Got a wierd one. I'm trying to download the program on my mother's 2008 Silverado to change the tire size, but EFI Live apparently can't read the computer. It has no problems reading my own 2000 Silverado. The unit is able to read the truck, but my laptop can't read the unit from there. I'm sure it's a bonehead on my part, can anyone point me in the right direction? Thanks.