99 Burb should be the same as the 95-98 pickup. It's still a 400 series. I'm on my second one, and both of them have had column work done. The plastic the housings are made from is probably ABS, I know it isn't polystyrene. As far as I know, they're all that brownish black color. All of them I've seen are. I agree about the posts breaking, they're not made very stout. The one on my Burb has a couple of cracks in it, I used super glue gel on it and put aluminum duct tape like HVAC service people use on the back side ( inside) of the housing halves when we had them off to work on the ignition switch and lock cylinder.