Chevrolet radios unlocked online — from the car's VIN, with nothing to remove.
The quick way — the VIN. No tools, nothing to remove: the VIN is on the plate at the base of the windscreen, on the driver-side door pillar, and on your V5C or registration document.
Chevrolet cover here is the GM South America range — Brazil (93C), Argentina (8AG) — built roughly 1994–2009. Outside that range and those markets the VIN will not be in our database, and we say so rather than guess.
The VIN is what we answer here. It names the car, and our table maps it to the code the radio left the factory with — so there is nothing to remove and no label to find.
One limit worth knowing: the answer is right while the radio is the original one. A unit swapped at some point in the car's life came from another car and carries another code, and we would have no way of telling.
17 characters, no I, O or Q. Windscreen base, door pillar or logbook.
93CSH08N01C128407
The same VIN is printed on the car's paperwork — no tools at all.
8AG116AJ05R200007