Generation III Internal Engine 1997-2006 LS1 | LS6
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coolant leak?!?!?

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Old Jun 23, 2012 | 09:28 PM
  #21  
bigjames28's Avatar
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I really thank everyone for the responses as they have helped me over come these issues.

I now believe I am on the home stretch. I researched my temp gauge issue and now know i need a new coolant temp sensor. However my cooling fans only come on when ac is on. This was the issue all along. Is there another sensor that controls the fans coming on when the car gets up in temp?
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Old Jun 23, 2012 | 09:32 PM
  #22  
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The AC compressor being activated triggers the fans to turn on at low speed regardless of engine coolant temp. It's intended to create airflow across the AC condenser.

Replace your coolant temp sender and get the PCM data on engine coolant temp, and you may just be fixed.
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Old Jun 30, 2012 | 01:15 PM
  #23  
bigjames28's Avatar
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Originally Posted by crainholio
The AC compressor being activated triggers the fans to turn on at low speed regardless of engine coolant temp. It's intended to create airflow across the AC condenser.

Replace your coolant temp sender and get the PCM data on engine coolant temp, and you may just be fixed.
You were dead on. I did just what you said an all problems are gone. Had to change the stock settings in the PCM after I changed the Sensor.


Thanks again guys for all your help.
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