Bumping sound under my Tahoe

I have a 2002 Tahoe. Lately there is a bumping sound coming from underneath. I can feel it in the steering wheel and on the pedals when it does it. I notice it when I'm slowing down or am turning after I slowed down. It sounds like it's coming from the front drivers side around the wheel. I only notice it when I'm going less than about 30 mph. It's probably doing it at faster speeds, but I just can't hear it then. Any idea what this could be?

take it to a chevy dealer your intermediate steering shaft needs to be lubed

Thanks, I did that yesterday and that's exactly what it was! It's nice to have that gone.