Lumina V6-191 3.1L (1990)
Power Steering Line/Hose: All Technical Service Bulletins
Power Steering - Shudder Condition
Number:
91-174-3B
Section:
3B
Date:
January 1991
Corp. Bulletin No.: 033207
Subject:
POWER STEERING SHUDDER
Model and Year:
1990-91 LUMINA WITH 3.1L ENGINE
Condition:
Some 1990-91 W-cars with 3.1L (RPO LHO) V-6 engines assembled prior to VIN breakpoints indicated below, may may exhibit a
slight power steering shudder condition noted during static or low speed turning maneuvers. This condition may be perceived as a
disturbance felt and heard by the vehicle operator through the body structure and steering wheel.
VIN Breakpoints
Chevrolet
Oshawa # 1
M9143557
Oshawa # 2
M1116359
Cause:
A combination of power steering pump pressure pulses and engine firing frequency generating a disturbance transmitted through the
body structure.
Correction:
Replace the existing power steering inlet (pressure) hose and pipe assembly with new assembly noted below by model year, with internal
tuning cable and high expansion hose material.
1990
1991
P/N 26025653
P/N 26026921
Parts are currently available from GMSPO.
Labor Operation Number:
E8622
Use applicable Labor Time Guide for labor hours.
