Just bought 2015 2500 Cummins
Just bought truck from dealership. Drove fine for like 50 miles drove it today it got really hot fast shot coolant out overflow . Let it cool down drove it home it made it right before I got home it got really hot super fast then cooled back down fast. What could it be egr cooler fail? Or something major like a bad head gasket ?if so what can I do to tell