When you are driving your GMC at night, the headlights are responsible for allowing you to see the road ahead and any obstacles that may be in the way. There are several different versions of the GMC headlight in use today, depending on the model of your vehicle. Older vehicles and even some newer vehicles may have the sealed-beam style. This type of GMC headlight incorporates the bulb, reflector, and lens into one single unit, and when the bulb burns out, the entire unit must be replaced. More common on today's vehicles is a style that operates similar to the sealed-beam unit, but it has a bulb that can be separated from the casing. When the bulb dies, it is much less expensive to get this type of GMC headlight back into working order. Finally, there is a third version that is much more efficient than the older styles. By incorporating an optical lens into the system, the projector-style of the GMC headlight focuses the light where it is needed more efficiently, and less of the light is wasted illuminating unneeded areas in front of the vehicle. No matter which type of light you have on your vehicle, when the bulb fails, you will find the appropriate replacement in our large online catalog for most vehicles, at a great price. We offer GMC headlight bulbs that are similar to the stock bulb, as well as extended-life versions and brighter halogen versions. They are manufactured to meet the highest quality standards and are sure to satisfy with their performance. The bulb you need for your GMC headlight, or any other parts, can be easily ordered from our secure web site or over the phone, with a toll-free call.