Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
I am sorry for the long wait
if you turn the key ON and unplug the ECT sensor connector # ***** in this picture what will the gauge read ?
located on the passenger side cylinder rhead
ok if you unplug it with the key ON and there is NO check engine light coming on when you are driving the truck the temp gauge itself is bad in the gauge cluster
the gauge cluster would need to be replaced or sent out for repairs i am sorry to say
you can always get me back through this post for FREE anytime even after you rate us here at Justanswer for any follow up anytime as i do not get credit for my work until you rate us here
if the check engine light is on and the code if for anything to do with the coolant temp sensor then either one of the wires from the sensor to the computer is shorted or bad or an issue with the computer itself
if it was just the sensor unplugged with the key ON it should max out since it is not maxing out the sensor is good
there should not be any connection with the battery disconnect causing this
ohming the wires end to end is the best test on the wires
# ***** in this picture is the PCM ( computer )
you can always get me back through this post any time
even after you rate us here for FREE
usually these end leaning torwards the wiring/connector causing these type of intermittent issues
how are you making out ?