Hello I will help you with your question,
For the 4door, 5door and the convertable this is the procedure to deactivate the OnStar system
Look it over and let me know of any questions you may have.
2000-2002 Saab 9-3 (9400) 4D/5D; 2000-2003 Saab 9-3 (9400) CV
Body - Interior equipment - Adjustment/Replacement.
Important: Secure the wiring harness so that there is no risk of chafing and rattling.
The SRS module has a connection that needs to be unplugged, I will repost the TSB and please print it if you need the images as they do time out
I have always done the entire procedure so I don't know if there would be unintended consequesces if you only do part of it. The Onstar is interconnected to several systems and if they woke up and found it missing without it being disconnected they might have a problem with that
If you are using google chrome that is the problem, here is a .pdf with the same info