Question about 2003 GMC Envoy

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What should the rpm be when idling?

I have a 2003 gmc envoy, what should the rpm be while idle?

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Depending on the motor, all makes and models should ranged no less then 500 rpm and 1500 rpm, the most common idle is about 1000 rpm and 1200rpm.

Posted on May 22, 2009

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DrSpeedo
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SOURCE: My 2003 GMC Envoy tachometer is reading 5-7000 rpm

I see this a lot on the 03-06 Envoy instrument clusters, it's caused by failing stepper motors on the cluster's circuit board. It can be fixed though, check out this page about how to get it fixed - Envoy tachometer not working

Posted on Sep 30, 2010

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Roaring engine noise in cab when idling. Idles at 500-950 rpm..When raising rpm in idle noise goes away.2002 GMC Envoy 6 cly.


Should idle between 500-600. Clean your throttle body with the battery disconnected to help with the fluctuation. The roaring very well could be your fan clutch. Fan clutches are a known problem with our platform. If engaged, will sound like an airplane.

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Unplug 02 sensor and rap it up so bang around then take it for drive

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What does p0506 mean


Code 506 means the engine computer can not maintain normal engine RPM at idle. Could be a problem with the idle air control valve, or something else.

Aug 28, 2013 | 2003 GMC Envoy

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Its a 2003 GMC ENVOY


The idle speed is controlled by the computer.
Why do you need it be above 800 rpm ?

Apr 19, 2013 | 2003 GMC Envoy

1 Answer

My 2003 gmc envoy has p0303 error code. I have since changed the plugs but the code is still there. What else should I look at before changing the expensive coil on cylinder 3?


To find out if it is the coil pack, swap #3 pack with another cylinder and see if the fault changes. If not, you should check the compression on cylinder #3. If that is OK, I would suspect a bad injector.

Dec 28, 2012 | 2003 GMC Envoy

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Aug 25, 2012 | 2003 GMC Envoy

1 Answer

2006 envoy at idle of 500 rpm, voltage meter shows low charging, air conditioner quits cooling, lights dim. is the alternator bad?


This is too low an idle speed, it should be around 620 RPM. You probably need to have the throttle body cleaned.

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1 Answer

My 2003 GMC Envoy tachometer is reading 5-7000 rpm at idle and sweeps off the scale when driving.


I see this a lot on the 03-06 Envoy instrument clusters, it's caused by failing stepper motors on the cluster's circuit board. It can be fixed though, check out this page about how to get it fixed - Envoy tachometer not working

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2 Answers

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try turning up the idle ajustment screw also have alternator checked, another solution would be to have your car tuned up weak spark from your coil worn plugs wires etc. not enough power is being produced

May 31, 2009 | 2003 GMC Envoy

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