HSV Maloo Problems
No car is perfect, but we've gathered everything relating to the HSV Maloo reliability here to help you decide if it's a smart buy.
HSV Maloo: Engine fault code
I think you could be looking in the wrong area. U2105 is an engine fault code, which perhaps helps explain why it comes on under heavy acceleration or travelling uphill. I would have a diagnostic check done on the car to see if you can better home in on the cause of the problem.
Long term value of HSV GTO?
I don't expect the prices to change much in the next 5-10 years, but in the longer term I think the HSV GTO will become a much sought after car. Look after it and keep the kays down as much as you can.
Maloo airbags deployed unexpectedly
I have no doubt that it was frightening and I'm equally as sure that the experts you have spoken to are correct, and that the explanation you have been given is pure fantasy. It would have to be a major side impact to trigger the bags and it would seem that just hasn't happened. Something being flicked up from the road is not going to set the bags off. Go back to Holden and demand a proper explanation.
2011 HSV Maloo ute GPS concern
By your description it would seem that you haven't got the latest update, or that Holden is lagging way behind. As you've reached a dead-end with the dealer you should escalate the issue to corporate level and approach Holden directly.
Noisy HSV Maloo
If it's a grinding noise like metal on metal as you first describe I would change the oil in the diff; it it's a clunk as you also say then I would be seeking advice from a diff specialist. There are specialists in all states and most will be familiar with the diff problems in most cars, and will have fixes for them.