Replacing a steering column ignition switch on a 2002 Pontiac Grand Prix is not considered a major repair. The task is considered easy but if done wrong could be dangerous. It is best to refer to vehicle manual for the car to ensure proper direction is given.
The steering column is connect with a shaft that runs from rack and pinion to steering column. A short shaft sticks out of rack and pinion and is attached to shaft with 1 bolt that goes thru the coupler. Usally hid under a boot that goes around the shaft.