I just replaced the heater core in my 2010. I did the cut and splice method. Heat is now Death Valley in all vents. Prior I had heat only on driver side. If you search a flush of the heater core may look fine but the passenger side is usually caked up so even though you get 'clean' fluid it's only flushing one half of the unit. All aside the swap too me about an hour to do. Quick system bleed and all was good. My 2010 uses HOAT coolant so I bought Zerex G05 to top off what was removed when changing out. Be careful and don't mix coolant types.
John/Horace reacted to a post in a topic:
Weak heat passenger side