TCM Security Access Denied

Hi,

I was trying to tune my Brother in Law's 2010 Silverado, but when I was trying to Read it, it shows this window
http://i775.photobucket.com/albums/y...SilveradoM.jpg

What can I do?

Thanks
Sergio

this is the same issue i am having with my truck a 2010 silverado. one guy said he had this issue and removing the DIC fuse allowed him to read and write once the fuse was removed. that did not work for me. i had the dealer flash my truck and they had no issues accessing it but i still cant. if you figure anything out please keep my updated. thanks!!

email support.

I'm having this same issue. I had a set of locked ecm and tcm that I sent back to the tuner and had them unlocked. I got them back and I can read ecm, but gives me the above error when it goes to read tcm. I called them and they said they didn't and couldn't lock tcm.