HID kit means High Intensity Discharge kit. It is a kit that contains items necessary for the conversion of car headlights from old halogen lights to the new xenon lights. Xenon is the gas that surrounds the walls of the bulb allowing it to produce a brighter light that covers a wider area. HID kit makes it possible to modify the car headlights to make them brighter and safer in an easy way.GMC HID kit is probably the best conversion kit in the market with the most affordable prices. The kit has solved car headlight problems out-doing the halogen bulbs by far. It provides light that covers a wider area and a long distance. GMC xenon is taken through variety of tests before it is released to the market thus they of high quality. Durability is assured with the GMC xenon light thus you are guaranteed bright light for a long time. These lights also come with a warranty covering a certain period of time depending on the type of xenon bulb that you r car uses, most of the warranties however cover up to a period of one year. In case of damages during this warranty period replacement is provided free of charge.There are also local rules that should be taken in to account when using these xenon lights. These rules have been observed by GMC HID kit and thus converting your lights will not result in a problem with the local authorities.Conversion from halogen lights to GMC xenon is easy. The HID kit contains all the materials required in order to make these modification. Included in the kit are a xenon bulb, cables for connection and two solitary ballasts. The cables and connections are used to make a link between the bulb and an electricity source. The solitary ballasts are used to run the bulb and control the amount of light needed. Instructions are contained in the kit to enable you install the xenon lights all by yourself by following the easy steps.GMC xenon bulbs are available in many different colors and sizes. There is therefore a bulb type that will fit your car no matter what GMC model it is. It is important to know the bulb type before purchasing the kit. If you are not sure of the bulb type you can check on the car manual or contact your car dealer and request for the details of the bulb type.