You can start by removing the key from the keychain and use the key without a lot of weight hanging off of it. Or, the key resistor may be dirty or worn. If so, you can solve the problem by cleaning the resistor contacts or, at worst, with a new key.
Sometimes this problem is caused by the contacts for the resistor wearing out within the steering wheel mechanism. That's a significant repair problem. I would try a new key first.
There is a link to a spreadsheet with OBD codes and lots of other information about the 1997 model year Cadillacs.