Whistle Noise from Front of Vehicle (Install Power Steering Hose Adapter)

Some customers may comment on a whistle noise from the front of the vehicle, but noise will quit when turning the steering wheel.

Interaction with the fluid flow through the pressure port and the poppet valve at the power steering (PS) gear box may cause this condition.

Install an adapter and O-ring to the PS gear box high pressure inlet using the following procedure.

1. Remove the return line from the PS gear box in order to gain access to the high pressure line.
2. Remove the high pressure line from the PS gear box.



3. Install the adapter and O-ring to the PS gear box high pressure inlet .

Tighten
Tighten to 27.5 N·m (21 lb ft).

4. Install the high pressure line and O-ring to the adapter.

Tighten
Tighten to 27.5 N·m (21 lb ft).

5. Install the return line and O-ring to the PS gear box.

Tighten
Tighten to 27.5 N·m (21 lb ft).

6. Bleed the PS system. Refer to SI document ID #487449.
7. Clean the area with brake cleaner.
8. Inspect for leaks.

Parts are currently available from GMSPO.

For vehicles repaired under warranty, use: