I have a 98 GMC Suburban with a perhaps a steering problem.
Normally, when driving on a freeway and turning on a clover leaf or a 90 degree exit ramp, one has to apply a constant force on the steering wheel to keep the vehicle on the road.
What I seem to have detected is that when applying force on the steering wheel on the above, I seem to feel that the wheel is intermittently fighting me with a non-constant force as though it has a mind of its own. I only notice this at speeds above 45 mph. I dont feel this when driving at lower speeds like driving into a driveway or into a parking lot. It almost seems that the power steering pressure varies giving the feeling of a non-constant force on the wheel. This does not cause an out of control condition but would like to know if anyone has experienced this. When driving straight, the steering wheel seems normal.
Any ideas?