Hummer H1 (2006+). Manual - part 278

9-90 Axles, Suspension and Frame

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4.

Lower the front of the vehicle.

5.

Install the battery tray.

Figure 9-136:   Right Airlift Bracket and Front Upper Control Arm Bracket Replacement

Front Suspension Brace Replacement (Vehicles Without Winch)

Removal

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

1.

Remove the locknut, washer, bolt and the washer securing the brace to the frame rail (Figure  9-137).

2.

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

Installation

1.

Install the brace on the crossmember and the lower control arm with the washer, bolt, washer and the locknut. Do not tighten 
the locknuts (Figure  9-137).

2.

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

3.

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

CONTROL ARM 

UPPER

AIRLIFT BRACKET

FRAME RAIL

RADIATOR SUPPORT

COOLER LINE

BRACKET

BRACKET

CONTROL ARM

SHIM(S)

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 Axles, Suspension and Frame  9-91

Figure 9-137:   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 the lower control arm during removal and in-
stallation.

NOTE: The left and right front suspension braces are replaced basically the same. This procedure covers the left front suspension
brace.

1.

Remove the two locknuts, washers, bolts and the washers securing the front suspension brace to the frame extension (Figure  9-138).

2.

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

Installation

1.

Install the brace on the crossmember and the lower control arm with the washer, bolt, washer and the locknut. Do not tighten 
the locknut (Figure  9-138).

2.

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

3.

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

Figure 9-138:   Front Suspension Brace Replacement for Vehicles With Winch

FRAME RAIL

CROSSMEMBER

BRACE

LOWER 

CONTROL ARM 

CROSSMEMBER

LOWER 

FRAME

EXTENSION

BRACE

CONTROL ARM

S09-010

9-92 Axles, Suspension and Frame

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Splash Shield Support Bracket Replacement

Removal

1.

Remove the locknut, washer, bolt and the washer securing the splash shield to the bracket (Figure  9-139).

NOTE:  Note the direction of the bolts for installation.

2.

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

Installation

1.

Install the bracket on the frame rail with the two washers, bolts, washers and the locknuts. Tighten the locknuts to 90 lb-ft.
(122 N•m) (Figure  9-139).

2.

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

Figure 9-139:   Splash Shield Support Bracket Replacement

Spring Seat Replacement

NOTE: Replacement of the four spring seats is basically the same. This procedure covers the right front spring seat.

Removal

1.

Remove the coil spring.

2.

Remove the four locknuts, washers, bolts, spring bracket and the front spring seat from the frame rail (Figure  9-140).

Installation

1.

Install the spring bracket and the front spring seat on the frame rail with the four washers, bolts, washers and the locknuts.
Tighten the locknuts to 261 lb-ft. (354 N•m) (Figure  9-140).

2.

Install the coil spring.

SPLASH SHIELD

FRAME RAIL

BRACKET

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 Axles, Suspension and Frame  9-93

Figure 9-140:   Front Spring Seat Replacement

Left Engine Mount Bracket Replacement

Removal

1.

Remove the two bolts securing the brake line and the oil line clamps to the engine mount bracket (Figure  9-141).

2.

Remove the two locknuts and the washers securing the engine mount bracket to the insulator.

CAUTION: To avoid engine oil pan damage, a wood block must completely cover the bottom of the oil pan.

3.

Support the engine under the engine oil pan with a wood block and a jack stand (Figure  9-142).

4.

Remove the four locknuts, washers, bolts, washers and the engine mount bracket from the frame rail (Figure  9-141).

Figure 9-141:   Left Engine Bracket Replacement

SPRING BRACKET

FRAME RAIL

FRONT SPRING SEAT

BRAKE

OIL LINE CLAMP

INSULATOR

ENGINE MOUNT

BRACKET

FRAME RAIL

LINE CLAMP