Fuel efficiency drop in newer models ?

[WalleyeMikeIII]

I get about 32 with the cruise at 60 or so, on level ground. 2022 5.3 Tahoe, 4x4.

I am not sure I believe that...you have the distance set at 25 miles, so computer calculating your BEST 25 mile score and your AVG over the last 25 miles driven.
Flip the page to the screen on the current drive or for Trip A, and see what the computer calculates the MPG for over 200-300 miles...
I'd be seriously impressed if your Tahoe averaged 32MPG over a 200 Mile drive...

 

[Big Mama]

The only way Big Mama could get 28 mpg is if I was going downhill with. 60 mph tailwind and the GM optional sail package was activated. Your 2018 is incredible.

 

[vcode]

I am not sure I believe that...you have the distance set at 25 miles, so computer calculating your BEST 25 mile score and your AVG over the last 25 miles driven.
Flip the page to the screen on the current drive or for Trip A, and see what the computer calculates the MPG for over 200-300 miles...
I'd be seriously impressed if your Tahoe averaged 32MPG over a 200 Mile drive...

Agreed. No way will you get better mileage than a diesel. No way. If that is real, GM would buy that truck for a million bucks to see what magic is going on there.