Kevinsgmc2020

I’m having a bad shudder on my 2020 Sierra dually duramax with 10 speed. Delear feels it also and is worse in tow mode. However they say it’s something they never heard of. Trucks now at delear three days and they say could be weeks. Only 8000 miles on it!! Very aggravating!!!

I’m experiencing same thing but I have a 2020 dually Sierra duramax 6.6 but with 10 speed trans. If I ease on the gas it’s almost like a bucking or like the motor is lugging. Been at dealer for three days and they are sending data to Gm engineers. Tell me I may not have truck for a week or two because there are no codes to point to the problem. Idk. I’m not a happy camper. Truck cost 90k$ and need it for work. They want to give me a loaner Acadia!! It’s a joke !!

8070 miles So as I take off from a stop sign the truck seems to be lugging and I guess you’d call it bucking. If I hard accelerate it goes away. It’s only at low rpm. It’s at the dealer now for three days and they tell me they are talking to Gm engineers and truck could be there for a week or two minimum! Obviously after spending 90k$ Not what I want to hear. They’ve never had this problem before. I did need to put it in four wheel drive for a few min to get out of some loose sand on construction site. But put it back in 2 wheel with no problem. Anyone have this problem. Of course I’m also supposed to be going on a 1500 mile trip in ten days. Not feeling real comfortable with this truck now!! Please help!!!

Same issue. Thought it was me. 90k on a Sierra 3500 dually and can’t tell when my phones ringing!! Very aggravating!!