2010 chevy traverse

my father has a 2010 traverse that takes forever to heat up we can drive it for 20 minutes and the temp gauge only gets up to around 160. then it only blows out luke warm air, any ideas?

I would recommend taking the vehicle into your local dealership to be diagnosed. They should be able to assist you further and have a plan for addressing the issue. If you have further questions, please feel free to contact me directly. Thank you.

Tricia, GM Customer Service.