Question about 1993 GMC Sierra K1500
I mean no offense by this post in any way. But it sounds like you might have installed the wrong sensor. All of these sensors have a specified heat range of operation that it works in, and monitors. The thermo-resistor in the sensor could be the wrong specified heat range.
It may be because of a slight error in reading the serial numbers between the two (Old one and new one) but could also be that when you bought a new one, the wrong one could have been in the box that you recieved -- Which does happen occasionally.
This could also have happened with your Temperature Gauge, so check to make sure you have the correct one, and it is installed properly.
However if you're certain it is the correct sensor, get yourself a wiring schematic/diagram for the Temperature Sensor wiring and check the resistance in both the power wire, and the signal wire, and the ground wire if applicable (Depending on what type of sensor it is, a 2-wire or 3-wire.) If resistance in one of those wires is higher or lower than specified for the Sensor, it can cause a false reading to the ECM and/or the Gauge.
Posted on May 16, 2008
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Posted on Jan 02, 2017
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