Fast69Mopar
Senior Member
I second this post by @Liver. My bet is the seal and bearing in the water pump. Here lately in Texas at my dealership I have had to replace quite a few 5.7 water pumps for this exact concern. Then, just a few days ago, my 5.7 water pump started doing the exact same thing on cold starts or if I let it sit for over 4 hours.I bet it's your water pump I have a 2017 Laremie.
With only 4000kms my truck was doing exactly what yours is doing.
Got it replaced under warranty and the squeak is gone.
Apparently they had a batch of faulty water pumps on that year of truck.
If your new dealership needs help with their diagnosis tell them for a small consulting fee that @Fast69Mopar will assist. Haha