket to turn the adjusters. If you look down behind the headlight you will see the head of the adjusting screw. Both the up/down and the left/right screws are there.
I will keep looking for an image.
If you have any other questions let me know.
You are welcome.
Please take a moment to rate my service so I can get credit for my time, the question remains open for follow up even after doing so, all you need to do is return to this question if need be.
Thank you again.