Hummer H2. Manual — part 34

Excessive pressure in hoses

Restricted hoses, see POWER STEERING

GEAR article

Scored pressure plates

See POWER STEERING GEAR article

Scored thrust plates or rotor

See POWER STEERING GEAR article

Extreme wear of cam ring

See POWER STEERING GEAR article

Rattle in Steering Pump

Vanes not installed

See POWER STEERING PUMP article

Vanes sticking in rotor

See POWER STEERING PUMP article

Swish noise in Pump

Defective flow control valve

See POWER STEERING PUMP article

Groan in Steering Pump

Air in fluid

See POWER STEERING PUMP article

Poor pressure hose connection

Tighten and check, replace if necessary

Squawk When Turning

Damper "O" ring on valve spool cut

See POWER STEERING PUMP article

Moan or Whine in Pump

Pump shaft bearing scored

Replace bearing and fluid

Air in fluid or fluid level low

See POWER STEERING PUMP article

Hose or column grounded

Check and replace if necessary

Cover "O" ring missing or damaged

See POWER STEERING PUMP article

Valve cover baffle missing or damaged

See POWER STEERING PUMP article

Interference of components in pump

See POWER STEERING PUMP article

Loose or poor bracket alignment

Correct or replace if necessary

Hissing When Parking

Internal leakage in steering gear

Check valved assembly first

Chirp in Steering Pump

Loose or worn power steering belt

Adjust or replace if necessary

Buzzing When Not Steering

Noisy pump

See POWER STEERING PUMP article

Free play in steering shaft bearing

See STEERING COLUMN article

Bearing loose on shaft serrations

See STEERING COLUMN article

Clicking Noise in Pump

Pump slippers too long

See POWER STEERING PUMP article

Broken slipper springs

See POWER STEERING PUMP article

Excessive wear or nicked rotors

See POWER STEERING PUMP article

Damaged cam contour

See POWER STEERING PUMP article

Poor Return of Wheel

Wheel rubbing against turn signal

See STEERING COLUMN SWITCHES

article

1998 Chevrolet Pickup C1500

GENERAL INFORMATION Trouble Shooting - Basic Procedures

Flange rubbing steering gear adjuster

See STEERING COLUMN article

Tight or frozen steering shaft bearing

See STEERING COLUMN article

Steering gear out of adjustment

See POWER STEERING GEAR article

Sticking or plugged spool valve

See POWER STEERING PUMP article

Improper front end alignment

See WHEEL ALIGNMENT article

Wheel bearings worn or loose

See FRONT SUSPENSION article

Ties rods or ball joints binding

Check and replace if necessary

Intermediate shaft joints binding

See STEERING COLUMN article

Kinked pressure hoses

Correct or replace if necessary

Loose housing head spanner nut

See POWER STEERING GEAR article

Damaged valve lever

See POWER STEERING GEAR article

Sector shaft adjusted too tight

See ADJUSTMENTS in POWER

STEERING GEAR article

Worm thrust bearing adjusted too tight

See ADJUSTMENTS in POWER

STEERING GEAR article

Reaction ring sticking in cylinder

See POWER STEERING GEAR article

Reaction ring sticking in housing head

See POWER STEERING GEAR article

Steering pump internal leakage

See POWER STEERING PUMP article

Steering gear-to-column misalignment

See STEERING COLUMN article

Lack of lubrication in linkage

Service front suspension

Lack of lubrication in ball joints

Service front suspension

Increased Effort When Turning Wheel Fast Foaming, Milky Power Steering Fluid, Low
Fluid Level or Low Pressure

