2021 Silverado Trailboss 6.2L Bad MPG?

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On 3/1/2023 at 8:35 AM, jaxcam02 said:

This is my actual calculated mileage, not the DIC because that is not accurate.

That one huge spike is a cross country trip to the high plateau. Almost all the rest is at sea level in Florida.

2022 5.3, 10-speed and one of the lucky ones without DFM from factory. Everything else is oem.

I like what I see very much.  Leaving California on July 1 and moving to Florida.  With stop and go city traffic get about 11 mpg with my 6.2.  Set the cruise to 8 over the posted speed limit when out of the city and I've seen 24.4 on the DIC for the 50-mile average.  That was driving I-15 north to Las Vegas, which included going up and down mountains.