Hummer H1 (2006+). Manual - part 271

9-62 Axles, Suspension and Frame

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NOTE: Position the clamp at a 45 degree angle toward the wheel before securing with the bolt.

5.

Secure the vent line to the bracket with the clamp and bolt.

Figure 9-101:   Vent Line

Figure 9-102:   Geared Hub Vent Line Positioning

STABILIZER BAR

Removal

1.

Remove the two locknuts, three washers and the pin securing the bar link to the stabilizer bar (Figure  9-103).

2.

Remove the two locknuts, washers, clamp and the stabilizer bar from the frame bracket. 

3.

Remove the bushing from the stabilizer bar.

TEE FITTING

VENT LINE

FRAME

CLAMP

BRACKET

VENT

CONTROL ARM

CONTROL

CLAMP

GEARED HUB

BRACKET

VENT

45°

 LINE

 FITTING

VENT LINE

 LINE

ARM

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 Axles, Suspension and Frame  9-63

Installation

1.

Install the bushing on the stabilizer bar (Figure  9-103).

2.

Install the stabilizer bar on the frame bracket with the clamp, two washers and the locknuts. Tighten the locknuts to 60 lb-ft.
(81 N•m).

3.

Install the stabilizer bar on the bar link with the pin, three washers and the two locknuts. Tighten the locknuts to 75 lb-ft. (102
N•m).

Figure 9-103:   Stabilizer Bar Replacement

Stabilizer Bar Link Replacement

Removal

1.

Remove the locknut and two the washers securing the bar link to the stabilizer bar (Figure  9-104).

2.

Remove the bolt, two washers and the bar link from the lower control arm.

Installation

1.

Apply thread-locking compound to the threads of the bolt. Install the bar link to the lower control arm with the two washers 
and the bolt. Tighten the bolt to 70 lb-ft. (95 N•m) (Figure  9-104).

2.

Install the bar link on the stabilizer bar with the two washers and the locknut. Tighten the locknut to 75 lb-ft. (102 N•m).

Figure 9-104:   Stabilizer Bar Link Replacement

BUSHING

FRAME

BAR LINK

PIN

STABILIZER 

BRACKET

BAR

BAR LINK

LOWER 

STABILIZER 

BAR

CONTROL ARM

9-64 Axles, Suspension and Frame

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BALL JOINT

NOTE: The upper and lower ball joints are equipped with a grease purge slot to purge old grease out of the ball joint during ser-
vice. DO NOT replace the ball joint for the boot leaking grease.

Upper Ball Joint Wear Check Procedure

NOTE: If the vehicle was previously lifted off the ground for other service, center the steering wheel, roll the vehicle forward and
back to settle the suspension and relieve the tension on the ball joints before beginning the checking procedure.

1.

With the vehicle on the ground (being careful not to damage the boot), place the tip of a pry bar between the steering knuckle
and the ball joint boot (Figure  9-105).

2.

With the shank of the pry bar contacting the upper control arm as shown, pry upward and note the movement of the ball joint
against a ruler. Be careful to measure only the ball joint movement and not the flex of the control arm resulting from prying
against it. 

3.

Any upper ball joint with more than 1/16” (1.6 mm) movement should be replaced.

Figure 9-105:   Upper Ball Joint Wear Check

Upper Ball Joint Replacement

Removal

1.

Remove the wheel.

2.

Raise and support the lower control arm.

3.

Disconnect the p-clamp securing the vent line and the speed sensor lead to the upper control arm.

4.

Remove the cotter pin and the slotted nut from the upper ball joint (Figure  9-106).

5.

Remove the four locknuts, bolts, eight washers and the upper ball joint from the upper control arm.

6.

Separate the upper ball joint from the geared hub using ball joint remover J–24319-B or equivalent. Remove the ball joint.

Installation

1.

Position the upper ball joint on the upper control arm, ensuring the upper ball joint is placed above the upper control arm (Figure  9-106).

NOTE: Check the upper ball joint torque 15 minutes after initial installation. Adjust if necessary.

2.

Install the upper ball joint on the upper control arm with the four bolts, locknuts and the eight washers. Tighten the fine thread
locknuts to 30 lb-ft. (41 N•m).

NOTE: Do not loosen the slotted nut to install the cotter pin. 

PRY BAR

MEASURE

MOVEMENT

HERE

STEERING

KNUCKLE

7-S09-026.1

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 Axles, Suspension and Frame  9-65

3.

Install the upper ball joint on the geared hub with the slotted nut. Using a crowfoot and adapter, tighten the slotted nut to 65 lb-
ft. (88 N•m). Install cotter pin in slotted nut.

4.

Install the p-clamp securing the vent line and the speed sensor lead to the upper control arm.

5.

Lubricate the upper ball joint until grease is pushed out of the purge slot and wipe off the excess grease.

6.

Install the wheel.

Figure 9-106:   Upper Ball Joint Replacement

Lower Ball Joint Wear Check

1.

Support the lower control arm with a jack or stand to unload the lower ball joint. 

2.

Place a pry bar between the lower arm at the ball joint and the geared hub and measure the vertical play obtained by moving
the pry bar down (Figure  9-107). Maximum play should not exceed 1/8" (3.5 mm). 

3.

Replace the ball joint if the end play exceeds the limit.

Figure 9-107:   Lower Ball Joint Wear Check

UPPER CONTROL ARM

UPPER BALL JOINT

GEARED HUB

MEASURE

MOVEMENT

HERE

PRY BAR