Recently broke-in my 6.2 with a 10 speed. I found the truck liked to run 1300-1500 rpm. Around town driving I could hit 3500 rpms at a stop light, but that quickly gets you to the speed limit. Then 1300-1500 rpms. Even on the highway, 75-80 mph would only get me to 1800 rpm. I found running in tow mode would vary the rpms 1500-2500 rpms, 3500-4500 at takeoff. Sport mode was not as effective at varying the rpms. Note: I always disable the auto engine shutoff.
2020 AT4/6.2L/10 speed. Just drove from RI to VA, light traffic, 670 miles. I mostly used cruise control, 5-7 MPH over the speed limit. I averaged 22.7 MPG for the trip. The truck has 1500 total miles.
My MX4 came with the larger rubber blocks and separate instructions to install on 2019/2020 GMC/Chevy. With the rubber blocks, it rests on the back window.
https://www.gmsupplierdiscount.com/build-and-price/ You can go to the GM Supplier Discount website, build the exact vehicle on the lot. (Does not work on a mobile device, Only works on a computer). Will give you a pretty good estimate of a good price. Somewhere between that price and MSRP, but who knows, you may be able to negotiate a better price.
I purchased an AT4 two weeks ago. During the purchase process I spoke with many different dealerships. Two of them said Chevy/GMC trucks will not be built for at least 3 months, while the catch up with other models. I think this fits with shifting to 2021 models. Or they told me that to get me to buy on the lot....thing is, they said almost the same thing.
I really like that color as well. Only thing I didn’t like about it was the black door handles and mirrors. The blue has a nice metallic to it. My favorite Trail Boss is the Midnight Edition Black