Hummer H1 (2002+). Manual - part 256

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 Accessories  13-17

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05745159

Figure 13-37:   Intermediate Shield

Installation

1.

Install intermediate shield to front crossmember and front 
shield with two spacers, washers, bolts, washers, and lock-
nuts. Tighten locknuts to 44 lb-ft (60 N•m) (Figure 13-37). 

2.

Install right support bracket on right mounting bracket
with four washers, bolts, washers, and locknuts. Do not
tighten locknuts (Figure 13-36).

3.

Secure right support bracket to frame rail with washer,
capscrew, washer, and locknut. Tighten locknut to 105 lb-
ft (142 N•m). 

4.

Install left support bracket on left mounting bracket with
four washers, bolts, washers, and locknuts. Do not tighten
locknuts (Figure 13-35). 

5.

Secure left support bracket to engine mount bracket and
frame rail with washer, capscrew, washer, and locknut.
Tighten locknut to 105 lb-ft (142 N•m).

6.

Install two transmission support brackets on transmission
mount crossmember with four washers, bolts, washers,
and locknuts. Tighten locknuts to 24 lb-ft (33 N•m)
(Figure 13-34).

7.

Secure intermediate shield to transmission mount
crossmember and transmission support brackets with four
rubber washers, two washers, bolts, washers and locknuts.
Tighten locknuts to 26 lb-in. (3 N•m).

8.

Tighten locknuts securing support brackets to mounting
brackets to 24 lb-ft (33 N•m).

Transfer Case Shield Replacement

Removal 

Remove two locknuts, washers, bolts, washers, and transfer case
shield from crossmember. Discard locknuts (Figure 13-38).

Installation 

Install transfer case shield on crossmember with two washers,
bolts, washers, and locknuts (Figure 13-38).

Figure 13-38:   Transfer Case Shield

Rear Shield Replacement

Removal 

1.

Remove three locknuts, washers, bolts, washers, and spac-
ers securing rear shield to rear-front crossmember. Discard 
locknuts (Figure 13-39).

2.

Remove three locknuts, washers, bolts, washers, and
shield from mounting brackets. Discard locknuts.

3.

Remove six locknuts, washers, bolts, washers, spacers,
and three mounting brackets from rear-rear crossmember.
Discard locknuts.

Installation 

1.

Install three mounting brackets on rear-rear crossmember 
with six spacers, washers, bolts, washers, and locknuts. 
Tighten locknuts to 24 lb-ft (33 N•m) (Figure 13-39).

2.

Position shield on mounting brackets and secure with
three washers, bolts, washers, and locknuts. Do not tighten
locknuts.

3.

Secure shield to rear-front crossmember with three
spacers, washers, bolts, washers, and locknuts. Tighten
bolts to 44 lb-ft (60 N•m).

4.

Tighten locknuts securing rear shield to mounting brackets
to 24 lb-ft (33 N•m)

FRONT

SHIELD

FRONT

CROSSMEMBER

INTERMEDIATE

SHIELD

TRANSFER CASE

SHIELD

CROSSMEMBER

13-18

Accessories

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.

Figure 13-39:   Rear Shield

ROCKER PANEL PROTECTION REPLACEMENT

Removal

NOTE: Removal of rocker panel protection is similar for both
sides. This procedure covers one side only.

1.

Remove outer kick panels (Section 10).

2.

Pull back carpet from front footwell and rear footwell
(4-door models only).

NOTE: Hex-head screws are secured in place with Loctite 242
and may require considerable effort to break loose.

3.

Remove nine hex-head screws securing rocker panel
protection to body. Support rocker panel protection with
floor jack (Figure 13-40).

Figure 13-40:   Rocker Panel Protection 

4.

Remove three nuts, washers, bolts, washers, and gaskets
securing rocker panel protection to front footwell. Discard
gaskets.

5.

Remove three nuts, washers, bolts, washers, and gaskets
securing spacer (if present) and rocker panel protection to
rear footwell (Figure 13-41).

Figure 13-41:   Rear Footwell

CAUTION: Rocker panel protection is heavy. Remove with a
floor jack.

6.

Remove rocker panel protection from body.

7.

 Inspect three retainer nuts on body. Discard if damaged.

Installation 

CAUTION:  Underbody skid panel is heavy. Raise into place
with a floor jack.

1.

Raise rocker panel protection to body. 

2.

Secure rocker panel protection to rear footwell with three
gaskets, washers, bolts, washers, and nuts. Do not tighten
nuts (Figure 13-41). 

