Where is the coolant temperature sensor located?

2002 CHEVROLET TRAILBLAZER
170,000 MILES • 4.2L • 6 CYL • 4WD • AUTOMATIC
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JACKIE OLK
  • MEMBER
  • 1 POST
I am trying to find out where the coolant temperature sensor is located at.
Aug 20, 2022 at 7:36 PM
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SQM
  • ✓ASE Certified Mechanic
  • 6,383 POSTS
  • ASE Certified Mechanic
The coolant temperature sensor is located on the left front of the engine, behind the alternator. You will have to remove the alternator to access the sensor.

I have attached diagrams below for your reference.

Let me know of any questions.
Thank you.

https://www.2carpros.com/articles/symptoms-of-a-bad-coolant-temperature-sensor
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Aug 20, 2022 at 7:42 PM
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