Question about 2003 GMC Envoy Xl

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After replacing the fan clutch and water pump do i have to reprogram the computer on a 2003 gmc envoy?

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  • GMC Master
  • 15,478 Answers

No! there is nothing to reprogram. The sensors in the coolant system and the temp sensor for the fans dont need to have anything done to them. If you are not getting any check engine light, you are good.

Posted on Feb 16, 2014

  • Mia Ramirez
    Mia Ramirez Feb 16, 2014

    Yeds you sometimes should because the sensors in the coolant and temp sometimes are used to the regualar so you should

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Posted on Jan 02, 2017

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SOURCE: How to replace the headlights on my 2003 GMC envoy.

The headlights on the envoy are the easiest parts of the car to repair. You just pull the two tabs at the top of the headlights, screw out the bulb containers and you are good to go

Posted on Nov 15, 2008

johnjohn2
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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

ryanlutton
  • 1113 Answers

SOURCE: 2002 GMC envoy slt 4.2

Sounds like you may have disconnected the battery. Does the rough idle only happen when the defroster or A/C is on? If so clean your throttle body with throttle body cleaner with the battery disconnected. When finished, drive it for 5 or so miles with the defroster / AC off to let the computer relearn the settings. This will solve your problem.

Posted on Dec 21, 2010

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Related Questions:

1 Answer

2003 gmc envoy... I was told i needed a fan clutch.... Then. Next thing i know check engine soon, reduce engine power... Whats going on then computer... P1221, 1271, 1635 still not fix


if you were told that the fan clutch needed replacing and you did not do that , then the engine light and the loss of power would be a result of overheating of the engine and it going to limp mode
take it to a gm service centre for a explanation of the fault codes

Feb 12, 2017 | 2003 GMC Envoy

1 Answer

I replaced the clutch fan on my gmc 2003 envoy. But I still have the same problem, the noise is so loud, is there a computer that controls the fan?


you mention you have a clutch fan then you don't have any electrical control on the fan.
remove the belt to see if it 's the problem could be water pump bearing or else
hope it helps

Sep 29, 2014 | 2003 GMC Envoy

1 Answer

I replace the fan clutch and the water pump and its still making a clicking noise, what can this problem be?


Maybe the fan is hitting the shroud. Did you check the serpentine belt for fraying or damage?

Feb 16, 2014 | 2003 GMC Envoy

2 Answers

GMC Envoy 2003 overheating


Your fan clutch could be going out...iin other words, it may be turning, appearing to be fine, but not fast enough therefor, not cooliing the engine enough.

May 23, 2012 | GMC Envoy XL Cars & Trucks

1 Answer

2002 GMC envoy slt 4.2 v6 My question is.. I recently changed the water pump on my wife's envoy. After replacing it the car idles low and high, low and high constantly. No normal idle like before. I...


Sounds like you may have disconnected the battery. Does the rough idle only happen when the defroster or A/C is on? If so clean your throttle body with throttle body cleaner with the battery disconnected. When finished, drive it for 5 or so miles with the defroster / AC off to let the computer relearn the settings. This will solve your problem.

Dec 21, 2010 | 2002 GMC Envoy

1 Answer

Have a 2003 gmc envoy. trying to take clutch fan motor off. took off bolts from the pulley cant get it off. Help.


YOU HAVE TO REMOVE FAN AND CLUTCH TOGETHER FROM VECHICLE.YOU CAN USE WRENCHES TO HELP REMOVE FAN FROM CLUTCH.

Sep 21, 2010 | 2003 GMC Envoy

1 Answer

Clutch fan is wobbling What is it?


this is a sign that either the water pump bearing or the bearing in the fan clutch failed.

Aug 16, 2010 | 2003 GMC Envoy

1 Answer

2003 envoy sounds like a jet i just replaced fan clutch and still sounds loud


IT MAY BE THAT THE CLUTCH IS LOCKED UP BY DEFAULT, SO THE ELECTRONICS TO THE FAN CLUTCH ARE MOST LIKELY THE PROBLEM.

Aug 10, 2009 | 2003 GMC Envoy

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