P/S - Shudder During Static or Low Speed Turns

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Number: 92-158-3B

Section: 3B

Date: APRIL 1992


Corporate Bulletin No.: 233205

ASE No.: A4


Subject:
POWER STEERING SHUDDER


Model and Year:
1990-92 LUMINA (APV) WITH 3.1L ENGINE


Condition:
Some 1990-1992 U-vans with 3.1L V-6 engine (RPO LG6), may exhibit a slight power steering shudder condition noted during static or low speed turning maneuvers. This condition may be perceived by the vehicle operator as a disturbance felt and heard through the body structure and steering wheel.

Cause:
A combination of power steering pump pressure pulses and engine firing frequency generating a disturbance through the body structure.

Correction:
Replace the existing power steering return hose/pipe assembly (steering gear to cooler pipe) with new assembly indicated below with internal tuning cable.

Parts Required:

Part Description Part Number Quantity

Power Steering Return Hose/ 26030907 1
Pipe Assembly

Removal and installation procedures shown in applicable Service Manual Section 3B (Power Steering Gear and Pump) must be followed to insure proper installation and operation.


Parts Information:

Parts are currently available from GMSPO.

Warranty Information:

Labor Operation Number: E-8625

Use applicable labor time guide for labor hours.