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17 MPG city driving (not 22) on 2021 Sierra 1500 AT4 diesel (3.0)

domerdel
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Booger T Enthusiast

Booger T

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IJust checked my chevrolet app and it says that I was enrolled in smart driver on the day I took delivery. Don't recall doing anything special. This is what the page looks like on the Chevy side.

IMG_1389 my chev app.jpg

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Grumpy Bear
Grumpy Bear

Winter summer swing is more about lubricant temperatures than fuel composition. Four plus years of my gas motor mileage. Can you pick out the summers versus the winters? I don't warm up anything. Star

Xterrable
Xterrable

My AT4 came with the Goodyear "street" tires.  One size smaller then the Duratracs.  I think they were 265/65/18.  I was getting a pretty consistent 22 MPG up to 31.5 MPG at 55 mph for over an hour. 

Grumpy Bear
Grumpy Bear

Oh boy yes and wheel bearings never reach summer temperatures. I do coast down test often. The difference in a fully warmed truck at 85 F and one fully warmed at 0 F is over 100 yards from just 45 mph

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mjonesjr84 Enthusiast

mjonesjr84

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Just now, Booger T said:

IJust checked my chevrolet app and it says that I was enrolled in smart driver on the day I took delivery. Don't recall doing anything special. This is what the page looks like on the Chevy side.

IMG_1389 my chev app.jpg

Interesting. Maybe it is because mine is setup as a fleet. 

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