Question about 2003 GMC Envoy

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Location of speed sensor on a 2003 GMC Envoy - 2003 GMC Envoy

Posted by Anonymous on

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6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

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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

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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

duane_wong
  • 6826 Answers

SOURCE: 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.

Posted on Jul 08, 2010

Z71guy
  • 154 Answers

SOURCE: my speedometer does not work on my GMC envoy

Pretty common problem with these. Here's a guide to learn how to fix GM instrument clusters yourself, I used it to fix mine and it worked great.How to guide for Envoy instrument cluster repair

Posted on Oct 05, 2010

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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.

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My speedometer does not work on my GMC envoy


Pretty common problem with these. Here's a guide to learn how to fix GM instrument clusters yourself, I used it to fix mine and it worked great.How to guide for Envoy instrument cluster repair

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