Paccar coolant issue

I have a 2019 Paccar MX13 510hp

coolant alarm keeps going on and when I have pulled over. It was full

in the am I have added as little as a quart to 1/2 gallon but twice in the last week it puked coolant out when I stopped and had the engine idling

I changed the sensor. No difference
Replaced both radiator caps. No difference

it will sometime stop dinging for hours or Evan a day or two and then ding for the next day or more with random breaks

when I stop. It seems to at times stop dinging. Or I can let some pressure out of the reservoir and the level tops off

as soon as I start driving. It starts up again

seems to me the coolant is getting sucked down??

it’s random enough that I don’t thinks it’s a wire
It also seems if I’m south of I10 like Cali to Florida it stays off but north. It starts

Nothing in the oil

Nothing in the coolant and level goes up once I release pressure or it cools down overnight
And I don’t see or notice any white smoke out the stack

 

Last summer

 

is the gasket a replaceable item or would it need a whole new unit?

I “might” have figured it out
Too early to tell yet
But after cooling down and with the new caps in. I added about 1/2 gallon bottles f coolant
200 miles this am and no dings yet and no coolant pushing out

will know soon enough