Replaced my 02 silverado cd/radio with a 99 cd/radio - airbag light now on
 

As title says did a radio swap. Took out my non-working factory 02 radio and inserted an almost identical looking radio from a 99 truck. Mounted and plugged in the same.

Radio and cd work fine.

Now my airbag light is on. Poking around the net I see:

1. Disconnect the battery for 3 minutes. All good.
2. Disconnecting the battery for this problem won't work.
3. Turn the ignition switch on and off 3 times then start the truck.
4. #3 is bull and won't work.
5. Take to a dealer and have them use a scanner to re-set the airbag error code. Pay $20 to $80.
6. Take to Autozone and have them re-set with their scanner for free.

Anyone here know the truth? Thanks.

It probably is the body control module not recognizing the radio, is there a fix? Perhaps that would require if possible a program edit/change.

Well, tried the ignition on/off deal and disconnecting the battery. Neither worked.

Guess I'll have to try the scanner deal unless someone knows of another way.