OS Code Modifications?

[mjc79]

Just noticed these were populated under the OS tab after I've already tuned my vehicle. What do these mean and do I need to do anything with them?

They read as follows:

Speed Density - Enhanced
OS: 1272013

[Apply Code Modification]


Speed Density - 2 Bar
OS:. 1252013

[Apply Code Modification]

[blindsquirrel]

http://www.hptuners.com/help/vcm_edi...ters_gm_os.htm