GM Techline v.2001.09 5 Disk Set

[Pumpman1968]

I "aquired" a 5 disk set of GM Techline service cd's. I havent loaded them yet. Anyone know how far back these go? Obviously, from the title, they include service info on 2001 vehicles. I want to sell or trade them to someone that can use them.....but was also wondering if they are proprietary.

 

[Fedwrench]

I'm not sure if those will still work. Back in the day when service information was written on cds, they had a coded expirationd date to prevent theft and resale. They would only be good for about 6 months. They are GM proprietary if they're the factory CDs.