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Was about to say - its the handbrake that does it. Happens to my car too - took it in to the dealership and they could not find out what the fault was... If you "rip" the handbrake on (so you hear that click sound) it'll happen - try pulling the handbrake up with the handbrake release button pulled on too so it goes smoothly - doesn't cause it to alert...
Apparently its no issue - but it's been suggested by a friend of mine to have a look at the center console stab control switch etc...
Update: Car was back at Holden today to rectify some minor issues (trims). I was able to sit in the carpark and just pull the handbrake on (while engine is running) and create the issue everytime. The techs seemed to have localised a fault with the YAW sensor or wiring harness. It rebooked for the 27th June so they can pull the centre console out to get to the sensor and harness to check.
What ever they did today though has stopped the issue occuring at the moment. I'll report back after the 28th.
Cheers
Phil