Truck ran hot this morning. Opinions please

[gmfan454]

The truck got hot this morning on the way to work. It got to the Check Gauges status hot before I could pull of the highway. I thought it could be a stuck thermostat or maybe I lost a hose or something but I noticed a kind of grinding/ticking kind of noise behind the dash. The heater wouldnt work while that noise was happening. Any ideas gentlemen? I pulled over and added water to it and it was almost empty so I have a leak somewhere that I will look into this weekend but the behind the dash noise I am not use to dealing with. After the water was added, the truck ran fine and cool as normal.

 

[thz71]

I would gues your heater core dumped all your coolant

 

[Blaine Davies]

I would gues your heater core dumped all your coolant

X2^^ check your floor mats, if they're soaked in coolant, there's your problem. Check for cracks in the heater core lines going into/around the firewall too.

 

[gmfan454]

I will check that stuff. Thank you for the replies. I def didn't notice wet floor mats this morning but it was dark and I was still sleepy.

 

[98_k1500]

1st off, check your engine oil, if it is a internal intake gasket leak, it could all be going into the oil pan. You should have been able to smell it if it was the heater core. Would have been a crazy take your breath coolant smell in the cab. Im betting on a freeze plug being rusted out.