23 SEL coolant

26k miles. So it finally happened, went to go start my car the other morning and got a warning saying my coolant was low. Popped the hood and sure enough. Very scant amount in the bottom. Called the dealership, they’re getting me in to have it looked at this coming Thursday. They had me top it off with coolant until my appointment, but it’s barely decreased at all in the last week since I topped it off. Wondering if there even going to be able to find anything? Is this the probably the dreaded head gasket issue? If it was that low I can’t for the life of me understand why I didn’t get any warnings the day before when I was driving it then.

26k miles. So it finally happened, went to go start my car the other morning and got a warning saying my coolant was low. Popped the hood and sure enough. Very scant amount in the bottom. Called the dealership, they’re getting me in to have it looked at this coming Thursday. They had me top it off with coolant until my appointment, but it’s barely decreased at all in the last week since I topped it off. Wondering if there even going to be able to find anything? Is this the probably the dreaded head gasket issue? If it was that low I can’t for the life of me understand why I didn’t get any warnings the day before when I was driving it then.