Overheating only on Gauge

[TEP in MN]

Hi all new to forum have a little problem and need some help please.

 

I have a '95 Silverado 15004WD and my temp gauge inside the truck bounces between 210*and250* it will stabilize at 210* after about 10 minutes of normal driving my question is this what is making these false readings since I checked the temp at the Tstat and that was 195* and checked the temp at the sending unit and that was 195* also. I have replaced the temp sending unit, water pump, Tstat. I do not have any coolant loss either. Any ideas as what is wrong and what I can do to fix this problem? Thanks to all who respond.

 

 

Todd in MN

[sjspor]

It may be possible that you have 2 ECTS sensors, the 95 saturns had this, one for the PCM and one for the Temp gauge. In 96 they combined them into one. Not having a wiring diagram I can say for sure, but again, these were little tiny suckers in the side of the head.

[bobcat5544]

1st off what engine do you have.

2nd where was the sensor you replace located on the engine

[TEP in MN]

1st off what engine do you have.

2nd where was the sensor you replace located on the engine

 

<{POST_SNAPBACK}>

 

 

 

 

5.7

located on block above manifold driver side

[bobcat5544]

1st off what engine do you have.

2nd where was the sensor you replace located on the engine

 

<{POST_SNAPBACK}>

 

 

 

 

5.7

located on block above manifold driver side

 

<{POST_SNAPBACK}>

 

 

 

 

 

thought so. that sensor is the engine temp switch, look on top of the intake manifold front to the left of the upper radiator hose out let, there is a sensor there screwed into the intake manifold that is you coolent temp sensor of your temp gauge.