... is up! My lift pump went out about a month ago. Took out my XZT and gave it to my dad while my truck in the shop (Ya, he's not giving it back). I've been running it stock since then and got 18.5 MPG on my fill up this morning. Typical driving, no long trips, no changes in my heavy foot and it's up from an average of 15-16. I know they re-flashed it @ the dealer because my seatbelt chime is back on.

Anything like this happen to anyone else? I didn't think I'd gain MPG by going back to stock.

 

My mileage also went up after my truck was converted to the in-tank lift pump.