I purchased a new 2023 gmc sierra 2500 duramax and have only 3,500 miles on it. It started having a loud annoying humming sound on cold starts. Has anyone figured out whats causing it? Appreciate any help
I got the same noise with my 2023. What ended up being the problem? Truck has been in the shop for a week and we cant figure it out. Any help would be greatly appreciated