mcoaker

Man thanks for the feedback. That's just odd because the truck had only been turned off for 2 hours max. And it cranked right up without dragging or anything. But maybe that was it. Just a fluke that hopefully won't happen again

What was the outcome of your issue with the 1 day old 10 speed? Last week I had a similar issue with my 2020 2500 HD Duramax 10 speed. 3 weeks and 1800 miles in, the truck would not move. Had to have it towed to the nearest dealer. Had just launched my boat after a short 2 mile pull to the ramp. Unhooked from the trailer at the house and pulled forward about 20 ft. When I shifted to reverse, the truck rolled forward slightly and then would not move in reverse. Shifted back to drive and it rolled forward. Back to reverse and nothing. Eased down on the accelerator and it was as if the truck was in neutral. Back to drive and after a clunk, the check engine light came on. I was able to roll forward enough to get out of the street with throttle but it would barely move. Like the truck was stuck in 10th gear or something was slipping. Parked it in the neighbors yard and towed it the next morning. Dealership is saying everything worked fine when it arrived. They supposedly backed it off the wrecker normally and it’s been driving fine. Check engine light is off now and the only codes are “low voltage” and “loss of communication”. Any ideas or similar experiences? Very frustrated and concerned. Grateful for any input