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I had the SRS warning go off last week. Suspecting that the fault might be in the driver's seat wiring, I pulled the seat out and unplugged and replugged every wiring connection between the seat belt pretensioner, the airbag and the connection between the seat and main body harness wiring, then re-installed the seat. (Pulling the seat isn't necessary but it's a lot easier to check all wiring if you do.
It appears that whatever had caused the warning light to activate was fixed, beacause I then took the car to the local Ultratune and the Tech 2 was hooked up. There was an error code in the history, but the fault no longer existed. The fault code was cleared and I was on my way. Five minutes, no cost. Things have been fine since.
I would imagine that any Ultratune would have this equipment as they cover such a wide variety of cars. Whether you are as fortunate as me to be able to have faults cleared for nix is another matter, but it certainly doesn't require an expensive visit to your local Holden dealer.