Head lamp change in a 2007 Denali XL?

To change the headlamp in a 2007 Denali XL, first, open the hood and locate the headlamp assembly. Disconnect the electrical connector from the back of the headlamp, then remove the retaining ring or clips securing the bulb. Carefully pull out the old bulb and insert the new one, ensuring not to touch the glass with your fingers. Finally, reattach the retaining ring and electrical connector before testing the new headlamp.