This verifies shop or whoever they had tune the PCM locked it so that no others could download the PCM to either see the tune or to properly tune it.

This caused the C5 owner to yank the PCM out and ship it to us.
We then checked with LS1edit and Tunercat and as seen below both tuner programs could not even tell what type of car or year.
This forced us to purchase a new PCM, tune it from the blind, ship back to customer

He then had to go through the car's relearn process, do scanner testruns and then we had to tweak the tune and via email send him updates to clean the mess up

This cost customer more down time until this all was done and the additional costs.
Uncalled for shops to lock PCM so that only they can access the PCM calibration. Generally I see this when the reason for locking is so no one can see how bad the tune was and what they did wrong or lack of real tuning experience causing poor tuning which can cause major engine damage

Rated a double screwover