How to Aim Your 2004 GMC Sierra Headlights Correctly gzmorsunled.wixsite.com

Measure the Height: Open the hood and look at the plastic lens of your low-beam headlight. You will see a small circular molded mark—this is the "aim dot." Measure the distance from the ground to the center of this dot. Write this number down . Mark the Wall: Go to the wall and measure up from the ground to the exact same height as your aim dot. Use painter's tape to create a horizontal line across the wall at this height. Make it long enough to span the width of your truck .