If it has the original Eurovox stereo, any Holden dealer can get that info for you if you give them your VIN. Note that if you got the radio out of another VT you need the VIN of the car the radio came from. Failing this you need to get the radio out of the car and give a dealer the VIN and serial number of the radio. Then they can get the pin for you, but it is not cheap.
you need to take it to Holden to get the code ,theres no other way i am aware of, as all the codes differ , cost is about 50-60 bucks
Holden VT Commodore was created in 1997.
turn signal located on VT commodore
how much to get brake pads and rotors replaced on a holden vt commodore
1.5mm
Passenger side kick panel
Replacing a head gasket on a VT Commodore instructions can be found in a manual. Manuals can be bought at most auto parts retailers or in book stores.
The flasher unit relay location on a 1997 VT Commodore is under the steering column. The door has to be opened to reach the relay.
Commodore front and rear doors fit 6" speakers
To fix the door handle of a VT Commodore, remove the hardware from the door and loosen the knob. Remove the turn post and tighten all mechanical parts.
I found this whilst looking for an answer myself ;-) (don't know if this site allows links so just ad http before the : ) ://forums.justcommodores.com.au/vt-vx-holden-commodore-1997-2002/83178-where-vt-sump-plug.html
Tutorial here http://forums.justcommodores.com.au/holden-commodore-how-s/3935-installing-stereo-into-vn-vs.html