GILLIG LLC is a manufacturer of heavy-duty low-floor transit buses located in Livermore, California, United States. GILLIG was founded in 1890 by Jacob Gillig and is the second largest transit bus manufacturer in North America behind New Flyer. GILLIG offers a range of buses including clean diesel, CNG, diesel-electric hybrid, and battery-electric. The company has over 800 employees and has delivered over 20,000 buses to transit agencies in the United States and Canada.