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I'm not to happy. I getting on avg. 13 mpg. I was getting better mileage prior to having the "clunk" fixed. I have 7500 miles on it and it will be a year old.
I got better MPG with my 05 Escalade then the GX but I love the GX more.
Actual calculated mpg at last fill-up was 14.8 with almost all stop-and-go driving, although dash computer said 15.9. I have gotten 19.8 mpg according to the computer while doing long trips of all-highway miles, but it seems like the computer is a bit optimistic.
Normally in NY State, I averaged 17.4 mpg. On my trip out here to CA, I got as high as 19.3 mpg, and that was travelling at 75 mph with the A/C on. But that was on flat interstate roads in Iowa, Nebraska and some of Colorado. Usually I got the usual 17.5 mpg. Also as expected, some of the I-70 passes in Colorado took the expected hit in mpg.
I get 15 to 16 mpg going back and forth to work (mixed city & highway), and 20 to 22 on a 100% highway trip if I respect the speed limits. These are calcuated at fillups - the dash indicator is always a couple of mpg higher than I calculate.