Gas Mileage on a Denali?

[WHEELMAN322]

I'm surprisingly relieved...I'm averaging 11.6 mpg with 350 miles on the clock. I don't have a light foot either. I've been breaking it in gently, but on the highway I routinely run between 80-90. This truck is no worse than my Tacoma was. Actually my V8 Infiniti only pulls 13.5 with mostly city driving.

 

[Rollin Thunder]

my sierra denali gets 13.4 average, and i have a lead foot.

 

[gmcul8r]

12.1 for me on my XL Denali. 95% short trip, city driving with alot of hills.
I also have a GM CAI & a Superchips Flashpaq.

 

[spencer m]

well my denali has 22000 miles, and i can get 18 mpg at 80 , and ive seen up to 19.5 at 70 (with cruise), but its not very good in town, ... but i do like to drive fast...

for you it should get better

 

[Silveradolt18]

I am at 3000 miles - first oil change last week. I am averaging 14.2...I will sometimes see 19 on the interstate.

Better than my 5.3 sierra with the AFM which is at 13.7.

 

[Getwired]

Welcome, Silveradolt18. Good choice on the ride! I got 15.5 around town this afternoon in my XL Denali... 10K miles on the clock...

 

[jperaino]

2008 Yukon Denali. 400 miles 11.8 mpg.