I have a 2008 silverado 6 cyl and the engine overheat message turning ac off message is showing. My engine cooling fans are running on high speed and the temp gauge is showing 160. The engine bogs when i drive it and am worried i am doing damage to it. Can anyone help me with where to start looking to fix this. the truck only has 33,000 miles on it but of course the 36 months ran out 2 weeks ago. any help would be appreciated

 

Take it back with a warrenty issue anyway.

 

Either the temp sensor is bad and or the stat isn't working correctly.They need to run at a temp of 195.


BTW-please keep this situation on the open forum so all will benefit from your solution.We have a member who is trying to use the PM system which is counter productive to the goals of forums.

Thanks,

Terry

 

I have the exact same issue. I just replaced the sensor and it didn't show over heating for two days and then it all started again. Engine over heating, fan on, temp reading shuts down. But when I drive home after about 10 hours of the truck sitting it stills shows over heating. But after about 10 miles of driving the temp gauge starts reading again and the alarm clears. Don't know what it is and could be. Would also like to see other suggestions.

 

Welcome to the forum. The ECT sensor is a thermistor whose resistance varies inversely to the temperature. The ECM supplies a reference voltage on one wire and ground on the other and then senses the voltage drop across the ECT sensor to derive the resistance. So, if the temperature is read extermely high without the actual signs of overheating, there's probably a short in the circuit to ground. If you're handy with a multimeter, it's not that hard to troubleshoot.