2020 GMC Sierra 1500 3.0 Diesel Everyday Mileage

[Sierra 3.0]

I have been trying to keep track of my mileage each time I fill up. I posted my towing mileage a few weeks back and thought I would post my hand calculated mileage for non towing, everyday driving along with what my computer reads.

 

Everytime I fill up I set the pump to fill then when it shuts off I wait 30 seconds and let it run again until it shuts off. I then take a picture of the gallons on the pump and my trip odometer for that tank. I then reset my trip for the next tank.

 

I commute to work M-F and then drive the family around on weekends. My commute is approximately 30 miles one way and I drive a mix of highway/back roads and in the city. For those who are curious on what you might expect if you purchase a GMC with the 3.0 diesel here are the results.

 

I kept track of 4224.7 miles of general driving with my truck.

 

I used 170.203 gallons of fuel. My hand calculated mileage was 24.82 and the trucks computer read 23.69 MPG.

 

I have about 8200 miles on my truck as of today.

 

Attached is the spreadsheet with all the details.

 

 

Sent from my SM-N950U using Tapatalk

 

 

[AT4 Duramax]

I know you post is old but that's awesome to see.  I've been at 24.xx combined on my first tank of fuel.

 

[mark1968]

Yes this pretty much fits my experience so far around town and a bit of highway. We have 9k miles on our truck. And i do agree, hand calculated seems to be higher than the truck computer. We love our truck.

[afterburner82]

I drive 22 miles each way to work and I’d say 75% interstate and 25% city/state route and I’m getting 26 to 27.5 mpg and am at almost 11,000 miles.