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Anything is possibl, but PMCS would have uncovered that. So I guess we will never know. But a bad temp gauge leaves it all to speculation. No fan and no idea of air temp and how the truck was driven leaves another black hole....what I can say, is that no fan will overheat the truck.

Take your pick...thermostatic switch, Bad TDM, bad Cadillac valve...I just replaced a bad Cadillac valve yesterday, wasnt the Cadillac valve solenoid, something was clogged in the valve. 75% of the time its the thermostatic switch, 20% TDM, the rest Cadillac valve. unplug the TDM and see that...

Man, not,sure where to start....but first off, a temp gauge has nothing to do with overheating. if the gauge was not working, driving the truck was not a good idea, at least not for distances. did the fan come on? You would know...as it sounds like a jet taking off, if it did not, that’s why you...