Fluid moving thru dash at start up

Been noticing a weird sound of fluid or water at the start up of my 2015 Tacoma.
I topped off my coolant last night and seems to have lost a bit since.

Any one experience this before

 

I have the same thing and it drove me nuts looking for the source. Best I can tell it’s the heater core cycling fluid but I couldn’t get it to go away.

 

Having the same prob now - plan on doing a coolant flush or buying a 22 Tundra.... hmmmm

 

what have U done to the cooling system recently

 

You shouldnt have to flush the coolant as long as you only run the Toyota brand pink coolant. It's long life, and should be fine to well over 150k miles.

 

I have a tad over 159k

 

Well alright then! Lol

 

Or wait for the 22 Tundra