Transmission Not Go Into Gear problems of the 2019 Chevrolet Silverado 1500

This truck continues to slip out of gear when trying to accelerate. Yesterday, as I attempted to cross a road, the transmission was "hung up" between gears resulting in a very dangerous situation where I was unable to move until traffic came much closer. It started from a stop and when I tried to cross the road it was shuddering between gears. This continues to happen on this vehicle. Sometimes it's a hard shift, other times it slips out of gear and as I push the accelerator, the engine revs and it is not in a gear and it finally grinds into a gear and then there is a jolt when it slams into the gear and the truck lurches forward or sometimes it's enough to squeal the tires.

When I take off the truck jerks and shakes until about 5-10 mph. It sees like the transmission is not going into gear. It happens when I first take off to go.

Hard shift from 1st to 2nd and sometimes 2nd to 3rd causing the engine to rev high - city driving. When towing boat in tow or camper in tow mode, transmission will not switch gears when it should causing high rev - city and highway driving. Dealership has had it multiple times but find "nothing" wrong every time and then it shifts hard upon leaving the dealership. This happens frequently throughout the year regardless of the weather.

When putting vehicle in drive from park it jumps forward even with foot on the brake. When going from reverse to drive it feels like the vehicle is not in gear and then engages and then the vehicle makes a clunk noise and abruptly jumps forward. There is also a issue when going from first to second when accelerating and the same when downshifting. The transmission on this vehicle is very erratic in nature, you never know what it is going to do every time you drive it. This has been happening since the first 100 miles and I now have 8600 and still happening. I have taken it to the dealer and they stated they could not get it to repeat the issue even after letting it sit outside in 20 degree weather to cool everything down.

The 8 speed transmission sometimes gets hung in between gears or shifts very hard after it intermittently comes out of gear. This week, I went to cross a road on dry road conditions and the vehicle came out of gear, the engine revved and I was without a gear for 2-3 seconds, causing the oncoming traffic to be uncomfortably close by the time I regained power and was able to cross the road. There have been other times that I have been at a stop sign and I go to take off and the engine revs up as I hit the gas but it is not in gear and then abruptly snaps into gear, causing the tires to actually squeal. So this issue has happened when the truck is still moving and also when it was at a stop sign and not in motion,.