Liens from subcontractors

[Jarvis Smith]

Hello I'd like some advice. I'm going through a situation on a house flip. My general contractor had some issues with subcontractors he has hired. They ended up filing mechanical Liens against him which has me as the "Grantor" since the work was done at my property. I've never dealt with anything like this before and the house is almost ready for the market. I'm getting a little worried. How should I proceed? 

Thanks