Hummer H1 (2002+). Manual - part 126

 

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 Steering System  8-11

®

05745159

IGNITION SWITCH LOCK CYLINDER 
REPLACEMENT

Removal 

1.

Disconnect battery ground cable.

2.

Remove close-out panel.

3.

Remove five screws and lower steering column shroud
(Figure 8-16).

4.

Disconnect lock cylinder connector from ignition switch
connector.

5.

Turn ignition switch to RUN position.

6.

Depress lock cylinder detent pin through detent pin hole
and remove lock cylinder from steering column. 

Installation 

1.

Insert lock cylinder into steering column (Figure 8-16).

2.

Turn ignition switch to LOCK position.

3.

Connect lock cylinder connector to ignition switch
connector.

4.

Secure lower steering column shroud to steering column
with five screws.

5.

Install close-out panel.

6.

Connect battery ground cable.

7.

Verify that ignition switch lock cylinder operates properly.

Figure 8-16:   Ignition Switch Lock Cylinder 

Replacement

IGNITION INTERLOCK CABLE REPLACEMENT

Removal 

1.

Remove five screws and lower shroud from steering col-
umn  (Figure 8-17).

Figure 8-17:   Steering Column Shrouds

2.

Loosen two locknuts securing steering column to
mounting bracket.

3.

Remove locknut, lockwasher, three washers, and bolt
securing steering column to mounting bracket.

4.

Lower steering column and remove upper shroud.

5.

Remove screw and interlock cable from ignition switch
(Figure 8-18).

6.

Disconnect connector from interlock cable.

7.

Raise and secure hood.

8.

Remove screw securing clamp and interlock cable to
bracket. Remove clamp from interlock cable.

9.

Remove close-out panel (Section 10).

10. Remove shifter (Section 5).

11. Remove nut and screw securing interlock cable to shifter

(Figure 8-19).

12. Remove interlock cable and grommet from vehicle.

STEERING COLUMN

LOCK 

LOCK CYLINDER 

CONNECTOR

CYLINDER

LOCK CYLINDER

DETENT PIN

LOWER STEERING

COLUMN SHROUD

DETENT

PIN HOLE

IGNITION

SWITCH 

CONNECTOR

UPPER SHROUD 

LOWER SHROUD 

STEERING

MOUNTING BRACKET

COLUMN

10 lb-ft 

31 lb-ft (42 N•m)

(14 N•m)

BOLT

4-1-00

8-12

Steering System

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®

Figure 8-18:   Interlock Cable/Ignition Switch

Installation 

1.

Secure interlock cable to shifter with screw and nut. 
Tighten nut to 8 lb-ft (11 N•m) (Figure 8-19).

Figure 8-19:   Interlock Cable and Shifter

2.

Route interlock cable through bracket and install shifter
(Section 5).

3.

Secure interlock cable to bracket with clamp and screw
(Figure 8-18).

4.

Route interlock cable through cowl and secure with
grommet.

5.

Lower and secure hood.

6.

Secure interlock cable to ignition switch with screw.

7.

Connect connector to interlock cable.

8.

Position upper steering column shroud on steering column
(Figure 8-17).

9.

Raise steering column and secure steering column on
mounting bracket with bolt, three washers, lockwasher,
and locknut. Tighten locknut to 31 lb-ft. (42 N•m).

10. Tighten two locknuts securing steering column to

mounting bracket. Tighten locknuts to 10 lb-ft (14 N•m).

11. Secure lower steering column shroud to upper shroud with

five screws.

12. Install close-out panel (Section 10).

Test 

1.

With transmission lever in P, turn ignition key to run.

2.

Activate brake switch and move transmission lever to N.

3.

Without turning ignition key off, move transmission shift
lever to P.

4.

Turn ignition key off. To pass test, it should not be
possible to move transmission lever out of P unless an
extremely high effort is applied.

5.

Turn ignition key on. To pass test, it should not be
possible to move transmission lever out of P unless an
extremely high effort is applied.

6.

Activate brake switch. To pass test, transmission lever
should be moved from P to N with normal shift effort.

7.

Turn ignition key off. To pass test, it should not be
possible to remove ignition key while transmission lever is
in N.

8.

Move transmission lever to P. To pass test, it must be
possible to remove ignition key with normal effort applied
to ignition key.

STEERING GEAR REPLACEMENT

Removal 

NOTE: Ensure front wheels are in the straight-ahead position.
Have drainage container ready to catch fluid.

1.

Disconnect two power steering lines from steering gear  
(Figure 8-20).

