keyless entry re-program

Does anyone know how to re-program a keyless entry remote for a 1997 bonneville?

Do you mean "re-program" after insertion of new batteries? If that's the case then you would aim the fob at car and depress the lock & unlock simaltaneiously. This re-initializes the routine for keyless entry.

No, I mean getting a new keyless entry and re-programing it to the receiver of the car.

first make sure you have the correct keyless remote check with your local dealer then if correct do these next 6 steps before starting procedure get a fused jumper wire #1 turn ignition switch off #2 using a fused jumper jump terminal 8 blk/wht to terminal 4 blk on the data link connector close all doors #3 turn ignition switch on door locks cycle #4 press and hold lock and unlock buttons on the remote hold for about 30 seconds or so locks will cycle again #5 to program another remote repeat step four but during this whole process DO NOT TURN KEY SWITCH OFF #6 disconnect your jumper wire from the data link connector now at this point it is okay to turn ignition switch off but not until this point