If it's like an A body.....and I'm pretty sure it is.....it has a rubber insulator that fits around the bearing. That rubber insulator probably has a staple in it. That staple, believe it or not is what grounds the steering shaft to the column. You can find them new. Most times the staple is included, but sometimes not. Unless they changed how the shaft grounds, it'll be like that. Once you get the wheel off and the turn signal switch out, there is a snap ring on the shaft. Remove that and the three? screws that hold the upper housing on and the housing "should" slide off with the bearing.....most times the bearing is stuck on the shaft. If that's the case, you'll need to disconnect the shaft from the gear box. I think trucks use a rag joint like GM? At any rate, move the shaft out of the way of the gear box and go in and screw the steering wheel nut down till it's flush with the end of the threads on the shaft. Now take a brass hammer.....even a good heavy rubber hammer will probably work and smack the shaft a time or three on the end and it will pop the bearing right off. Then you can take the bearing out. That's how A bodies are and I don't think the design changed much.