Amazingly simple enhancement!
Primary purpose was to "tune the Tahoe" for towing. Setup instructions could be clearer: 1. Downloaded setup SPARK went to UPDATE got error "Do not have updates for your vehicle" Call 888-.....Called tech said needed to plug into OBD II port get vehicle files. Got Stock files. 2. Got another message "Need to Charge battery first" Nothing mentions flashpaq needed to be charge? 3. Display Setting does NOT have a EXIT choice when done. Felt the difference immediately on the freeway onramp!!
2011 F-150 6" lift with 35" tires
Shipping was fast, installation was easy. With a lift and big tires my gas mileage went down, naturally, but its not as bad as I though it would be with the tuner. Highway on mileage xs is 14. The tire size was a little tricky, had to mess with it a bit but the closest I got on the speedometer at 75mph is 77 by radar. I can deal with that. Overall I am happy with my purchase.