Question about 2003 GMC Envoy

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2003 Envoy XL clutch fan stays on all the time

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The sensor is bad replacing it will solve the problem

Posted on Jul 22, 2009

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Posted on Jan 02, 2017

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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 the problem. I replace the fan some of the noise went away but still making noise


fan clutch was replaced?? what kind of noise are you hearing??

Oct 23, 2010 | 2003 GMC Envoy Xl

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

2003 Envoy XL


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

May 18, 2009 | 2003 GMC Envoy Xl

1 Answer

All at once? 2003 GMC Envoy XL


have the car scanned for trouble codes and get back to me with the codes. most major parts stores will do this for little or no charge,get back to me with the codes

May 15, 2009 | 2003 GMC Envoy Xl

1 Answer

Help me find tires and lights for my 2003 envoy xl


I replaced my tire at 75,000 miles. I put on Goodyear top of the line tires with a 70,000 mile warantee. They were very stiff and ride harder. I wish that I would have stayed with the original tires that on it. I think GM got that one right!
Be careful what you put on it, if you like the original ride...

Apr 21, 2009 | 2003 GMC Envoy Xl

3 Answers

2002 GMC Envoy is having a tough time shifting at 85,000 miles. It also starts & idles at higher RPMs. The car is also much noiser from the engin & fan. What is wrong - the trans., motor needing a...


I ran into this concern with my 2002 and my wife ran into the almost identical problem with her 2003. this may sound silly,, but it was the clutch fan. Extreme loss of power from time to time came first. Then a roar of the what seemed like the engine when stopping. Actually cut off after it started to roar at highway speeds, and had absolutely no excelleration from time to time. Sometimes all of the symptoms completely went away. After taking mine to the dealer several times, finally they got it right and replaced the fan clutch. When my wifes 2003 SLt started doing the exact same thing as my 2002 had done, we both knew what the problem was, and the dealer did a quick fix. $600.00. Perhaps this should have been a recall feature, but never was. Everyone that I know that has an envoy, somewhere around the 72,000 and 103,000 mile mark has had this problem and have had to have the clutch fan replaced. It may sound like the vehicle is going to have to be junked,, but that is all it needs.

Aug 10, 2008 | 2003 GMC Envoy

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