Recent content by Alexnorton

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    2021 Tahoe LT Duramax mpg/mpd increase after maintenance and software upgrade

    Thanks Guys for all answers. Yes, I have Tahoe 24gl diesel. I’m using it for the long trips not at all in the city. And after some research I found, GM released another update in Feb 2023 that changed the previous vehicle parameters. After another trip I found my mpg get much better than before...
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    2021 Tahoe LT Duramax mpg/mpd increase after maintenance and software upgrade

    Thanks guys Fortunately, I don’t have any warning lights on. Tire pressure is ok Didn’t change fuel type. I drive it about 1000 miles which I did it more than 10 times in the past and filled the tank from the same gas stations. But the results are not favorable. With a full tank I could drive...
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    2021 Tahoe LT Duramax mpg/mpd increase after maintenance and software upgrade

    Last month I had my Tahoe 2021 LT Duramax for routine maintenance oil change in the dealer. It's mpg/mpd changed from avg 30 to 26. The dealer said they didn't do anything. I'm not sure what I should do. Does anybody have a similar issue? Is it maybe because of bad injectors?

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