Steering Moan/Shudder/Vibration/Noise During Parking Manuevers (Replace Power Steering (Inlet) Hose Assembly)

This bulletin is being revised to add an additional model and provide new part and installation information. Please discard Corporate Bulletin Number 02-02-32-003A (Section 02-Steering).

Some customers may comment on a steering vibration, shudder or moan noise during low speed turning/parking maneuvers.

This condition may be due to the steering system frequencies being transmitted through the power steering pressure (inlet) hose assembly.

An improved power steering pressure (inlet) hose assembly is now available from GMSPO. Replace the existing steering pressure hose with a new steering pressure (inlet) hose assembly, P/N 25755411. Refer to the following power steering hose replacement procedure.

1. Open hood and install fender covers.



2. Disconnect the power steering pressure (inlet) hose (1) from the power steering pump (2).
3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in the General Information sub-section of the Service Manual.



4. Remove the bolt (3) that retains the pressure hose retaining clip to the engine block.
5. On 1997-1999 DeVille and Eldorado models, disconnect the pressure switch (4) electrical connector.
6. Remove the exhaust shield retaining bolts.
7. Remove the exhaust shield from the vehicle.
8. Remove the pressure hose plastic retaining strap (5).
9. Disconnect the power steering pressure hose (6) from the steering gear.
10. Remove the power steering pressure hose from the vehicle.



11. Remove the power steering pressure switch (7) from the hose assembly.

1. On 1997-1999 DeVille and Eldorado models, install the power steering pressure switch (7) to the new power steering hose assembly, P/N 25755411.

Tighten
Tighten the pressure switch to 10 N·m (88 lb in).




2. On 2000-2002 Eldorado models, install the plug and O-ring assembly (8), P/N 26021965, to the pressure switch adapter on the new power steering hose assembly, P/N 25755411.

Tighten
Tighten the plug to 11 N·m (97 lb in).




3. Position the new power steering hose assembly into the vehicle.
4. Connect the power steering pressure hose (9) to the steering gear.

Tighten
Tighten the pressure inlet hose at the gear to 27 N·m (20 lb ft).

5. Install the pressure hose plastic retaining strap (10).
6. Install the exhaust shield to the vehicle.
7. Install the exhaust shield retaining bolts.
8. On 1997-1999 DeVille and Eldorado models, connect the pressure switch (11) electrical connector.
9. Install the double end stud (12), P/N 11518592, to the engine block.

Tighten
Tighten the stud at the engine block to 50 N·m (37 lb ft).

10. Place the pressure hose retaining clamp ends over the small end of the stud (12).
11. Install retaining nut, P/N 11517293, to the stud and tighten.
12. Lower the vehicle.



13. Connect the power steering pressure (inlet) hose (13) to the power steering pump (14).

Tighten
Tighten the pressure inlet hose at the pump to 27 N·m (20 lb ft).

14. Fill the power steering system.
15. Bleed the power steering system. Refer to Bleeding Power Steering System in the Power Steering System sub-section of the Service Manual.

Parts are currently available from GMSPO.

For vehicles repaired under warranty, use: