Question about 2003 Chevrolet Malibu

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Coolant Temp Sensor 03 Malibu

How do I change my coolant temp sensor on my 2003 Chevy Malibu? My mechanic says this is why I am not able to pass emissions, is this true?

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  • Anonymous Mar 17, 2014

    Low coolant light on 2003 Chevy Malibu stays on. Collant level is good.

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  • Chevrolet Master
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Coolant sensor maybe 19 mm key its near the upper radiator hose in the engine thanks pierre

Posted on Dec 06, 2008

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  • Contributor
  • 1 Answer

My car runs hot ..i have changed the radiatior and thermostrat and the water pump there is no water in the oil and oil in the water

Posted on Mar 24, 2011

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mnabi01
  • 94 Answers

SOURCE: cooling fans on 2001 chevy malibu will not come on unless ac on

the relays control circuit is grounded by ECM (computer) . to check this make sure the is hot enough for the fans to be commanded on by computer and check to see if you have voltage at relay and it has ground from computer . you may need ECM.
good luck

Posted on Jan 28, 2009

  • 279 Answers

SOURCE: need to know location of coolant temp sensor in 2003 Impala

Need more info. I see from the location of your post that you have a 2002 Blazer. Do you mean a Trail Blazer? Chevy didn't make a Blazer in 2002. The ECT (engine coolant temperature sensor) is located on the driver's side, front of the engine. (on top) It is between the ECM (engine control module aka the engine computer) and the alternator. You will most likely need to remove the alternator and it's belt to obtain easy access to the sensor. If you need to remove the alternator for access, remember to disconnect the battery's negative terminal first. The sensor has a wiring harness with a connector mounted to the top of it. After you remove the electrical connector, the sensor will screw out using a deep socket and ratchet. You will loose some coolant (antifreeze) during the change, so make sure you have some DexCool antifreeze on hand.
Charlie

Posted on Mar 04, 2009

  • 1 Answer

SOURCE: location of coolant temp sensor on 2003 chevy

Its on the driver side head. Theres a plug and sensor on the head.

Posted on Mar 28, 2010

6ya6ya
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Posted on Jan 02, 2017

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I need to change the Coolant Temperature Sensor on my 2003 Chevrolet Malibu. I rarely know anything about cars, but the mechanic shops charge too much. Please help. I need detailed instructions or a...


This is a little much to give you the detailed instruction that this job will require. Presuming you have the tools to do this job, go to the library and get the Motor Manual for the 1993 vintage vehicles and review the secion on coolant sensors.

Warning, this may be more than you want to get involved with. If you are not able to go completely through this procedure, the repair will be more costly than the original sensor replacement.

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