By the way, not sure when GM went to this but on the PS pumps there is a valve on the back with an electrical plug. Its for a type of speed sensitive steering. It works with a sensor at the bottom of the steering column to supposedly make steering effort easier....it sucks and when it fails the vehicle will usually pull hard when in a turn. Mine on my 99 Tahoe is disconnected and a different valve is in the pump. I've seen these on 97 and up, not sure if it was earlier though. I believe there is a TSB from GM about it.
In other words, I would go get a new pump if you need one. Finding a good used front driveshaft is fine.
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