Here’s the tutorial on programming key fobs for older GMs using Tech2win software.
Model sample: Saturn Ion2 year 2007
Credit to Mr.GENMOTMAN.
Purpose: Program Key Fobs
Insert VCX NANO GM and run VX Manager Software,
Turn ON the ignition with the engine OFF
Run Tech2Win program as per VCX NANO instructions
Main Menu > F0: DIAGNOSTICS
Body > F0: Body Control Module
Once learned, the Tech2win will let you know if it passed or failed!