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TrailBlazer 2002-2009
The TrailBlazer, originally introduced as an upscale Blazer, was produced from 2002 to 2008 with a powerful I6 engine and with a monster V8 offered in the Trailblazer SS
Platform: GMT 305, 360, & 370.

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  #1  
Old 05-30-2007, 10:53 AM
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Default 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.
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Old 05-30-2007, 11:26 AM
 
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Default RE: coolant temperature sensor

Which engine?
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Old 05-31-2007, 12:47 PM
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Default RE: coolant temperature sensor

Sorry, the engene is a 4.2, 2 wheel drive.
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Old 05-31-2007, 03:54 PM
 
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Default 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
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Old 06-05-2007, 12:49 PM
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Default RE: coolant temperature sensor

That really helped, thank you so much.
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2003, change, chevy, coolant, engine, locate, located, location, replace, replacement, sensor, ss, temp, temperature, thermastat, trailblazer

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