Originally Posted by
djv86
i got a mpvi pro used in original box. came with a white usb flash drive. i installed the drivers via that usb. i am currently using 4.0.12 vcm suite and the mpvi pro has a hardware and firmware of 0121. when attempting to read my 2000 suburban pcm it says " detect protocol failed " is there something i am missing or is the hardware and firmware on my device not compatible with the version of vcm suite i have ? is there a chart or any information about which firmware is compatible with which version of vcm suite ? any help would be appreciated. thank for reading.