Yes, as you progress thru to the higher temps, warnings and bells before an engine saving shut down. But if there's a problem with the ECT sensor, then.....?
Total failure of the water pump, gushing out the front lower engine area, with no coolant flow moving across the sensor, perhaps no heat was seen.
However, as the ECT heat rose, so would the oil temps, which would show up as a drop in psi as it thinned out.
Although some (Schaefer's) synthetics will hold psi as you reach toward 300*.
Keep us updated on the outcome.
2007 LBZ 3500 LT3 DRW Crew Cab, Sulastics, Putnam XDR 15K, B&W 30K-Turnover GN+Companion, Ride-Rite Air...EFI'd by Rob
2008 LMM 3500WT DRW Crew Cab, 8 'Flat/GN, Workforce Alum Toolbox, Ride-Rite Air Use-ta Haves 2006-6.0 3500 WT DRW ExCab Flatbed, 2005-LLY 3500 LS DRW Crew Cab, 2002-LB7 3500 LS DRW Crew Cab I Live my life in such a way that when my feet hit the floor in the morning...Satan shudders & says "Oh shit, he's awake!"