can we do this with our software? will allow 03-07 GM trucks to run E-85 in their stock vehicle without having to purchase expensive conversion kits. This tuner modifies stock PCM programming to allow components that already lie dormant in these trucks to pick up and use ethanol in the fuel line. In the old days, this would been impossible due to the use of organic rubber in vehicle fuel lines, but for the last 10 years GM has been including synthetic fuel lines and ethanol sensors in these vehicles STOCK! Run E-85, Support America!