Question about 2004 GMC Envoy

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I need to know the outside temperature sensor ware is fixed envoy 2004 xl

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The sensor is mounted in front of the radiator on the radiator support, it is just right of center under the support.

Posted on Oct 23, 2010

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Posted on Jan 02, 2017

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Why does my2004 gmc envoy xl slt idle high at startup?


This is normal. All vehicles idle high at start up to get the engine to operating temperature. This is known as open loop. The computer ignores signals from O2 sensors to keep your engine running safely. Once it has warmed up, it will enter closed loop, and you will see a decrease in idle.

Jul 05, 2014 | 2004 GMC Envoy XL

1 Answer

Where is the location of the coolant temperature sensor on my 2004 gmc envoy,and what is the best way to get at it?


if you have a code for erratic thermostatic or coolant temp ,change the thermostat it is a known problem ...located under the alternater very hard to change make sure you get an acdelco or dealer part ;) assuming it is the in line engine

Nov 20, 2010 | 2002 GMC Envoy XL

1 Answer

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

I have a 2004 GMS Envoy xl that is putting out the codes P0136 (twice) and then P0606. What do they mean?


P0136 - O2 sensor malfunction, Bank 1 sensor 2." Drivers side exhaust down pipe after the Catalytic converter O2 sensor needs to be replaced."

P0606 - Control Module Internal Performance " Internal PCM failure." Replace the PCM.
For Electronic Throttle Control applications, an internal PCM failure, or an ETC system FMEM condition exists. Repairing the other DTCs can fix the P0606.

Good luck and hope this helps, keep me posted. Be glad to know you got your GMC running 100% again.

Nov 13, 2009 | 2002 GMC Envoy XL

1 Answer

I have 2002 GMC Envoy XL,and have a pannel where reflect the outside temperature but since some weeks ago stay in 50 when is 80 or 85 outside.


your vehicle is new enough that I would say one of your components is defective,diagnoses from a dealer or auto electric shop would be recomended.Sounds like your sensor outside is defective.

Jul 22, 2009 | 2002 GMC Envoy

1 Answer

Outside temperature on rearview mirror is sayin OC on 2002 envoy


Have you used the handy search feature? You would find that this is likely caused by one of 2 things. First, the ambient air temperature sensor may have gone bad. Secondly, wiring from the sensor to the mirror may have gone bad. Either way, you would get OC (which stands for OPEN CIRCUIT).
Found this solution on:
http://forums.trailvoy.com/showthread.php?t=54333KQ3SYK

Mar 22, 2009 | 2002 GMC Envoy

5 Answers

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.

May 18, 2008 | GMC 2003 Envoy XL

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