Astra J
Services and Retrofits
The Astra J introduced a whole new type of diagnostics and programming system and is significantly different to the Tech2 based system used on earlier models.
GDS2 replaced Tech2 for fault code reading and diagnostics.
The majority of programming is now done online using VCI codes which can make some retrofits a 2 step process where a code VCI code is requested and once received the code is programmed into the vehicle.
