Ticking noise when starting and idling engine

[Black Smoke]

I have a 2012 Silverado 1500 with the 5.3 gas engine with 100,000 miles on it . A year after buying it new it started a clicking noise that came from underneath the passenger side of the truck when it is cold. I took it back to the dealer while still under warranty to get it diagnosed and fixed. They kept it overnight so they could start it cold and hear it. I went back and the technician and shop manager told me it was an emission valve clicking that sends gas fumes to the charcoal canister. I said replace it. But they told me the new one would do the same thing. Now I’m very tired of hearing it and I want to fix it. What is the best route for this?

[CamGTP]

Well, why not replace that part and see if it actually does fix it?

 

How can we diag the problem through a keyboard? The dealership may or may not have told you the truth when they tried to figure out the problem. If the new part makes the exact same noise, then they were right and you will have to live it.

[Jworks]

My 2011 has that at times and not at times when I start up.  But on the driver side.  I don't hear it after the motor warms up some.  I've been told its a lifter and is a common issue with 5.3 engines.  I've been driving it since I bought it used in 2019.  "If" it is a lifter the dealership told me it would likely fail at some point and to fix this is about $2800.  My independent mechanic said his truck has it too and I should just drive it because that was what he called the "Chevrolet tick".  I'd be interested to know how yours turned out.  Interestingly enough my niece has a 10 year old Ford F150 that had this same issue.  Hers eventually locked up and ruined the engine, which she replaced with a Jasper engine ($8k).  So, I'd be interested to hear how yours turned out being my reply is 11 months after you posted.