I am at 7600 ft+. I go to Denver about every other month. 5600ft and my trip to Grand Canyon varied but they were 23 mpg.
My elk hunting where I am at 17,000 pounds is going over two 10,000 ft passes the rest of it varies from 5000 ft to 8000 feet. 300 miles each way That varies somewhat between 13 and 14 depending on how heavy my foot is. These are not one time trips. This is what truck computer is telling me.
Before I had this Chevy, I had a 98 Dodge diesel, 5 sp Std, Stock rear end . It got 12mpg pulling the same load, same trips and about 18 on open hwy.
Here where I live its up and down and I don't get quite the open hwy mileage.
Different gearing makes a big difference.
Last edited by saddlesore; 09/12/22.
