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!!
I was tired of using manual M5 to disable V4 mode every time I got in my truck. This Range devise does a excellent job of disabling V4 mode. I don't care about mileage because if I did I wouldn't have bought such a large vehicle but I have not noticed any difference so far because the truck has a six speed transmission. I could feel the V4 mode going in and out all the time and the vibration that happens because of it. This is a great product and I got for a great price on Auto Anything.