3.

Secure rocker panel protection to front footwell with three
gaskets, washers, bolts, washers, and nuts. Do not tighten
nuts (Figure 13-40). 

4.

Install spacer between rear footwell and rocker panel
protection if necessary. Tighten nuts at front and rear
footwells to 37 lb-ft (50 N•m)  (Figures 13-40 and 13-41).

NOTE: Apply Loctite 242 to threads of hex-head screws.

5.

Remove floor jack and secure rocker panel protection to
body with nine hex-head screws. Tighten hex-head screws
to 37 lb-ft (50 N•m) (Figure 13-40).

6.

Push carpet back in place.

7.

Install outer kick panels (Section 10).

REAR-REAR

MOUNTING

REAR-FRONT

CROSSMEMBER

REAR SHIELD

CROSSMEMBER

 BRACKET

AUXILIARY 

FUEL TANK

SKID PLATE

FRONT

FOOTWELL

GASKET

BODY

ROCKER PANEL

PROTECTION

REAR FOOTWELL

GASKET

SPACER

ROCKER PANEL

PROTECTION

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 Accessories  13-19

®

05745159

TRAILER TOWING

Figure 13-42:   Trailer Wiring Connector and Dummy Plug Location

Trailer Jumper Harness

Hummer vehicles come from the factory equipped for easy in-
stallation of the trailer jumper harness. The trailer jumper har-
ness may be installed as part of the factory trailer towing
package or an add-on kit. Body wiring harnesses are designed
with a trailer wiring connector at the rear of the vehicle body
above the rear bumper (Figure 13-42). Rear bumpers are man-
ufactured with a cut-out for the trailer harness receptacle.

Installation 

1.

Insert the trailer jumper harness through the rear bumper 
cutout and bolt the receptacle in place  (Figure 13-43).

2.

Remove the dummy plug and plug the trailer jumper
harness connector into the trailer wiring connector.

Trailer Brake Controller

Spare wires have been provided in the body harness and routed
from the instrument panel/fuse box area to the trailer connector
at the rear of the vehicle. Install the trailer brake controller us-
ing the manufacturer’s instructions.

The following information about the Hummer electrical system
is necessary for installation:

1.

Three shrink-wrapped wire leads can be found under the 
instrument panel  (Figure 13-44), they are:

a.

Yellow—power

b.

Red—stop light signal

c.

Dark blue—trailer brake

Figure 13-43:   Trailer Jumper Harness Mounting

FRONT OF VEHICLE

TRAILER WIRING 

REAR OF VEHICLE BODY

ABOVE REAR BUMPER

DUMMY PLUG

CONNECTOR

BODY WIRING HARNESS

TRAILER JUMPER HARNESS

RECEPTACLE

REAR BUMPER

TRAILER 

WIRING

CONNECTOR

GASKET

13-20

Accessories

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2.

The trailer brake circuit will not have power until a fuse
(of required amperage) is installed in fuse block position
7H—the far upper right hand corner of the fuse block.

Figure 13-44:   Trailer Brake Controller Wiring 

TRAILER HITCH REPLACEMENT

Removal

1.

Remove locknuts, washers, receiver assembly mounting 
blocks, bolts, and washers from body mount bracket 
(Figure 13-45).

2.

Remove bolts, lockwashers, washers from lower brace
weld nuts. Remove brace from bumper and trailer hitch
mounting brackets.

3.

Remove bolts, washers, and trailer hitch from rear bumper
weld nuts.

Installation 

1.

Position trailer hitch receiver on rear bumper and secure 
with weld nuts, bolts and washers (Figure 13-45). Do not 
tighten at this time.

2.

Secure trailer hitch to body mount bracket with locknuts,
washers, receiver assembly mounting blocks, bolts, and
washers.

3.

Install lower brace to bumper and trailer hitch mounting
bracket with bolts, lockwashers, washers and weld nuts.

4.

Tighten all locknuts to 90 lb-ft (122 N•m).

Figure 13-45:   Trailer Hitch

STEERING COLUMN

DARK BLUE/

RED/STOP LIGHT

YELLOW/

TRAILER BRAKE

POWER

REAR BUMPER

TRAILER 

HITCH

WELD NUT

RECEIVER

TRAILER HITCH

MOUNTING BRACKET

LOWER 

BOLT

LOCKWASHER

WASHER

BRACE

RECEIVER ASSEMBLY

MOUNTING BLOCK

BODY

MOUNT

BRACKET

SIDE BRACKET