Just found this forum. Love it. Had a 09 5.3 cc, 3.42 4x4 BBP tune. Stumbled on a '12 w/6.2 NHT,3.73. Factory GM CK988 rims. Same exact truck, just 3 years newer , less miles, and the magnificent and wonderful 6.2!! Wasn't really looking but it was sitting at a Ford dealer. Pulled the trigger back in Nov. Already did the BBP tune on the new one. Wow. This thing is amazing. Justin at BBP is the man! Totally recommend him! My mileage has been a bit lower than what has been reported on here, could be the -20 temps we have been having here in MN. Learned a ton from this forum. Just got done reading all 49 pages. Thanks guys.