P0713 GMC -

Question

Hi I don't have the po713 code. probably because i have a 94 5.7 gmc suburban, but i do have a code 58 which is exactly what you are describing. I'm so frustrated trying to find where the stupid sensor is!!! no one seems to know. symptoms are as follows. Runs perfect in the morning when everything is cold. transmission shifting normally that is. then once to opperating temp. it stops shifting. throws the code 58 trans. temperature sensor circuit. What do i need to check or replace?
Just did a full service on the tranny. filters, fluid ect.
Any help would be greatly appriciated!

Answer 1

Code 58 Temperature switch circuit high

The temperature switch is part of the transmission range switch assembly remove the transmission pan