Replacing may cost less then recode plus have a new lock.
Replace it needs tools to do that.... Steering wheel puller and lock plate tool.
people in US often get those thru "Free" loaner tools programs at many auto part stores. But you may have to buy them thru amazon etc.
Note: Some parts in/on the column are NOT Metric like OE S-wheels puller holes need SAE bolts w/ puller tool. Think S-wheel nut is SAE too but Metric wrench can work if not too tight.
"Recode" needs Real Locksmith to visit the car w/ tools to read the lock and have key blanks for Old GM cars.
Can cost in US but in NL can be hard to find someone to do that making cost more.
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
The Ogre's Fiero Cave