Vauxhall radios unlocked online — from the serial on the label of the unit.
Start with the serial on the unit. That is what we answer: the label on the casing carries it, and it names your exact radio rather than the car around it.
Vauxhall units are Opel units with a different badge, so the same tables answer them. The form still takes a 17-character VIN, but VIN lookups are not something we can answer at the moment — the serial on the unit is.
The certain way — the unit serial. Pull the radio out with a pair of release keys and read the label on the casing: GM1500… on a CDR 500, GM0205… on a CDR 2005, 14 characters in total. On the older Famar-built players — CDP 2500, CDP 2700, DC401 and their kin — the label instead carries a short reference number: the letter A and four digits. Send that whole, letter included.
A serial names your exact unit rather than the car around it, which is why it is the one we work from. If in doubt, pull the serial.
The serial is on the label on the casing:
GM150010000003
Later units carry the same kind of label, starting GM0205:
GM020510000003