Question about 2003 GMC Envoy

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Clutch fan my mechanic says that i need to replace my clutch fan in my envoy, but it doesn' tover heat? any suggestions?

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I would suggest getting a second opinion. But without mentioning it. Some cars have systems that decrease power to cylinders to prevent overheating. It is possible to still do damage even if your not overheating.

Posted on Jun 16, 2009

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3 Answers

Is it a transmission or coil or fan clutch problem?


the fan clutch only runs the fan when the coolant temperature gets hot and has nothing to do with the gear box.. I suspect that the noise is from a faulty front input shaft bearing in the gear box or as I read it a faulty torque converter if it is an automatic. I think that you should go to an accredited service centre for a proper diagnosis before it breaks your bank as from what I am reading , the mechanics you have been going to do not have sufficient knowledge to fix your fault

May 25, 2014 | 2003 GMC Envoy

3 Answers

How much should I expect to pay to have the fan clutch and thermostat replaced in my 2004 Envoy?


The parts prices are $36 thermostat and depending on fan clutch model $88 - $260 From autoparts warehouse site
which leaves $580 for draining system and replacing parts and refilling system plus time a bit steep
get another quote from a different mechanic and decide

Apr 18, 2017 | 2004 GMC Envoy

3 Answers

I have a 2004 Envoy slt 4wd auto....The car will shift fine from 1st to 2nd gear but rpms climb and it does't go to 3rd. I tried to maunually shift through gears, but it still doesn't get 3rd?


its most def a purely transmission issue i believe its the solenoids. have it taken to a reputable trans shop near and have them diagnose it with there speciall code reader.

Oct 24, 2012 | 2004 GMC Envoy SLT

2 Answers

2002 gmc envoy is over heating have changed the thermostate and the put new radiator but its still over heating any suggestions


Have the FAN CLUTCH checked. they are a common failure. Get a AC DELCO or the part from the dealer. Why was the radiator replaced? Heater work OK? A/C works OK?

Sep 22, 2011 | 2002 GMC Envoy

1 Answer

02 envoy, 6 cyl, loud wooshing noise when engine is cold. fan clutch seems fully engaged. goes away when engine warms up. is this normal or does fan clutch need replaced


Fan clutches for Envoys and Trailblazer are a problem, they go out all the time.

However, it is normal for it to do this when cold, but will only stay engaged for maybe 15 seconds AFTER you've put it in gear and have started to drive. After this, it will disengage and allow the engine to warm up faster.

If you haven't already replaced the fan clutch once, you're lucky. 2002 is especially bad for the clutches, but all years don't last long. Mine lasted 90k which is pretty long.

Feb 26, 2011 | 2002 GMC Envoy

1 Answer

2003 GMC Envoy Service Engine light on. OBD2 Code is P0128


Ah the famous P0128.....It's 1 of 2 things. If your fan is not engaged constantly (would sound like an airplane or big rig everytime you step on the gas) and is working properly, that rules out the fan clutch. The other common problem is the thermostat. Replace the thermostat and the code will go away. Engine temperature needs to be at 210 degrees on these engines. If the fan clutch is constantly engaged, it's cooling the engine off constantly and won't get up to 210 fast enough. If it's the thermostat, it's stuck open and isn't allowing the coolant to properly heat up in time.

Feb 08, 2011 | 2003 GMC Envoy

1 Answer

I unplugged my fan blade clutch on my 2004 Envoy because when turning on the heat or a/c truck would shut off. Now that fall is approaching, i need to get to the root of the problem. Is it the Fan Blade...


The throttle body needs to be cleaned, grime in this area prevents the throttle plate from closing completely and allowing air to enter, making the air/fuel mixture lean.
Keeping the fan clutch from working can lead to overheating conditions and it will set your check engine light.

Sep 08, 2010 | 2004 GMC Envoy

1 Answer

Same Problem


That's right!

Jun 23, 2009 | 2004 GMC Envoy

1 Answer

2002 envoy fan clutch went out replaced it does the PCM need to be reprogramed too.


I'm taking my 2001 yukon Denali to the mechanic to fix a potential wheel bearing problem. Is it expensive to fix them?

Jun 08, 2009 | 2002 GMC Envoy

1 Answer

Ticking noise coming from my 2004 envoy


like ticking while idling try unplugging eletric fan clutch harness to see if it goes away if it does replace fan clutch and its called a viscuss clutch fan.

Dec 28, 2008 | 2004 GMC Envoy

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