Hello all,
I'm having the same issue. The noise is usually in the mornings and seems to be coming from the back of the truck when in motion at low speed from a cold start. The noise goes away after a while, but the noise is a complete sore and the truck has only 3000 miles.
I have taken the truck to the dealership and had one of their techs ride with me, but the noise can't be replicated. Needless to say it is very frustrating, specially on a brand new truck that cost that much money.
I will be checking my shocks in the morning and visiting the dealership. Hopefully they can do something with the information about the shocks and take care of it.
I like the truck, its my second GMC Sierra, but I'm extremely disappointed that I'm having to go through this on a new vehicle.
Will post a follow up once I get with the dealer.
2014 GMC Sierra 1500 SLT - Z71