2004 GMC Sierra 5.3L 4x4 Steering Stiff Problems

Hello, I have a 2004 GMC Sierra and I have noticed throughout the winter when I ran it in 4WD the steering would get very stiff when trying to turn. Sometimes I could not turn very sharp at all. Does anyone know what the problem could be that is causing this?

Check your power steering fluid. If it's low, top it off and check for leaks in the hoses and the pump. Don't forget to check the lines around the steering rack and gears. I'm not sure exactly how the power steering is set up on your truck, but these systems are usually pretty straigtforward.