Riviera V6-3.8L SC VIN 1 (1995)
Power Steering Line/Hose: All Technical Service Bulletins
Steering - Vibration, Shudder, or Moan Noise
File In Section: 02 - Steering Bulletin
No.: 99-02-32-007A
Date: February, 2001
TECHNICAL
Subject:
Steering Vibration/Shudder/Moan During Parking Maneuvers on Dry Pavement (Install Power Steering Pressure (Inlet) and/or Return (Outlet) Hose
Assembly)
Models:
1995-99 Buick Riviera
1997-2001 Buick Park Avenue, Ultra
2000-2001 Buick LeSabre
2000-2001 Pontiac Bonneville
This bulletin is being revised to add the 2001 model year and to update the parts information. Please discard Corporate Bulletin Number 99-02-32-007
(Section 2 - Steering)
Condition
Some customers may comment on a steering vibration, shudder or moan noise when steering during parking maneuvers on dry pavement.
Correction
Install a new power steering pressure (inlet) hose assembly on the following vehicles:
^
1995-98 Buick Riviera
^
1997-98 Buick Park Avenue and Ultra
Install a new power steering pressure (inlet) and return (outlet) hose assembly on the following vehicles:
^
1999 Buick Riviera
^
1999-2001 Buick Park Avenue and Ultra
^
2000-2001 Buick LeSabre
^
2000-2001 Pontiac Bonneville Diagnosis
Important:
In diagnosing the above listed vehicles, do not overlook other obvious repairs prior to replacing the hose(s).
1.
Verity that the power steering pump reservoir is full.
^
If fluid level is low, till and check for leaks.
^
If power steering system has air in the system, perform the "Bleeding Air from Power Steering System" procedure as described in the Power
Steering System sub-section of the Service Manual.
Important:
When performing the "Bleeding Air from Power Steering System" procedure, it is important that the front of the vehicle is supported by the lower
control arms. If the vehicle is not supported by the lower control arms, the procedure may cause the strut bushing to dislocate and cause new concern.
2.
Verify that the accessory drive belt is in good condition and that the pulleys are not bent or damaged.
3.
Verify proper belt tension and operation of the belt tensioner.
4.
Check for power steering hose ground out conditions.
