Hours Of Operations Green Mountain Energy Illinois Green Mountain Energy Hours of Operation and Locations in Illinois 4.9 - 20 votes 1 Locations in Illinois www.greenmountain.com Green Mountain Energy Hours Category: Home & Garden Green Mountain Energy - Cicero, IL 60804 5733 W Roosevelt Rd(708) 477-6240 View Store Details Recommend For You Heritage Propane Home Sense Peoples Gas Pepco United Power Aero Energy Bellagio Salon Duke Energy Ferrellgas Toys R Us