Power steering not working

Are you referring to engine oil? Those are not related. I suspect your truck uses the hydro-boost power brake system. That runs on pressurized power steering fluid. The best suspect is a worn power steering pump. If you are asking if this can be caused by low power steering fluid, that is an integral part of the system, so of course it cannot work if the level is low enough that air is being sucked in.

The power steering is in between the marks on the dip stick. The truck is 1994 Chevrolet Silverado 3500 it is a turbo diesel. I am not sure where the power steering pump is to check if it is bad.

Hello,

It sounds like the pump is bad here is a guide that will help you change it out.

https://www.2carpros.com/articles/how-to-replace-a-power-steering-pump

Please let us know what happens.

Cheers, Ken

Steering problem
1991 Chevy Truck 200000 miles

My power steering wont work when I turn except if I rev the motor while turning if I dont their is no powersteering at all do I need a new pump

Have you checked your power steering fluid level?

The clue to a weak power steering pump is the power assist comes back when raising engine speed.