Jump to content
  • Sign up for FREE! Become a GM-Trucks.com Member Today!

    In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. 

IAC, idle issues 2000 Silverado 5.3

Recommended Posts

I have no codes. Truck has over 300000 miles. Runs good with an intermittent idle issue where it goes up and down. Doesnt change much when AC is on.

Is there a way to test IAC with a meter?

I have checked plugs, wires, sprayed engine with cleaner looking for vacuum leaks, to see if idle changes. Air cleaner is good..

But no codes..

Have not checked fuel pressure. I will Monday.

Other than that, I want to check IAC if its good. Is there a Meter test to look for Ohms on the pins?

Link to comment
Share on other sites

Have you checked the compression, or done a leak down test?

Sure, the engine is electronically controlled, but don't forget it's a mechanical device with a lot of time on it. What you're seeing is very possibly the computer trying to correct for low compression.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Forum Statistics

    Total Topics
    Total Posts
  • Member Statistics

    Total Members
    Most Online
    Newest Member
  • Who's Online   3 Members, 0 Anonymous, 448 Guests (See full list)

  • Create New...

Important Information

By using this site, you agree to our Terms of Use.