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Eric, Automotive Repair Shop Manager
Category: Chevy
Satisfied Customers: 32070
Experience:  20+ yrs. experience as repair shop manager and technician.
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I have a 2002 5.3 flex Suburban 4x4 - with 93k The intake is

Customer Question

I have a 2002 5.3 flex Suburban 4x4 - with 93k The intake is making a fluttering / vibration that kicks in qt 1,500 rpm? I haven't clue whats wrong with it - It also has a rough idle
Are there moving parts in the intake? It sounds like a stuck solenoid but way louder!! any ideas??
Submitted: 1 year ago.
Category: Chevy
Customer: replied 1 year ago.
Its not anywhere is the serpentine system - Not the fan clutch - Not the exhaust shroud
Expert:  Eric replied 1 year ago.


I am sorry that you have not been helped yet. I just came online and saw your question.

What you are describing is a faulty IAC (idle air control) valve. This is located at the throttle body. It has a pintle on the end that when it sticks will create this type noise/vibration and will cause a rough or erratic idle. I have uploaded a diagram of its location. You will need to replace it

Expert:  Eric replied 1 year ago.
I noticed we have not yet resolved your concern you asked about. I would sure appreciate it if you would reply so I can offer my skills and knowledge and repair guide access to help as best I can.
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