Hummer H1 (2006+). Manual - part 277

9-86 Axles, Suspension and Frame

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Figure 9-131:   Front Bumper and Towing Bracket Replacement for Vehicles With Winch

Front Bumper Mounting Bracket Replacement

Removal

NOTE: Mark the location of the bolts for installation.

1.

Remove the front bumper and the towing brackets (Refer to section 9).

2.

Remove the three locknuts, washers, bolts and the washers securing the mounting bracket to the frame rail (Figure  9-132). 

Installation

1.

Install the mounting bracket on the frame rail with the three washers, bolts, washers and the locknuts. Do not tighten the lock-
nuts.

2.

Install the mounting bracket and the towing bracket on the front bumper with the eight washers, bolts, washers and the
locknuts.

3.

Tighten the front bumper locknuts to 90 lb-ft. (122 N•m) and the frame rail locknuts to 178 lb-ft. (241 N•m).

Figure 9-132:   Front Bumper Mounting Bracket Replacement

FRAME EXTENSION

TOWING BRACKET

FRONT

BUMPER

TOWING BRACKET

FRONT

FRAME RAIL

MOUNTING

BUMPER

BRACKET

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 Axles, Suspension and Frame  9-87

Radiator Front Mount Bracket Replacement

Removal

1.

Remove the locknut, washer, bolt, washer and the spacer securing the radiator to the front mount bracket (Figure  9-133).

2.

Remove the two locknuts, washers, bolts, washers and the front mount bracket from the suspension crossmember. 

3.

Remove the mount from the front mount bracket.

Installation

1.

Install the mount in the front mount bracket (Figure  9-133).

2.

Install the front mount bracket on the suspension crossmember with the two washers, bolts, washers and the locknuts. Tighten
the locknuts to 90 lb-ft. (122 N•m).

3.

Install the radiator on the front mount bracket with the spacer, washer, bolt, washer and the locknut. Tighten the locknut to 30
lb-ft. (41 N•m).

Figure 9-133:   Radiator Front Mount Bracket Replacement

Frame Extension Replacement

Removal

1.

Remove the front bumper.

2.

Remove the hood and the hinge (Refer to section 10).

3.

Remove the two locknuts, washers, bolts and the washers securing the front suspension brace to the frame extension (Figure
 9-134).

NOTE: Note the position of the winch cable bracket for installation.

4.

Remove the three locknuts, washers, bolts and the washers securing the clamp mounting bracket, frame extension and the
bumper mounting bracket to the frame.

Installation

1.

Install the bumper mounting bracket, frame extension and the clamp mounting bracket on the frame with the three washers, 
bolts, washers and the locknuts. Do not tighten the locknuts (Figure  9-134).

2.

Secure the front suspension brace to the frame extension with the two washers, bolts, washers and the locknuts.

RADIATOR

MOUNT

FRONT 

SUSPENSION

SPACER

CROSSMEMBER

MOUNT

BRACKET

9-88 Axles, Suspension and Frame

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3.

Tighten all the locknuts to 178 lb-ft. (241 N•m).

4.

Install the hinge and the hood.

5.

Install the front bumper.

Figure 9-134:   Frame Extension Replacement

Left Airlift Bracket and Front Upper Control Arm Brackets Replacement

Removal

1.

Remove the left engine splash shield (Refer to section 10).

2.

Raise and support the front of the vehicle.

3.

Remove the three screws and the clamps securing the harness to the airlift bracket (Figure  9-135).

4.

Remove the two locknuts, washers and the bolts securing the radiator support to the airlift bracket. 

WARNING:  To avoid personal injury or equipment damage, support the lower control arm during removal and in-
stallation.

5.

Remove the two locknuts, washers, bolts, washers and the upper control arm from the two control arm brackets. 

NOTE: Note the direction of the bolts for installation.

6.

Remove the eight locknuts, washers, bolts, washers, two control arm brackets and the shim(s) from the airlift bracket. 

7.

Remove the two bolts, washers and the airlift bracket from the frame rail.

Installation

1.

Install the airlift bracket, shim(s) and the two control arm brackets on the frame rail with the eight washers, bolts, washers and 
the locknuts. Tighten the locknuts to 90 lb-ft. (122 N•m) (Figure  9-135).

2.

Apply thread-locking compound to the two bolt holes and secure the airlift bracket and the control arm brackets to the frame
rail with the two washers and the bolts. Tighten the bolts to 90 lb-ft. (122 N•m).

3.

Install the upper control arm on the control arm brackets with the cam washers, bolts, washers and the locknuts. Tighten the
locknuts to 260 lb-ft. (353 N•m).

4.

Secure the radiator support to the airlift bracket with the two bolts, washers and the locknuts. Tighten the locknuts to 37 lb-ft.
(50 N•m).

5.

Secure the harness to the airlift bracket with the three clamps and the screws.

6.

Lower the front of the vehicle.

7.

Install the left engine splash shield.

FRAME

BUMPER

MOUNTING

BRACKET

FRAME

BRACKET

CLAMP MOUNTING

EXTENSION

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 Axles, Suspension and Frame  9-89

Figure 9-135:   Left Airlift Bracket and Front Upper Control Arm Bracket Replacement

Right Airlift Bracket and Front Upper Control Arm Brackets Replacement

Removal

1.

Remove the battery tray (Refer to section 12).

2.

Raise and support the front of the vehicle.

3.

Remove the two locknuts, washers and the bolts securing the radiator support to the airlift bracket (Figure  9-136).

WARNING:  To avoid personal injury or equipment damage, support the lower control arm during removal and in-
stallation

4.

Remove the two locknuts, washers, bolts, washers and the upper control arm from the two control arm brackets. 

NOTE: Note the direction of the bolts for installation.

5.

Remove the ten locknuts, washers, bolts and the washers securing the control arm brackets, cooler line bracket and the airlift
bracket to the frame rail.

6.

Remove the two control arm brackets, shim(s) and the airlift bracket from the frame rail.

Installation

1.

Install the airlift bracket, shim(s), two control arm brackets and the cooler line bracket on the frame rail with the ten washers,
bolts, washers and the locknuts. Tighten the locknuts to 90 lb-ft. (122 N•m) (Figure  9-136).

2.

Secure the upper control arm to the two control arm brackets with the cam washers, bolts, washers and the locknuts. Tighten
the locknuts to 260 lb-ft. (353 N•m).

3.

Install the radiator support on the airlift bracket with the two bolts, washers and the locknuts. Tighten the locknuts to 37  lb-ft.
(50 N•m).

RADIATOR

SUPPORT

AIRLIFT BRACKET

HARNESS

UPPER CONTROL ARM

FRAME RAIL

CONTROL ARM

BRACKET

SHIM(S)