After what I just witnessed with my neighbor, the 6-speed need to be gone. He bought a 2021 Custom TB. 1100 miles and the trans is toast. He hasn't even made his first payment. Towed his toy hauler once. That was it. He said his toy hauler weighs 5900 lbs unloaded. It is very short. He's only putting small electric motorcycles and 1 or 2 small gas powered bikes in the trailer, along with the typical fluids, foods, etc. His oldest kid is about 12. The people in the family are small and light. I don't see him overloading the truck in payload, tongue, towing, etc. He replaced a 2004 Suburban 2500 with the new Silverado. I feel bad for the guy. I was burned by GM on the 5.3 with AFM back in 2012. It was in a 2007 Tahoe. 6 months out of warranty, but not out of warranty on mileage. Driving home to Chicago after attending a funeral in Salt Lake City. Got off the freeway in Laramie, WY to fill the gas tank and my families stomachs. Get back on the freeway, at cruise control, start climbing a canyon and the bottom of the engine fails. Needed a new engine. It was going to take at least a week, but my wife was active duty Navy and her command wouldn't grant an extension even though she had the leave time available. GM wasn't going to cover the engine, nor any part of it, and certainly wasn't going to help in any way. We were a young family with a 2 year old kid. I ended up downgrading to a Malibu just to get home. Had to pick and choose which items in the Tahoe went into the dealership's dumpster and what continued on the trip with us. Didn't have the time to ship anything because we had to get back on the road immediately, and everything was closed by the time we finished the paperwork on the Malibu. We lost some valuable family heirlooms because of this. It soured me on GM for several years. I avoided anything with cylinder deactivation until DFM came about. I'm only giving it a chance because of the changes in the technology/mechanicals. With all that said, the 6-speeds days were numbered when GM decided to put the 8-speed in the Colorado/Canyon. My guess/shot in the dark is that the Custom Trail Boss will still have the 5.3 as an option. It'll just be the 5.3 with DFM and an 8-speed. Therefore, there won't be much differentiating the Custom Trail Boss from the Trail Boss LT. I think the Trail Boss LT will then follow in the GMC AT4's footsteps and have the 3.0 Duramax as an iron in 2022+. Sent from my SM-N960U using Tapatalk