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Why is power steering going in and out on 2008 Chevy silverado?

Potential Causes:

- Low Power Steering Fluid: Check the power steering fluid reservoir and top it off if needed.

- Faulty Power Steering Pump: If the power steering pump is failing, it may not be able to generate enough pressure to assist in steering the vehicle. Look for signs like leaking fluid, unusual noise, or lack of responsiveness in steering.

- Malfunctioning Power Steering Pressure Switch: This switch monitors the pressure of the power steering system and sends a signal to the power steering pump to adjust its output. A malfunctioning switch can lead to intermittent problems with power steering.

- Damaged Power Steering Rack or Lines: If the power steering rack or lines are damaged, fluid can leak out of the system, leading to loss of power steering assist. Check for signs of leaks or damage.

- Electrical Issues: Faulty wiring or a problem with the power steering control module can also disrupt the power steering's function, causing it to go in and out.

Recommended Action:

- Diagnose the specific cause by checking the power steering fluid level, inspecting for leaks or damage, and possibly conducting further testing with a mechanic if necessary.

- Address the root cause by refilling the fluid, replacing faulty components if required, or repairing any damage.