Question about 2003 GMC Envoy

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Coolant level the coolant level is not getting down since one year in my GMC ENVOY 2003. is ot normal?

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  • eastangel_16 May 24, 2009

    the water in the coolant is not missing since one year even in summer. is that normal?

  • Michael Masters
    Michael Masters May 11, 2010

    I'm not sure what you are asking. getting down??

    can you please clarify??


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I see, this is a sign of a good coolant system. there is no problem here. The system is fine. i do recommend flushing the radiator once a year but, your truck is in good condition.

Posted on May 24, 2009

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Which coolant does a 2003 envoy need?

The cooling system in your vehicle is filled with DEX-COOL engine coolant. This coolant is designed to remain in your vehicle for 5 years or 150,000 miles (240 000 km), whichever occurs first, if you add only DEX-COOL extended life coolant.

A 50/50 mixture of clean, drinkable water (if the water in your area is of poor quality, it is recommended you use distilled or de-ionized water) and DEX-COOL coolant will:
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Oct 16, 2010 | 2003 GMC Envoy

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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.

Jun 21, 2010 | 2003 GMC Envoy

1 Answer

Location of coolant temperature sensor on 2003 GMC. I am getting a low coolant message and the jug has some in it.

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What service should be performed at 90,000 miles on a 2003 GMC Envoy XL?

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