coolant temperature sensor - Chevrolet Forum - Chevy Enthusiasts Forums

coolant temperature sensor


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  #1  
Old  May 30th, 2007, 10:53 AM
coolant temperature sensor

how do i change the coolant temperature sensor on a 2003 Trailblazer. I have already purchased the part but i seem not to find where the sensor is located.

  #2  
Old  May 30th, 2007, 11:26 AM
  • Join Date: Jan 2007
    Posts: 424
RE: coolant temperature sensor

Which engine?

  #3  
Old  May 31st, 2007, 12:47 PM
RE: coolant temperature sensor

Sorry, the engene is a 4.2, 2 wheel drive.

  #4  
Old  May 31st, 2007, 3:54 PM
  • Join Date: Jan 2007
    Posts: 424
RE: coolant temperature sensor

The sensor is locatedon the driver's side near the front of the engine. It screws into the block behind the alternator. To replace it, you will need to remove the serpentine belt and the alternator and drain the cooling system down to below the level of the sensor. Looks like the electrical connector plugs to the sensor from above -- you will pull the connector straight up to remove it. The connector has two wires, one yellow and the other black. Hopefully, this will help you to locate it.

Good luck

  #5  
Old  June 5th, 2007, 12:49 PM
RE: coolant temperature sensor

That really helped, thank you so much.


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