GMC Bulbs & all possible Bulb Sizes

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Not every GMC model boasts factory HID (high-intensity discharge) bulbs installed; that is why the aftermarket car industry is their main supplier. You can also hear these lamps called xenon lights, and behind this name stands a relatively new technology (introduced in 1997).

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Xenon light is much brighter and focused than its halogen analog and requires less energy to run once ignited. In the xenon bulb, electricity passes through the ionized gas (xenon) at high pressure, producing bright white light. That is why these lights are also known as high-intensity lamps and sold in Xenon Kits with ballast and plugs.