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1993 Silverado K1500 DTC 59

Adam Placker

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Adam Placker New Member

Adam Placker

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Hello there!

 

My 1993 Silverado K1500 is throwing code 59. From what I can find this indicates that the transmission fluid sensor circuit voltage is high, which would mean that the sensor is telling the computer that the fluid is too hot? If I clear the codes and start the truck cold, it immediately throws this code. So I know **for sure** that the transmission isn’t actually hot. My question is, how should I go about diagnosing this? Is the sensor external and is there a way I can test to be sure the wiring is right? Or is it internal and should just be replaced?

 

Appreciate any pointers you can give me.

Edited by Adam Placker
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