Rattle/Knock Noise When Turning While Driving Slowly Over Rough Roads (Install Fluid Restrictor In the Power Steering (P/S) Return Line)

Some customers may comment on a rattle/knocking noise when turning the steering wheel while driving slowly over bumps. This noise is most easily replicated on a bumpy, hard-packed gravel surface while turning.

This condition may be caused by hydraulic noise within the steering rack.

Follow the service procedure below to install a fluid restrictor, P/N 22592200, in the P/S return line to correct this condition.

1. Loosen the two air cleaner intake tube clamps and remove the air cleaner intake tube.
2. Place a suitable drain pan under the power steering pump assembly.



3. Remove the clamp (5) and the power steering return hose (2) from the power steering pump (1).
4. Install the P/S fluid restrictor, P/N 22592200, in the P/S fluid reservoir return port.

Notice: The inlet and outlet hoses must not be twisted during installation. Do not bend or distort the inlet or outlet hoses to make installation easier. Failure to follow these procedures could result in component damage.

5. Install the power steering return hose (2) and the clamp (5) to the power steering pump (1).
6. Install the air cleaner intake tube and tighten the clamps.

Tighten
Tighten the clamps to 5 N·m(44 lb in).

7. Fill and bleed the power steering system. Refer to Bleeding the Power Steering System, SI Document ID #487449.

Parts are currently available from GMSPO.

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