It’s not your engine, it’s the doser injector that pumps def fluid into your dpf. Totally normal operation. If you don’t hear it, your exhaust system would clog up and you’ll have check engine lights until you’re on the side of the road in derate mode.
This will blow your mind. My 2016 GMC HD2500 6.0 gas burner does a similar thing. I changed the oil with the same oil and same brand of filter that I have always used and it started doing this. It has 58,000 miles on it now.
Thanks for showing this. Exact same sound on my 2022 3500HD with 6000kms, took it to the dealership they said its normal and gave a brochure showing Duramax ticking sounds. They should have gave this before I bought the truck, not after. My2006 LLY never done this, so much for feeling proud owning a new top of the line GMC when your stomach turns every time you start it.
2006 lly does not have a DPF or systems to reduce emissions besides EGR. The ticking noise is normal it is the hydrocarbon injector just sprays diesel to heat up the DPF to burn the soot. Then the reductant injector also sprays making a tick noise to reduce NOx .
My truck does the same thing I took it several times to the dealership they said it’s normal. But I think something might be wrong someone said it might be the lifters.
My “22 silverado 2500HD had horrible engine noises. GM said it was normal. Needless to say, I traded it in with 5,800 miles on a Ram 2500 and there’s been no looking back. My silverado had some serious quality issues.
That noise is from the hydrocarbon injector spraying fuel to eliminate the soot, and the reductant injector spraying DEF to reduce NOx an emission. Most Diesels after 2007 half have these , Dodge and Ford have these as well. Guessing it’s less noticeable due to location on different makes.
My 2022 2500hd does the same thing. I took it to 2 dealers and they say it’s normal. I have noticed if I hear it when I first turn it on, I can get it to go away for a little bit by turning off the truck then back on. But will eventually come back. I hear it in the exhaust system. Post if you get an answer
Same with my 2023 2500 HD. I have not taken it in, because I was wanting to figure out first if it just a normal Durmax sound or what. None of my Cummins RAMs ever had this sound. They did have the DEF tick sound but not this one. My changes with RPM both acceleration and deceleration on downshifts. It becomes almost a flutter when the RPMS are just right. Real high RPM it seems to disappear. Very odd sounding to me.
My 2022 just broke down went limp mode w emissions problems after month @ dealership for repairs. came out making same similar knocking nose. Was told same B.S. its normal, but now engine light came on... now what next?
My 23 2500 with the duramax does this too and it only has 600 miles on it, rear end clunk when turning and hitting bumps too, not too happy with gm, also the rear doors sound cheap and “echoey” when shutting them….the seat belt chime won’t go off until the door opens. Anyone else experiencing these issues?
So I had that clunk of my 22 along with leaking transmission fluid out of the back of the transfer case. Rear suspension needed to be retorqued with only 2,000 miles and slip yoke at transfer case replaced.
Define normal. Normal as in “the DEF injector makes that sound sometimes?” Or normal as in “today I want you to call me ‘they’?” Personally I would never call that “normal.” Maybe “annoying” or “bullshit.”
Just heard my brand new one doing this too.. gmc dealership says they don’t hear anything and everything is operating fine.. so much for a brand new truck.
People said this is normal, but the thing is that if I turn off the engine and restart again the noise goes away, also if I drive for a while the noise went away with the engine fully warmed up. I am guessing here that GM control software is a bit off on turn off things when not in driving mode.
