Start by refilling the system until full. Then start the engine and allow to run until hot. Continue to fill the system. At this point if there is a bleeder screw at the thermostat housing open it to allow any air to escape (some don't have it). Top the coolant of and install the cap.
Here is a guide that will help you.
Please let us know if you need anything else to get the problem fixed.
Monday, June 26th, 2017 AT 9:20 PM