Truck was tuned when I got it

Hello

I have a CPS5 EFI live tuned truck that I can't make any changes to.

I assume the answer is I need to buy a handheld EFI Live tuner to edit it and even still the tune might be locked but since I'm not 100%, I'm asking.

How can I tell if the tune is locked?

I have another brand tuning system and it won't read the ECU, presumably because the EFI Live is flashed.

EFILive writes to non-readable ECM memory for CSP tune files. EFILive, and other tools will be unable to read the tune file. You will however be able to flash over the file.

Cheers
Cindy