Question about 2002 GMC Envoy

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Idle air control valve

When the a/c or defrost is turned on the engine will run rough and sometimes die, idle air control valve? if so where would i find it?

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  • GMC Master
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Should be right on or very near the throttle body.
idle air control valve - 1_20_2013_7_09_28_pm.jpg

Posted on Jan 20, 2013

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Posted on Jan 02, 2017

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SOURCE: My 2003 GMC Sierra Idles Rough And Cut Off

Before replacing the O2 sensors, I would check the fuel pressure. You may also try to have someone pull a trouble code from the powertrain control module to verify why the engine light is on. Do not replace any parts until this is done, otherwise your going to be guessing at the root cause, and it will get expensive with part replacement.

Posted on May 12, 2010

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SOURCE: Engine will start and rough idle but dies when either the brakes are applied or the lights are turned on!

have you checked out your fuel filter? I had my 2003 denali do the same type of problem and it turned out to be a very dirty fuel filter.

Posted on Sep 06, 2008

  • 14 Answers

SOURCE: 1992 gmc chevy 350 wont idle when warm

This could be a number of things but i think that your problem sounds like a vacuum leak or an EGR problem. Try listening for leaks and try un-plugging the EGR solenoid valve one time.

Posted on Apr 17, 2009

michigan man
  • 3533 Answers

SOURCE: AC blows hot air

try this website fix & troubleshoot heating & A/C www.automedia.com and another car A/C repair www.directgardening.com

Posted on May 25, 2009

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SOURCE: 1994 GMC JImmy 4.3 V6 running very roughly

fuel pump sock or try the egr valve to see if it is stuck open all the time. can't remember if that one has the digital one and a vachumm type as well, next would be the evaperative canister purge valve.

Posted on Jul 05, 2009

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