Cruising east on I70 in Kansas last night about 11 pm. Just got on the turnpike, stopped to check my load and grab a cup of coffee. Stopped for about 10 minutes, temperature 2 below zero 40 mph wind gusts. Beautiful night! When i jumped back in the truck to leave, shut down alarm engine died. Checked code 17, raised hood no coolant in sight glass. Noticed coolant had been spraying out of air hole in coolant overflow tank. Noticed coolant on inside of hood on driver side steer axle suspension parts. Put in 1 and 3/4 gallons of coolant, wiped off best i could all signs of coolant. Drive 40 miles, got out and checked everything was dry. After another 30 miles lightning bolt flashed. Pulled over and checked. Coolant coming out of air hole in overflow bottle sight glass showed full. Stopped 40 miles later coolant still coming out of overflow bottle sight glass still showing full. Ran in 11th and 12th gear to keeps rmps above 1500 thinking egr valve would open less if i kept the rpms up and running free. After another 80 miles no coolant coming out sight glass showed full. Lightning bolt came on 2 more times when in hard pull in the next 180 miles. At home now, sight glass shows full, overflow full to hole in cap. I replaced the egr cooler, cleaned screen at 122,000 miles. It has 132,000 on it now. Anybody got any ideas? besides a 100 pounds of C4.