Pulling my toy hauler, a Grand Design 21G which is a 27 foot trailer. I get about 8 to 8.5 mph driving 68 to 70 mph on the interstate. With a good head wind, it drops to around 6.5 mpg. Slow down to 60 mph and get about 9. Been in the hills of central Alabama with it and never felt underpowered. Unloaded it will push close to 19. In town it drops to about 12.
I have a 2020 Silverado with the 6.6 gas engine. Have had it for 2.5 years and 23,000 miles with no oil usage. Use it to pull my toy hauler that weighs about 8500 lbs.
I have a 2020 6.6 gas, transmission temp runs about 195, towing 8500 lbs toy hauler or not. Has been that way since new. Highest it has ever been is 205 towing in hillls of Alabama.
Just got back. It shows your speed unit you exceed the posted speed limit. Then it briefly shows the poster speed limit and then your speed in red until you are at or under the limit.
Have found it hard to turn off when not in car play, but seems ok when connected. Had the same problem when I had waze and google maps running on same destination, could here both guidance talking. If I remember right, the speed limit shows a speed limit sign that turns red when you are doing over it with your speed in red. Will look at it closer today.
I have a 2020 like yours. Under 60 mph, flat road, no wind, and cruise control I can get a little over 20. Interstate from home in Louisiana to Houston Tx on i10 @ 70mph average about 18. Any headwind will kill it. It does not like town driving either. Pulling my 8500lbs camper at 70 is about 8.5mph. Last time out had a 15 to 20 mph headwind at that was down to 6.5. It’s not much worse than my 1500 4x4 5.3 not towing.
I’m an old fart. Like chrome better than black and did this. Looks way better. You can get them in an accessory for the 2500 from GM. Used part of my $1000 rebate for these. Not sure how to post a picture.