Headlight is a sealed beam, you have to replace the whole light. Easy job.
To remove, make sure you take the headlamp bezel off (2 screws above the headlight itself). You'll then see a metal bracket held in place by 4 Phillips (x-type) screws. You will also see 2 star (*) screws; these are beam adjustment screws and you probably won't need to touch these. However, if you need to adjust the headlamps after completed installation, please be careful not to strip or remove them.
Once the bracket is off, pull the headlight toward you and disconnect the plug. Replace the headlight, making sure that the middle prong of the connector is on top.
Replace the bracket and the bezel, and you're set.