K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
Steering Gear Pinion Valve: Technical Service Bulletins
P/S - Reduced Steering Assist When Cold
BULLETIN NUMBER:
92-3B-146A
SECTION:
3B
NUMBER:
1
CORPORATE
REFERENCE NUMBER:
263202R
DATE:
January 1993
SUBJECT:
REDUCED POWER STEERING ASSIST WHEN COLD (REPLACE WITH NEW VALVE ASSEMBLY)
MODELS:
1988-92 C/K TRUCKS
THIS BULLETIN CANCELS AND REPLACES GMC TRUCK SERVICE BULLETIN
92-3B-146, DATED NOVEMBER 1992 TO CHANGE THE PARTS INFORMATION. ALL COPIES OF 92-3B-146 SHOULD BE DESTROYED.
Owners of some 1988-92 C/K trucks equipped with power steering may comment that during a cold start condition there is reduced power steering assist.
This condition is caused by the current fluoroelastomer O-rings not providing enough spring force to engage the teflon valve rings under all dimensional
stack conditions. This condition occurs during vehicle cold starts, after the vehicle has been subjected to high temperature operating conditions.
To correct this condition the steering gear valve assembly should be replaced with a new valve assembly that features new hydrogenated nitrile base
rubber valve body O-rings to eliminate potential for lack of power steering assist during cold starts. The 1993 C/K production steering gears include the
new valve assembly.
SERVICE PROCEDURE
Tools Required :
J7624
Adjustable Spanner Wrench
J4245
Snap Ring Pliers
J8524-1
Adjuster Plug Bearing Installer
J7079-2
Driver
J29810
Seal Protector
J7754-01
0-25 lbs.in. torque wrench