Hello, I have a 2019, 2500, 6.4, w/1400 miles. It has the same noise. I have taken it to two Colorado dealerships and the first one did not even look at it, they just said it was normal and sent me packing. The second one looked at it and said it was "normal". The 5.7 purrs beautifully and this noise is not normal. It does stop when the motor gets HOT, not sure why heat would affect the noise other than for a bearing, but from what I have seen in the threads, everyone believes it is coming from the exhausts. The one dealer did tell me they had to remove a transmission from a 6.4 truck and removed the exhaust as part of the job. When the exhaust was reinstalled, the noise was worse. They adjusted it somehow and reduced the noise, but did not eliminate it. I sold a 2016 Ford 3.5 Ecoboost for this mess and regret it. Now I see in the threads there are several "hopefully Dodge will address this" and I am doubtful of that. I don't believe Corporate Dodge/RAM will address as it will set off a recall and cost them to address it. Whenever it costs a corporation, it turns into an uphill battle. Unless, we get numbers to approach them with , nothing is likely to happen. This forum has two pages on this issue? and more on "chirping noise". I am betting there are hundreds with this problem maybe a lot more. I don't know how popular the 6.4 is compared to the cummings, but I have seen this issue on the web, in forums, and when I talk to other 6.4 owners. I don't believe Corporate Dodge/RAM will address this unless we with the problem come in to them with numbers, as a group. If any of you have experience in this area, have access to expertise in lemon laws and consumer rights, or otherwise know how to proceed, I am happy to engage. Thanks!