Hummer H1 (2006+). Manual - part 6

1-22

General Information, Lubrication and Maintenance

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Flat Bed/Wheel Lift Towing Procedures

Flat bed/wheel lift tow vehicles are highly recommended. They keep all of the towed vehicle wheels off the pavement. This is im-
portant with full time four wheel drive vehicles.

Loading only requires that the towed vehicle be raised or winched onto the towing platform. A further advantage of this type equip-
ment is that tow speed and distance are not limited. Once the towed vehicle is loaded, set the parking brake, shift the transmission
into Park and install the vehicle tie downs. Tie down attachment points are shown in  Figure 1-12.

Figure 1-12:   Vehicle Tie-Down Points

Conventional Towing Procedures

Front Towing

1.

Loop chains around lower control arms and secure to tow sling (Figure-1-13).

2.

Insert 4” x 4” x 48” length of wood between bumper and sling chains (Figure-1-13).

3.

Raise front end and verify that sling is firmly positioned against front bumper.

4.

Release parking brakes.

5.

Shift transmission into Park and transfer case into Neutral.

6.

Position tow dollies under rear wheels. Proceed with towing operations.

FRAME RAIL/

CROSSMEMBER

LOOP

LOOPS

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Figure 1-13:   Front Towing With Conventional Equipment

Rear Towing

1.

Loop sling chain around frame rails adjacent to rear crossmember and secure to tow sling (Figure-1-14).

2.

Insert 4” x 4” x 48” length of wood between bumper and sling chains (Figure-1-14).

3.

Raise rear end and verify that sling is firmly positioned against rear bumper.

4.

Release parking brakes.

5.

Shift transmission into Park and transfer case into Neutral.

6.

Position tow dollies under front wheels. Proceed with towing operations. 

Figure 1-14:   Rear Towing with Conventional Equipment

SLING

ASSEMBLY

CHAIN

ASSEMBLY

WOOD

CROSSBEAM

LOWER

CONTROL ARM

SLING

ASSEMBLY

SLING

CHAINS

WOOD
BLOCK

CROSSMEMBER

FRAME

RAIL

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General Information, Lubrication and Maintenance

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Conventional Towing When Keys are not Available

If the vehicle doors are locked and the keys are not available you cannot determine that the transmission is in Park and the transfer
case is in “N” (Neutral). In these situations, you must use one of the following towing methods:

a.

Use tow dollies at all wheels and flat tow, 

or

b.

Raise the vehicle front or rear and use tow dollies under the wheels not raised.

Recreational Towing

HUMMER H1 vehicles can be towed behind an RV if desired. A low-boy style vehicle trailer is best for this purpose. Flat towing
is not recommended.

JUMP STARTING

Preparation for Jump Starting

CAUTION: NEVER allow the two vehicles to touch each other when jump starting.

1.

Park the vehicle with the booster battery close to the passenger door of your vehicle. Ensure that the vehicles do not touch each
other. Place the transmissions of both vehicles in “P” (Park), if applicable, and set all parking brakes.

2.

Clean all battery terminals of excess corrosion before connecting jumper cables. 

WARNING:  ALWAYS remove ALL jewelry BEFORE handling batteries.

CAUTION: NEVER disconnect a vehicle’s batteries to jump start. 

3.

Turn off all electrical switches in both vehicles to prevent possible electrical damage to either vehicle’s electrical system.

Jumper Cable Connections

WARNING:  NEVER lean over the batteries when connecting the jumper cables or allow the jumper cable clamps
to touch each other.

1.

Connect one end of the positive jumper cable to the positive (+) terminal on the dead battery. It is best to connect to the positive ter-
minal of the battery closest to the windshield  (Figure-1-15).

WARNING:  ALWAYS make sure that the positive cable is hooked only to positive terminals and the negative to neg-
ative terminals or to a good ground. 

2.

Connect the other end of the positive cable to the positive (+) terminal on the booster battery.

Figure 1-15:   Jumper Cable Connections

3.

Connect one end of the negative jumper cable to the negative (-) terminal on the booster battery.

FRONT OF

VEHICLE

A/C COMPRESSOR
       BRACKET

EGR VALVE

BOOSTER
 BATTERY

NEGATIVE

JUMPER

CABLE

POSITIVE

JUMPER

CABLE

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WARNING:  NEVER connect the other end of the negative jumper cable to the negative (-) terminal on the dead
battery.

4.

Start the booster vehicle.

5.

Connect the other end of the negative cable to a good metallic ground surface on the engine of your vehicle. 
The best ground point is the A/C compressor bracket on the driver’s side of the engine  (Figure-1-16).

t

Figure 1-16:   A/C Compressor Bracket Ground Point

An alternate ground point is the exhaust gas recirculation (EGR) valve on the passenger side of the engine  (Figure-1-17).

Figure 1-17:   EGR Valve Ground Point

Starting the Vehicle

NOTE:  Make sure the jumper cables are clear of any moving parts in the engine compartment.

1.

With the booster vehicle running with a slightly increased engine speed, allow the dead battery to charge for a few minutes and
then start your vehicle. It may take a few tries before your vehicle starts. If your vehicle does not start after cranking for fifteen
seconds, stop the procedure. Cranking for more than fifteen seconds at a time seldom starts the engine and could cause dam-
age.

2.

Once your vehicle starts, disconnect jumper cables.

3.

If the engine stalls, repeat above procedure once, allowing battery to charge for approximately ten minutes. If the engine stalls
a second time, have the vehicle transported to an authorized service center.

NOTE:  To ensure that the batteries are fully charged, have the batteries charged with proper battery charging equipment.

Disconnecting the Jumper Cables 

WARNING:  ALWAYS keep your hands away from moving parts in the engine compartment when disconnecting the
jumper cables.

1.

Remove the negative (-) cable connected to the engine of your vehicle.

2.

Remove the other end of the negative (-) cable from the booster battery.

A/C COMPRESSOR

BRACKET

FRONT OF

VEHICLE

EGR VALVE

FRONT OF

VEHICLE

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