WELL>>>>>> firmly, I love my truck, it is everything a pickup should be plus some, but…….. GM Lies!!!! Seriously! While I have gotten 21 on the highway once, when i first got the truck (i now have 1900 miles on my truck). But even then, the most i got in town was 12. Now granted it is winter, and my truck is sometimes in auto 4x4, but I drive like a grandmother trying to milk the very best mileage i can just for kicks and the truth is this truck does 11 in city, and 16-18 highway.
I just completed putting a 2.5 inch level on it, and switched to DuraTracs 285R60 20s, and watched my mileage drop to 9ish in town and have yet to try a highway trip with it.
Based upon what i read here---THANK YOU ALL VERY MUCH-- i have not done the recall yet (can you actually get negative mileage?)