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What fuel economy is everyone seeing on the '21s?

To keep the thread organized and informative, please post:

1) What your drive routine is like - mostly highway? All city? Often towing a trailer?
2) Which model you have
3) What MPG you are seeing
 

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Here are some baseline numbers based on what the EPA reported to start us off:

"The 2021 Chevy Tahoe returns 21 miles per gallon in the city and 28 mpg on the highway for a combined rating of 24 mpg for the rear-wheel-drive model. Four-wheel-drive diesel Tahoes see a slight drop, returning 20 mpg city, 26 mpg highway, and 22 mpg combined. The larger rear-wheel-drive Suburban suffers slightly, returning 21 mpg city, 27 mpg highway, and 23 mpg combined. However, the four-wheel-drive Suburban has the same fuel economy rating as the four-wheel-drive Tahoe.

The 3.0-liter Duramax first appeared in the 2020 Chevy Silverado, and it has the same output in the SUVs – 277 horsepower (206 kilowatts) and 460 pound-feet (623 Newton-meters) of torque. Chevy did tweak the mill for the Tahoe and Suburban, adding a new engine control module and reducing engine noise. The mill pairs with GM’s 10-speed automatic gearbox, with the Suburban and Tahoe offering 8,000 and 8,200 pounds of towing capacity, respectively, when equipped with two-wheel drive."
 

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2021 Z71 5.3L, right off the lot, all freeway 15mpg all the way home. Had for it a couple of weeks now, 457 miles total, 13.9 avg mpg. Tire pressure 35 in the front, 33 in the rear, ride height set to normal, drive mode set to normal, 2wd selected. Not sure what I'm doing wrong but I'm not getting anywhere near the epa estimates.
 

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2021 Tahoe 4wd Premier. 1000 mile so far. Mostly small town and 65 mph two lanes, but a few distance trips (50 mi) at 75. 20.4 avg overall so far. Mine has the smaller gas engine.
 

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1) What your drive routine is like - mostly highway? All city? Often towing a trailer? A combination of freeway and highway
2) Which model you have:
Tahoe RST 4WD duramax
3) What MPG you are seeing
22-26 depending on the amount of highway.
i have approx 2k miles on it now and the overall average MPG is 24
 

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We just returned from a week long trip from NC to NH/VT and back.

21 Tahoe High country 4wd 6.2L with CAI and pedal commander, the avg on return was 22.5 MPG.

The interstate north of NC is mostly 55 and 60 mph so we normally do 9 miles over and had the adaptive cruise on.
Also we only use premium fuel, 91 or better and it has been mostly 93 octane.

Only had the Tahoe for a month and was built 6/21, almost 3000 miles on it now and was in the 500 range before we left.

451
 
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