Grand lac Sac à Plomb is a Lake located in Saint-Guy; Les Basques, Quebec.

• Latitude: 47° 59' 18'' North   (decimal: 47.9883619)
• Longitude: 68° 44' 5'' West   (decimal: -68.7347483)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Saint-Guy; Les Basques
• GPS Coordinate Locator Map: Grand lac Sac à Plomb Lat/Long