2002 Chevy Suburban I think Steering is the problem

Having just had the transmission rebuilt 4 months ago, I was hoping for no more costly repairs for a while.

My Suburban has been functioning just fine since the transmission until I tried to get the kids to school this morning.

As I was backing out of the carport, I noticed it felt a bit strange as I was turning the wheel. When I put it in drive and continued to turn in the opposite direction, it was as if the wheels would not fully crank.

Then as I proceeded to continue down the driveway, it still just did not feel right. I first thought I might have a flat tire, by the way it was riding. NO

I drove a little further and decided I did not want to risk being stuck in traffic with 2 kids and a car issue, so I turned around and came back home.

I know it is not the engine. It seem to me that it is a steering problem. With my husband out of the country, I am just not sure where to take it or even what to tell them the problem is.

IDEAS?