2019 Red

Thanks for your response, we finally have truck in for service, now we wait. I honestly know nothing about transmissions but I believe everything you mentioned could be possible except #4. The last episode happened in loose gravel and it was definitely throwing rocks with both feet on the brake pedal.

I have a 2019 Silverado 2500 High Country that we mainly use to pull our 9000-pound travel trailer. It does a wonderful job doing towing and we love the truck. It has just over 67200 miles on it. It has 6.6 Duramax diesel with the Allison transmission. over the last month on three occasions, while not towing, when we made a stop, it has seemed the transmission did not disengage. I had to almost stand on the brakes to stop but the rear wheels kept slowly turning. The first time, when I let off the brakes, the truck lunged forward. The other two times I have shifted to neutral to release the transmission. My truck has been parked for a month waiting to get into the GMC service department where we bought it February, 2022.

New member here. This is my 5th "Bowtie hauler" and so far, this one has been just as awesome as the others. We bought it in February 2022, Paid WAY too much(pandemic price) but we need a 2500 tow vehicle. The main job is towing a 33 ft. travel trailer, but a comfortable ride is nice as well. We're loving the High Country Package.

I have a 2019 Silverado 2500 High Country that we mainly use to pull our 9000-pound travel trailer. It does a wonderful job doing towing and we love the truck. It has just over 65500 miles on it. It had 6.0 Duramax diesel with the Allison transmission. over the last month on three occasions, while not towing, when we made a stop, it has seemed the transmission did not disengage. I had to almost stand on the brakes to stop but the rear wheels kept slowly turning. The first time, when I released the brakes, the truck lunged forward. the other two times I have shifted to neutral to release the transmission. My truck has been parked for a month waiting to get into the GMC service department where we bought it February, 2022.