My Astra Sri did not have cruise control when I bought it. I know cars with the fly by wire throttle (electronic) can have it fitted easy enough. All thats needed for this is the cruise control skalk, and clutch switch. These are cheap enough from the main dealer, less than £50. I fitted the stalk and clutch switch and took my car for a test run. It worked straight away 😃 . This mod can be done on the 2.2 car from the Vectra to Astra and others.
Parts needed:
Cruise control stalk
Clutch Switch