I got the letter in September. It said wait until October to make an appointment with the dealer. I made the appointment and the service adviser said bring up to two keys. This is for a Chevy Impala. The Service Adviser said about a 30 minute job.
I was expecting a new ignition switch, with tumblers that "learn" the current key's cut/pattern. Or maybe they can pull the cylinder and reuse it in a new switch? But why bring two keys?
When I arrived they said all they needed was my two keys.
The recall stated "unintended key rotation"
My keys had a long slot for a split ring that attached the keyless entry remote. They installed "inserts into the slotted hole to make it a centered round hole and added two more smaller diameter split rings between the key and the original split ring connecting the remote.
The inserts (two per key, one each side) were $0.14 each. The split rings were also $0.14 each. Labor was .4 hour equaling $32.98!
I think I could have pounded the inserts in and installed the split rings in about 2 minutes. Their 1/2 hour estimate turned into an hour.
I did look at new trucks and marveled at the list prices.
They told me the insert kept the "load" centered in the ignition, and was less likely to rotate than with a slot where the split ring slides to the edge of the key hole.
I wonder how much GM spent engineering this "fix"? Probably still cheaper than replacing locks and keys both parts and labor wise.