Figure 8-20:   Steering Gear Mounting

LOCK AND SWITCH

CONNECTOR

GROMMET

CLAMP

BRACKET

INTERLOCK CABLE

COWL

 HOUSING ASSEMBLY 

IGNITION SWITCH

SHIFTER

INTERLOCK 

CABLE

BRACKET

8 lb-ft (11 N•m)

INTERMEDIATE SHAFT

YOKE

STEERING 

STEERING

POWER STEERING LINES

FRAME

YOKE

NOTCH

SPLINES

GEAR 

 GEAR

 4-1-00

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 Steering System  8-13

®

05745159

2.

Turn steering wheel left and right several times to bleed
off power steering fluid.

3.

Remove bolt on intermediate shaft yoke at steering gear
and disconnect intermediate shaft from steering gear.

4.

Remove nut and lockwasher from steering arm
(Figure 8-21).

5.

Using puller J–42548, remove steering arm from shaft.

6.

Remove three bolts, lockwashers, washers, and steering
gear from frame (Figure 8-20).

Installation 

1.

Align steering gear with mounting holes in frame and 
secure with three washers, lockwashers, and bolts. Tighten 
bolts to 54-66 lb-ft (73-89 N•m)  (Figure 8-20).

2.

Align hole in yoke with notch on steering gear splines and
slide intermediate shaft on steering gear splines.

3.

Insert bolt in yoke and tighten locknut to 60 lb-ft (81
N•m).

4.

Connect two power steering lines to steering gear.

NOTE: Ensure front wheels are in the straight ahead position.

5.

Install steering arm on shaft with lockwasher and nut.
Tighten nut to 185 lb-ft (251 N•m) (Figure 8-21).

6.

Fill power steering reservoir.

7.

Purge air from power steering system (Refer to  “Purging
Air From the Power Steering System” on page 8–22 ).

8.

Inspect wheel alignment.

INTERMEDIATE STEERING SHAFT 
REPLACEMENT

NOTE:  Ensure front wheels are in straight-ahead position
while removing and installing intermediate steering shaft.

Figure 8-21:   Steering Arm Removal

Removal 

1.

Remove close-out panel.

2.

Remove three nuts, six washers, and three screws from
dust boot (Figure 8-22).

3.

Remove bolt on intermediate steering shaft yoke at
steering gear.

NOTE:  Before performing step 4, put scribe marks showing
the position of the yoke relative to the splines.

4.

Remove bolt on intermediate steering shaft yoke at
steering column and remove shaft.

Figure 8-22:   Intermediate Steering Shaft

Removal

Installation 

1.

Align hole in yoke with notch on steering gear splines 
(Figure 8-20). Insert bolt through yoke and tighten locknut 
to 60 lb-ft (81 N•m)  (Figure 8-22).

2.

Align scribe marks and slide yoke onto steering column
splines. Insert bolt through yoke and tighten locknut to 60
lb-ft (81 N•m).

3.

Apply silicone spray or equivalent to end of steering shaft.
Secure dust boot with three screws, six washers and three
nuts.

4.

Lubricate steering shaft at universal joints.

5.

Install close-out panel.

SHAFT

STEERING

ARM

STEERING COLUMN

DUST BOOT

INTERMEDIATE

STEERING SHAFT

STEERING GEAR

4-1-00

8-14

Steering System

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®

INTERMEDIATE STEERING SHAFT DUST BOOT 
REPLACEMENT

Removal 

1.

Remove close-out panel.

2.

Remove three nuts, six washers, and three screws from
dust boot (Figure 8-23).

NOTE:  Before performing step 3, put scribe marks showing
the position of the yoke relative to the splines.

3.

Remove bolt on yoke and pull intermediate steering shaft
from steering column.

4.

Remove four locknuts, eight washers, four screws, spacer,
and dust boot from cowl panel and intermediate steering
shaft.

Installation 

1.

Secure spacer and dust boot to cowl panel with four 
screws, eight washers, and four locknuts. Tighten locknuts 
to 60 lb-ft (81 N•m)  (Figure 8-23).

2.

Insert intermediate steering shaft through dust boot. Align
scribe marks and slide yoke onto steering column splines.
Tighten locknut on yoke to 60 lb-ft (81 N•m).

3.

Apply silicone spray or equivalent to end of steering shaft.
Install three screws, six washers, and three nuts on dust
boot.

4.

Install close-out panel.

Figure 8-23:   Intermediate Steering Shaft Dust Boot

Replacement

STEERING COLUMN

COWL 

DUST 

SPACER

INTERMEDIATE 

STEERING SHAFT

BOOT

PANEL

  4-1-00