High internal pump leakage

See POWER STEERING PUMP article

Power steering pump belt slipping

Adjust or replace if necessary

Low fluid level

Check and fill to proper level

Engine idle speed to low

Adjust to correct setting

Air in pump fluid system

See POWER STEERING PUMP article

Pump output low

See POWER STEERING PUMP article

Steering gear malfunctioning

See POWER STEERING GEAR article

Wheel Surges or Jerks

Low fluid level

Check and fill to proper level

Loose fan belt

Adjust or replace if necessary

Insufficient pump pressure

See POWER STEERING PUMP article

Sticky flow control valve

See POWER STEERING PUMP article

Linkage hitting oil pan at full turn

Replace bent components

Kick Back or Free Play

Air in pump fluid system

See POWER STEERING PUMP article

Worn poppet valve in steering gear

See POWER STEERING PUMP article

1998 Chevrolet Pickup C1500

GENERAL INFORMATION Trouble Shooting - Basic Procedures

Excessive over center lash

See POWER STEERING GEAR article

Thrust bearing out of adjustment

See POWER STEERING GEAR article

Free play in pot coupling

See POWER STEERING PUMP article

Steering gear coupling loose on shaft

See POWER STEERING PUMP article

Steering disc mounting bolts loose

Tighten or replace if necessary

Coupling loose on worm shaft

Tighten or replace if necessary

Improper sector shaft adjustment

See POWER STEERING GEAR article

Excessive worm piston side play

See POWER STEERING GEAR article

Damaged valve lever

See POWER STEERING GEAR article

Universal joint loose

Tighten or replace if necessary

Defective rotary valve

See POWER STEERING GEAR article

No Power When Parking

Sticking flow control valve

See POWER STEERING PUMP article

Insufficient pump pressure output

See POWER STEERING PUMP article

Excessive internal pump leakage

See POWER STEERING PUMP article

Excessive internal gear leakage

See POWER STEERING PUMP article

Flange rubs against gear adjust plug

See STEERING COLUMN article

Loose pump belt

Adjust or replace if necessary

Low fluid level

Check and add proper amount of fluid

Engine idle too low

Adjust to correct setting

Steering gear-to-column misaligned

See STEERING COLUMN article

No Power, Left Turn

Left turn reaction seal "O" ring worn

See POWER STEERING GEAR article

Left turn reaction seal damaged/missing

See POWER STEERING GEAR article

Cylinder head "O" ring damaged

See POWER STEERING PUMP article

No Power, Right Turns

Column pot coupling bottomed

See STEERING COLUMN article

Right turn reaction seal "O" ring worn

See POWER STEERING GEAR article

Right turn reaction seal damaged

See POWER STEERING GEAR article

Internal leakage through piston end
plug

See POWER STEERING GEAR article

Internal leakage through side plugs

See POWER STEERING GEAR article

Lack of Effort in Turning

Left and/or right reaction seal sticking
in cylinder head

Replace, see POWER STEERING GEAR

article

Wanders to One Side

Front end alignment incorrect

See WHEEL ALIGNMENT article

Unbalanced steering gear valve

See POWER STEERING GEAR article

Low Pressure Due to Steering Pump

1998 Chevrolet Pickup C1500

GENERAL INFORMATION Trouble Shooting - Basic Procedures

STEERING COLUMN TROUBLE SHOOTING

BASIC STEERING COLUMN TROUBLE SHOOTING CHART

Flow control valve stuck or inoperative

See POWER STEERING PUMP article

Pressure plate not flat against cam ring

See POWER STEERING PUMP article

Extreme wear of cam ring

Replace and check adjustments

Scored plate, thrust plate or rotor

See POWER STEERING PUMP article

Vanes not installed properly

See POWER STEERING PUMP article

Vanes sticking in rotor slots

See POWER STEERING PUMP article

Cracked/broken thrust or pressure plate

See POWER STEERING PUMP article

NOTE:

This is GENERAL information. This article is not intended to be specific to any
unique situation or individual vehicle configuration. The purpose of this Trouble
Shooting information is to provide a list of common causes to problem
symptoms. For model-specific Trouble Shooting, refer to SUBJECT,
DIAGNOSTIC, or TESTING articles available in the section(s) you are accessing.

CONDITION & POSSIBLE CAUSE

CORRECTION

Noise in Steering

Coupling pulled apart

See STEERING COLUMNS article

Column not correctly aligned

See STEERING COLUMNS article

Broken lower joint

Replace joint

Horn contact ring not

See STEERING COLUMN article

Bearing not lubricated

See STEERING COLUMN article

Shaft snap ring not properly seated

Reseat or replace snap ring

Plastic spherical joint not lubricated

See STEERING COLUMN article

Shroud or housing loose

Tighten holding screws

Lock plate retaining ring not seated

See STEERING COLUMN article

Loose sight shield

Tighten holding screws

High Steering Shaft Effort

Column assembly misaligned

See STEERING COLUMN article

Improperly installed dust shield

Adjust or replace

Tight steering universal joint

See STEERING COLUMN article

High Shift Effort

Column is out of alignment

See STEERING COLUMN article

Improperly installed dust shield

Adjust or replace

Seals or bearings not lubricated

See STEERING COLUMNS article

Mounting bracket screws too long

Replace with new shorter screws

Burrs on shift tube

Remove burrs or replace tube

Lower bowl bearing assembled wrong

See STEERING COLUMN article

1998 Chevrolet Pickup C1500

GENERAL INFORMATION Trouble Shooting - Basic Procedures