Last night on the way home from a friend's house, I noticed that my headlights were shining really high, so I decided to adjust them today per the procedure I found online.
The procedure I did was pretty simple.....
- Important: Find a level surface where you have a flat vertical wall (garage door, etc.). Park your truck approximately 25' (distance from headlight to wall) from the vertical surface.
- With your low beams on, measure from the ground up to the center of your low beams right at your truck for both sides. (Note: should be close to same height with someone in the drivers seat)
- Shine your low beams at the wall (25' away), and you will be able to see the top edge of the light from both the left and right headlights. Measure from the floor up to that top edge of light for both sides. This measurement will be approximate. It is hard to get exact. Just try to measure to the same location for both sides.
- The correct height should be 2" to 2.5" lower than your measurements in step 2 above.
- For the K2 GM trucks, lift the hood and the headlight up/down adjustment screw is located looking through an open hole in the plastic shroud directly above each headlight assembly. It has a white plastic head with provisions for using a Phillips-head screwdriver. I took a black sharpie and marked the 12:00 position so I could accurately count the number of revolutions I made during my adjustments.
- Turning the adjustment clockwise adjusts the beam down, so turning it counter-clockwise adjusts the beam up.
The following was what i measured for my truck after the leveling kit and larger diameter tires....
- Center of low beams measured at truck: Driver Side - 44.25" Passenger Side - 44"
- Initial measurements at wall 25' away: Driver Side - 47.5" Passenger Side - 47"
- Number of full clockwise turns on adjusters: Driver Side: - 2 1/2 turns Passenger Side - 2 turns
- Final measurement at wall: Driver Side - 42" Passenger Side - 42"
I will check this tonight to make sure I have good road coverage and adjust again if necessary.
Edited by MacA, Yesterday, 12:43 PM.