Question about 2002 GMC Envoy XL

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I cant locate the ECT Sensor on my 2003 GMC Envoy

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6ya6ya
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Posted on Jan 02, 2017

  • 375 Answers

SOURCE: check engine light on - 2003 gmc envoy XL

That code represents a lower than expected reading for temperature (coolant). First thing to do is check your coolant level, as if it is low, then the sensor can not read correctly. Second, you may have a thermostat that is stuck open, allowing the coolant to cool off too much. The sensor should be mounted on top of the engine, near the thermostat housing.

Posted on May 18, 2008

  • 1 Answer

SOURCE: ECT Sensor location on MPV 2003

Find the thermostat housing a little left of the bottom of the battery base plate. It is a junction point of three coolant hoses. Then, diagonally to the upper left about 2.5 inches you'll find the L-shaped sensor. Unclip the wire feed from the top part of the sensor. Then turn the piece to the left and pull it out. Have the other one ready quick as coolant will come out fast so place a catch basin under the car to catch the coolant. I just did mine an hour ago and it was easy.

Danny K

Posted on May 12, 2009

  • 279 Answers

SOURCE: Blower motor resistor location

Its located on the passenger side behind the plastic panel underneath the dash,mounted to the ac box.

Posted on Feb 09, 2010

  • 91 Answers

SOURCE: Location of coolant temperature sensor on 2003 GMC

on the left front of the block by the alt. 4.2 L engine

Posted on Feb 24, 2010

johnjohn2
  • 5763 Answers

SOURCE: where is coolant temp sensor located on 2003 gmc

heres a diagram to show you where the coolant temp sensor is located, its behind the alternator on the left side (driverside),the sensor just unplug the connector and then unscrew it and out it comes.

Posted on Jun 21, 2010

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The sensor is located behind the crank pulley mounted to the timing chain cover.

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What is the location of the coolant sensor on a 2004 gmc envoy


Hi there:
The Coolant Temperature Sensor location on 2000-2005 4.8L, 5.3L, 6.0L engines is in the head driver side, above the plug.



Additionally, this video also could help you...



Hope helps.

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CODE #PO128 KEEPS RETURNING AND AC CUTTING IN & OUT


It's a thermostat/coolant issue. The definition is here:


P0128 Engine Coolant Temperature Below Thermostat Regulating Temperature



Possible Causes
  • Check the operation of the thermostat (it may be stuck open)
  • Coolant level is too low, or the coolant mixture is incorrect
  • ECT sensor connector is damaged (check pins for damage, and for moisture)
  • ECT sensor signal circuit has a high resistance condition
  • ECT sensor has failed

Jan 20, 2011 | 2003 GMC Envoy

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Intake air temperature sensor location on gmc envoy?


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Jul 13, 2010 | 2003 GMC Envoy

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Trouble locating cooling sensor on 2003 gmc envoy


4.2L Engine To Remove:
  1. Disconnect the negative battery cable from the battery.
  2. Drain the coolant from the engine.
  3. Disconnect the engine coolant temperature (ECT) sensor connector. Engine coolant temperature sensor removal and installation gm-04-42-1509.gif

  4. Remove the engine coolant temperature (ECT) sensor from the engine.
To Install:
  1. Apply thread sealer P/N 12346004 or equivalent to the engine coolant temperature (ECT) sensor threads.
  2. Install the engine coolant temperature (ECT) sensor into the engine. Torque the sensor to 12 ft-lb (16 Nm).
  3. Connect the engine coolant temperature (ECT) sensor connector.
  4. Refill the engine with coolant.
  5. Connect the negative battery cable to the battery.
5.3L & 6.0L Engines To Remove:
  1. Drain the coolant from the engine.
  2. Disconnect the engine coolant temperature (ECT) sensor connector. Engine coolant temperature sensor removal and installation removeect.gif

  3. Remove the engine coolant temperature (ECT) sensor from the left cylinder head.
To Install:
  1. Apply thread sealer P/N 12346004 or equivalent to the engine coolant temperature (ECT) sensor threads.
  2. Install the engine coolant temperature (ECT) sensor into the left cylinder head. Torque the sensor to 15 ft-lb (20 Nm).
  3. Connect the engine coolant temperature (ECT) sensor connector.
  4. Refill the engine with coolant.

Jul 08, 2010 | 2003 GMC Envoy

1 Answer

Where is coolant temp sensor located on 2003 gmc envoy v6? How do you replace it?


heres a diagram to show you where the coolant temp sensor is located, its behind the alternator on the left side (driverside),the sensor just unplug the connector and then unscrew it and out it comes.

Jun 21, 2010 | 2003 GMC Envoy

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Where is the temperature control sensor located on a 2003 gmc envoy


The engine coolant temperature sensor(ect)is located
on the front of the engine, just above the alternator.
Hope this helps.

Mar 14, 2010 | 2002 GMC Envoy XL

1 Answer

How to replace a rain sensor on a 2003 gmc envoy, and where is locate


Rain sensor is mouted next to inside rear view mirror assembly on the windshield. The retaining ring is permanantly mounted to windshield. Disconnect connector and pull down on sensor. Do not touch the surface of the sensor.

Oct 03, 2009 | 2003 GMC Envoy Xl

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