I downloaded a friends 2003 lb7 calibration, made my changes, then tried to upload the modified calibration and I got a bootloader error message. It also said the ecm was locked. I checked the Pcm Security tab and it says it is unlocked. The seed is $3125. He told me that the dealer replaced his dash gauges last year and had to reprogram them a few times before they would work properly. He has never plugged in any type of programmer himself and as far as I know he bought the truck new. I also tried to download the stock calibration from the truck again and I got the same type of error message. What do I need to do to recalibrate his truck?