How to replace headlamp

I believe if you look at the top of the headlight, towards the back there looks like there are 2 squares. The squares are actually the top of the slats which hold the headlight in place. Pull up on the squares; the headlight assembly should then pull out the front of the truck. Disconnect the bulb, remove the lock ring(if there is one) by twisting it counter clockwise and then pull out the old bulb.

It's very important that you do not touch the replacement bulb with your bare hands; the oil from your hands can cause the filament to burn out. Grab it only by the connector or by the coating on the tip of the new bulb. If you already touched it, wipe it off with alcohol and let it dry.