2009 GMC HD3500 newbie

[Supermoto68]

Hello All, Thank you for the add. My truck is a 2009 but I have just passed 50k miles. Lifted with 33’s and 100% stock power plant. I am here to learn the right steps in gaining better MPG. Currently only getting 11 mpg

 

[2004LB7]

Highway, city or combined?

Mine with mostly city gets close to the same. If I do mostly highway I can get closer to 18

 

[Supermoto68]

I

Highway, city or combined?

Mine with mostly city gets close to the same. If I do mostly highway I can get closer to 18

I drove it to Ohio in July did not really change MPG in that long trip, drove straight through 18 hours