Radio code for vauxhall vectra

[redcrx]

Can anyone help? My boyfriend inherited a car when his dad passed away but we cannot find the code for the radio.
The radio is a GM Philips Car 400
serial GM0400W1903754

Is there anyway of getting the code without having to pay vauxhall

[ENGINEER1973]

Go to a vauxhall dealer and they can tell it usually off the chassis number - should all be on computer.