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Eric
Eric, Automotive Repair Shop Manager
Category: GM
Satisfied Customers: 30268
Experience:  20+ yrs. experience as repair shop manager and technician.
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Where is the idle control valve for a yukon danali

Resolved Question:

where is the idle control valve for a yukon danali
Submitted: 7 years ago.
Category: GM
Expert:  Eric replied 7 years ago.

Hi,

 

It is located on the throttle body:

 

Click image to see an enlarged view

Fig. Air passage breakdown, mounting screws (4) IAC valve (3) O-ring seal (2) on 2000-02 4.8L, 5.3L, 6.0L engines

 

 

Click image to see an enlarged view

Fig. Throttle (TP) and air intake control (IAC) harness connector

Customer: replied 7 years ago.
so to replace it i have to remove the throttle body?
Expert:  Eric replied 7 years ago.

Hi,

 

No, you can remove the IAC valve without removing the throttle body. the one diagram just shows it with throttle body removed for clarity.

 

graphic

 

remove the retaining screw and connector(2 red arrows pointing at them), and then remove the iac valve

Customer: replied 7 years ago.
I'm sorry its a 2002, because that layout seems a little different?
Expert:  Eric replied 7 years ago.

HI,

 

I believe yours has the electronic throttle body then, which means that the IAC valve is integrated into the throttle body and not servicable separately.

 

below is electronic throttle body. If this is yours, then the IAC valve isnt servicable:

 

Click image to see an enlarged view

Expert:  Eric replied 7 years ago.

Hi,

 

If you are having idle problems, there is a TSB on this issue that states to clean the throttle body and then the PCM is recalibrated-this can only be done at a gm dealership with their software and scan tool:

 

#04-06-04-040: Idle Instability, Low or Rough Idle with Electronic Throttle Control (Clean Throttle Body) - (Jun 14, 2004)

Subject:Idle Instability, Low or Rough Idle with Electronic Throttle Control (Clean Throttle Body)

Models:2002-2003 Cadillac Escalade, Escalade EXT
2000-2003 Chevrolet Silverado, Suburban, Tahoe
2002-2003 Chevrolet Avalanche
2000-2003 GMC Sierra, Yukon, Yukon XL
2003 Hummer H2
with 4.8L, 5.3L or 6.0L V8 Engine (VINs V, T, Z, N, U - RPOs LR4, LM7, L59, LQ9, LQ4)
and Electronic Throttle Control

 


Condition

 

Some owners may comment on an idle instability, low idle speed or rough idle.

Cause

 

Condition may be caused by deposits in the throttle body bore.

Correction

 

Clean throttle body bore and throttle valve plate of carbon using a shop rag and an appropriate cleaner. Refer to Engine Controls Repair Procedures - Throttle Body Cleaning Procedure. This procedure may be performed at any mileage necessary. Check to determine if the PCM calibration has been previously updated to one that includes the update for throttle body coking. For 2003 model year vehicles, look in the operating system portion of the calibration. For 2000-2002 model year vehicles, look in the engine portion of the calibration. If not, then update the PCM calibration to the latest calibration.

Customer: replied 7 years ago.
yea thats mine, if thats so my car shakes when idle and even shut off sometime what may cause that?.... dont mean to ask so many questions
Expert:  Eric replied 7 years ago.

Hi,

 

Below is a repost of my last post on idle concerns for this engine. I would recommend cleaning the throttle body and then having a gm dealership do the PCM recalibration. This should take care of your problem

 

If you are having idle problems, there is a TSB on this issue that states to clean the throttle body and then the PCM is recalibrated-this can only be done at a gm dealership with their software and scan tool:

 

#04-06-04-040: Idle Instability, Low or Rough Idle with Electronic Throttle Control (Clean Throttle Body) - (Jun 14, 2004)

Subject:Idle Instability, Low or Rough Idle with Electronic Throttle Control (Clean Throttle Body)

Models:2002-2003 Cadillac Escalade, Escalade EXT
2000-2003 Chevrolet Silverado, Suburban, Tahoe
2002-2003 Chevrolet Avalanche
2000-2003 GMC Sierra, Yukon, Yukon XL
2003 Hummer H2
with 4.8L, 5.3L or 6.0L V8 Engine (VINs V, T, Z, N, U - RPOs LR4, LM7, L59, LQ9, LQ4)
and Electronic Throttle Control

 


Condition

 

 

Some owners may comment on an idle instability, low idle speed or rough idle.

Cause

 

 

Condition may be caused by deposits in the throttle body bore.

Correction

 

 

Clean throttle body bore and throttle valve plate of carbon using a shop rag and an appropriate cleaner. Refer to Engine Controls Repair Procedures - Throttle Body Cleaning Procedure. This procedure may be performed at any mileage necessary. Check to determine if the PCM calibration has been previously updated to one that includes the update for throttle body coking. For 2003 model year vehicles, look in the operating system portion of the calibration. For 2000-2002 model year vehicles, look in the engine portion of the calibration. If not, then update the PCM calibration to the latest calibration.

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