How do you change headlights on 1999 GMC suburban?

To change the headlights on a 1999 GMC Suburban, first, open the hood and locate the headlight assembly. Remove the retaining clips or screws that hold the assembly in place, then gently pull the assembly forward. Disconnect the wiring harness from the back of the bulb, remove the old bulb by turning it counterclockwise, and replace it with a new bulb. Finally, reconnect the wiring harness, secure the headlight assembly back in place, and close the hood.