Truck was giving me issues, so I shut it down last night. Woke up about 4 am eastern to fire it up. It clattered, banged, and probably emitted a ton of smoke. But finally warmed up. However as I got out of bed I realized it wasn't all that warm. I checked the temp on the dash, and it read 00. I figured it must be broke. Nope, it was that cold. Left it run while I at breakfast. Hope it's still running.