Sorry to revive this thread. I have a 2018 with 34k miles. Got the low coolant light today. Truck has been sitting undriven in garage for four months. Surge (top tank) full. Ambient temp in Minnesota is 52F. Gauge shows temp at 210 all the time this AM. Wiggled surge tank and warning went off. Assume faulty coolant switch? Still 210 seems high right?
Thanks!