B blanier87 New member Joined Dec 19, 2010 Messages 1 Reaction score 0 Points 0 Age 38 Dec 19, 2010 #1 I have an 2008 Silverado Z71 LTZ Crew Cab and was wondering which programmer will give me the best fuel mileage increase. Any help would be appreciated!
I have an 2008 Silverado Z71 LTZ Crew Cab and was wondering which programmer will give me the best fuel mileage increase. Any help would be appreciated!
