@Georges dagher keep in mind that the D.I.C. message "service power steering lock" is a different to that of "
service power steering drive with care".
The first issue is retaled to a mechanical lock pin unable to be electrically retracted from the steering shaft and making it impossible to turn the steering wheel where as the later is an intermittant electical connection issue causing the electrical power stering assistance to not work making it rather difficult to steer. Both can be dangerous in their own way and in some cases very very dangerous so take do care and prioritise to get it resolved.
One member had the steering lock issue
here and i explained the background
here. Within the 16 pages ot the linked thread, many have had steering assistance failure and had it fixed, sometimes with some dramas.
So if your steering locks while driving, it is very very dangerous situation and in some ways much worse than power steer assistance failure. I'd be furious with the dealer and Holden if they simply try to fob me off and/or charge me to fix this fault.
Keep in mind that a manufacturers warranty of fixed duration is just one remedy available to you but it does expire after a while.
In Australia, the Australian Consumer Law, ACL, provides a "statuatory warranty" for all products sold in this country. This warranty can not be excluded by the selling business and more importantly does not have a defined period specified within the law.
What this means is that the dealer/manufacturer can't simplty state that the vehicle is outside its warranty period as your statuatory warranty provided in law does not specify a period, period.. The statuatory warrany period is dependant on the product type, price paid in comparison to similar products and public perseption in some sence. It is yet to be cleary defined via case law.
So, though your manufacturers warranty may have expired, your statuatory warranty is almost certainly still in force. That is because one does not expect the steering system to fail in a reletively young car, heck i'd expect it should not fail in a 10 year old car unless it has never seen the inside of a service workshop.
Buying private may possibly make it a little more complicated accessing your statuatory waranty so it could be worth ringing your state consumer group for advice. However i'd expect you should still be covered and the sellling dealer can back bill Holden for resolving your statuatory warranty claims.
Don't let the dealer/Holden banboozle you with their bullsh!t "diagnostic fee" and "guesture of goodwill" phrases and the like. You have a legal expectation that the product is fit for use and of acceptable quality. You shouldn't have to pay to excersise your statuatory warranty.
So get back to HCC and demand your statuatory rights and remind them that a steering failure should be considered a major fault under ACL in which case you're within your rights to chhose the remedy including a full purchase price refund. Maybe then the'd get off their arse and solve your serious issue pronto (and give you a loan car for your troubles wile they do it).