Silao (official name: Silao de la Victoria) is a city in the west-central part of the state of Guanajuato in Mexico. It is the seat of the municipio with the same name. As of the 2005 census, the city had a population of 147,123, making it the seventh-largest community in the state. Silao is a center of agricultural and industrial activity in the area, with a wide variety of farm crops, produce and dairy packing plants and a General Motors truck and SUV assembly plant which currently makes the following models: Chevrolet and GMC Pickups, Cadillac Escalade EXT and the Chevrolet Avalanche.