Upgrading to LED Headlights on a 1999 GMC Sierra 1500 morsunled.stck.me

Installing LED bulbs on a 1999 GMC Sierra is a simple DIY project. Open the hood and locate the back of the headlight housings. Twist the factory bulb socket counterclockwise to remove it, unplug the old halogen bulb, and plug in the new LED bulb. Most LED kits include a driver box (a small module that regulates power) that must be secured away from heat sources and moving components using zip ties. The challenge on the 1999 Sierra is the limited space behind the headlight housing; some LED bulbs have large heat sinks or fans that may not fit without modification. If this occurs, you may need to purchase aftermarket dust covers that provide additional depth or trim the factory covers carefully. Once installed, test both low and high beams before reassembling any covers.