Hummer H1 (2002+). Manual - part 147

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 Axles, Suspension, and Frame  9-49

®

05745159

RIGHT AIRLIFT BRACKET AND FRONT UPPER 
CONTROL ARM BRACKETS REPLACEMENT

Removal 

1.

Remove battery tray (Section 12).

2.

Raise and support front of vehicle.

3.

Remove two locknuts, washers, and bolts securing
radiator support to airlift bracket (Figure 9-122).

WARNING:  To avoid personal injury or equipment
damage, support lower control arm during removal and
installation

4.

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

NOTE: 

Note direction of bolts for installation.

5.

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

6.

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

Installation 

1.

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

2.

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

3.

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

4.

Lower front of vehicle.

5.

Install battery tray.

Figure 9-122:   Right Airlift Bracket and Front Upper Control Arm Bracket Replacement

CONTROL ARM 

UPPER

AIRLIFT BRACKET

FRAME RAIL

RADIATOR SUPPORT

COOLER LINE

BRACKET

BRACKET

CONTROL ARM

SHIM(S)

9-50

Axles, Suspension, and Frame

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®

FRONT SUSPENSION BRACE REPLACEMENT 
(VEHICLES WITHOUT WINCH)

Removal 

WARNING:  To avoid personal injury or equipment
damage, support lower control arm during removal and
installation.

1.

Remove locknut, washer, bolt, and washer securing brace 
to frame rail (Figure 9-123).

2.

Remove locknut, washer, bolt, washer, and brace from
crossmember and lower control arm. 

Installation 

1.

Install brace on crossmember and lower control arm with 
washer, bolt, washer, and locknut. Do not tighten locknuts 
(Figure 9-123).

2.

Install brace on frame rail with washer, bolt, washer, and
locknut.

3.

Tighten crossmember locknut to 261 lb-ft (354 N•m) and
frame rail locknut to 178 lb-ft (241 N•m).

Figure 9-123:   Front Suspension Brace 

Replacement for Vehicles Without Winch

FRONT SUSPENSION BRACE REPLACEMENT 
(VEHICLES WITH WINCH)

Removal 

WARNING:  To avoid personal injury or equipment
damage, support lower control arm during removal and
installation.

NOTE: 

The left and right front suspension braces are replaced

basically the same. This procedure covers the left front suspen-
sion brace.

1.

Remove two locknuts, washers, bolts, and washers securing 
front suspension brace to frame extension (Figure 9-124).

2.

Remove locknut, washer, bolt, washer, and brace from
crossmember and lower control arm. 

Installation 

1.

Install brace on crossmember and lower control arm with 
washer, bolt, washer, and locknut. Do not tighten locknut 
(Figure 9-124).

2.

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

3.

Tighten crossmember locknut to 261 lb-ft (354 N•m) and
frame extension locknuts to 178 lb-ft (241 N•m).

Figure 9-124:   Front Suspension Brace 

Replacement for Vehicles With Winch

FRAME RAIL

CROSSMEMBER

BRACE

LOWER 

CONTROL 

ARM

CROSSMEMBER

LOWER 

FRAME

EXTENSION

BRACE

CONTROL ARM

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 Axles, Suspension, and Frame  9-51

®

05745159

SPLASH SHIELD SUPPORT BRACKET 
REPLACEMENT

Removal 

1.

Remove locknut, washer, bolt, and washer securing splash 
shield to bracket (Figure 9-125).

NOTE: 

 Note direction of bolts for installation.

2.

Remove two locknuts, washers, bolts, washers, and
bracket from frame rail. 

Installation 

1.

Install bracket on frame rail with two washers, bolts, 
washers, and locknuts. Tighten locknuts to 90 lb-ft 
(122 N•m) (Figure 9-125).

2.

Install splash shield on bracket with washer, bolt, washer,
and locknut. Tighten bolt to 15 lb-ft (20 N•m).

Figure 9-125:   Splash Shield Support Bracket 

Replacement

SPLASH SHIELD

 

FRAME RAIL

BRACKET

9-52

Axles, Suspension, and Frame

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®

REAR BUMPER REPLACEMENT

Removal 

1.

Remove swing-away spare tire carrier, if equipped (Sec-
tion 6).

2.

Remove rear license plate bracket (Section 10).

3.

Remove trailer hitch, if equipped (Section 13).

4.

Remove two locknuts, washers, bolts, and washers
securing trailer harness to rear bumper (Figure 9-126).

5.

Disconnect trailer harness from body harness, and pull
trailer harness through hole in rear bumper.

6.

Remove four locknuts, washers, bolts, and washers
securing two tiedown brackets to rear bumper, two
mounting brackets, and outer mounting brackets. 

7.

Remove eight bolts, washers, and rear bumper from two
mounting brackets.

Installation 

1.

Install rear bumper on two mounting brackets and secure 
with eight washers and bolts. Do not tighten bolts 
(Figure 9-126).

2.

Install two tiedown brackets on rear bumper, two
mounting brackets, and outer mounting brackets, with four
washers, bolts, washers, and locknuts. Do not tighten
locknuts.

3.

Tighten bolts installed in step 1 and locknuts installed in
steps 2, 3, and 4 to 90 lb-ft (122 N•m).

4.

Insert trailer harness through hole in rear bumper and
connect trailer harness to body harness.

5.

Secure trailer harness to rear bumper with two washers,
bolts, washers, and locknuts.

6.

Install trailer hitch, if removed.

7.

Install rear license plate bracket.

8.

Install swing-away spare tire carrier, if removed. 

 

Figure 9-126:   Rear Bumper Replacement

MOUNTING 

REAR BUMPER

OUTER 

TIEDOWN BRACKET

BODY HARNESS

REAR BUMPER

TRAILER HARNESS

MOUNTING 

BRACKET

BRACKET