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Shudder at idle. Clicking in Engine. High pitched whistle on passenger side..

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Posted (edited)



I have a 2017 GMC 1500 with the 5.3 V8 ecotec engine.


After a long run and the truck is nice and warm, I've noticed that there is an intermittent shudder when the truck idles. It is barely noticeable when cold, but after running a while, it becomes very apparent. Its a slight shudder every 2-3 seconds.


I popped the hood and noticed that on the passenger side of the engine, near the air box, there is a slight whistle that is constant. I also noticed the 1 second click (I assume is the direct injection) is much louder than it used to be. Then I noticed on the drivers side of the engine, there is more rapid clicking from the engine.


It is under warranty. The dealer says its either "normal" or "can't reproduce problem". I've opened a ticket with GM directly but they have been slow to get back to me.


Any ideas one what these symptoms could mean?





Edited by Baytrucker

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