Question about 2003 GMC Envoy Xl

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2003 Envoy XL

Where is the cooling fan clutch located on this vehicle.




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It is in the front of the engine with the fan mounted to it. It is electronicly controled. If you change it be very careful the radiator is easy to damage. Good Luck

Posted on May 18, 2009

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


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.

Feb 16, 2014 | 2003 GMC Envoy Xl

1 Answer

I have a 2003 g m c envoy in which the temperture fans stay on .car is not running hot coolant full what could be the problem?


The cooling fan behind the radiator is always turning on these vehicle, its speed is controlled by the computer through a viscous clutch assembly.

Oct 19, 2011 | 2003 GMC Envoy

1 Answer

I have a GMC 2003 Envoy, each time i drive it sounds like im speeding but im going really slow , i need to change the oil could this affect that and what do i do about the sound


Difficult to know what sounds like speeding: engine, road noise, what ?

If the oil change were to help, you have bad, bad engine problems. I suspect you may have a wheel bearing that may have failed. This makes a lot of road noise, alters with vehicle speed and NOT engine speed (drop to idle, noise the same).
There is a possibility of transmission slipping. this lets your engine speed up, but not actually move the car.

There is a third common issue and that is FAN. When your fan clutch fails, is locks up a normally free spinning (somewhat) fan, as if the vehicle needed max cooling... This noise follows engine speed, the vehicle seems to go just fine, but huge noise.... This sometimes is called Jeep fan noise, as many of those used to have direct drive fans.... If this is your case, the fan clutch gets replaced, not huge $, but more than it should be.

Nov 27, 2010 | 2003 GMC Envoy

2 Answers

I have a 2006 gmc envoy xl that sounds real loud like a jet when you start it up and when excelerating it gets louder and louder. Could it be the fan clutch or the relay any answers anyone


Fan clutch failure is common on these........and very costly to replace. With the engine cold, engine off, reach in and turn the fan, it should turn with minimal resistance, if it has heavy drag, or wont turn at all, it needs replaced.

Apr 27, 2010 | 2006 GMC Envoy Xl

1 Answer

2003 Envoy XL clutch fan stays on all the time


the sensor is bad replacing it will solve the problem

Jul 19, 2009 | 2003 GMC Envoy

1 Answer

2003 Trailblazer loses power, I am getting codes P1271 and P1271p/d


#PIT3138A: 02-05 Chevrolet, Buick, Oldsmobile and GMC Mid-Sized Utilities Reduced Power Light On and DTC P1680 P1221 and/or P1271 Stored in the PCM - kw fan clutch SES light power MIL 4.2 LL8 - (Nov 1, 2004) 
The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.
Condition/Concern:
Reduced power light on and DTC P1680 P1221 and/or P1271 stored in the PCM 
Recommendation/Instructions:
Monitor the 5V reference to the Accelerator Pedal Position ( APP ) sensor, circuit 1274, using Peak Min/Max on a Fluke 87. Refer to Si document 1454678 for the 5V reference schematics. Command the fan clutch control "on" with the Tech 2 at 50%. If when commanding the fan clutch on, the 5V reverence spikes to battery voltage, the concern is the 5V reference shorted to battery voltage intermittently inside cooling fan clutch. Replace the fan clutch to repair this concern. 

Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.
Models:
(02 - 05 Chevrolet Trailblazer and Trailblazer EXT) and (02 - 05 GMC Envoy, Envoy XL and Envoy XUV ) and (02 - 05 Buick Rainier) and (02 - 04 Oldsmobile Bravada) 

Jul 16, 2009 | 2003 Chevrolet TrailBlazer

1 Answer

Engine Light on. Dealership says fan clutch is Slipping


Work for GM dealership.The fan can be replaced anytime and a pcm reflash can also be done anytime.If the service engine soon lamp is on because of cooling fan code it is broke!!!!! As far as the price sounds about right

Jan 28, 2009 | 2002 GMC Envoy

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