Lesgoobaby

I took my brand new truck to the dealership and they said they had to slightly tighten the U bolts to spec. Nothing too bad. But the vibration is totally gone and the transmission doesn’t feel like it’s gonna fall apart. It’s driving like it’s brand new for the whole last week. I think the extra weight in the bed and loose u bolts were the problem.

Hey guys, so I have a 2023 Sierra SLE 1500. I only put 11000kms before experienced the vibration/shaking. I thought my transmission was faulty. WOT was smooth af, so I was super confused why the transmission would do this at low RPMs. If this helps anyone I read the U bolts could be the culprit. I had been riding around with 200lbs of sand in the bed for the last 2 months and thought it may be putting too much weight on the U bolts if they are loose. I took out the sand and the vibration is mostly gone. Very slight if anything which I think I felt even when it was new. I am going to take the truck into the dealership to get those looked at and see if they need to be tightened. Would do it myself but I don’t have any tools. Hope that helps as it solved my problem 90%. P.S I had a 2021 gmc Sierra sle 1500 aswell after I put sand in the bed, I got the same vibration thinking the tranny was bad. Never connected the dots with this one until I removed it. That truck still left me stranded lol due to a not starting issue multiple times before I auctioned it off. I had replaced the starter on that and it left me stranded again with the same problem lol.