GMC 2004 Defense User manual

i
2004 General Motors Light Service Support Vehicle (LSSV)
Military Truck Owner’s Manual Supplement
Seats and Restraints Systems........................................1-1
Troop Seats...................................................................1-2
Restraints........................................................................1-3
Instrument Panel..................................................................3-1
Exterior Lamps..............................................................3-2
Interior Lamps.......................................................3-6
Warning Lights, Gages and Indicators...................3-7
Service and Appearance Care.........................................5-1
Underhood Component Locator (Silverado)..........5-2
Underhood Component Locator (Tahoe)................5-3
Jump Starting................................................................5-4
Vent Filters.....................................................................5-11
Bulb Replacement .....................................................5-12
Replacement Bulbs.....................................................5-13
Tires.................................................................................5-13
Appearance Care.........................................................5-14
Vehicle Information.......................................................5-15
Electrical System..........................................................5-16
Maintenance Schedule.......................................................6-1
Maintenance Schedule................................................6-2
Customer Assistance Information..................................7-1
Customer Assistance Information............................7-2
Features and Controls........................................................2-1
Windows..........................................................................2-2
Starting and Operating the Vehicle...........................2-3
Vehicle Load Disconnect Switch...............................2-4
Storage Areas................................................................2-5
Weapons Mount............................................................2-7
Driving The Vehicle............................................................4-1
Your Driving, the Road and the Vehicle..................4-2
Towing..............................................................................4-6
Index........................................................................................8-1

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The information in this manual pertains to the operation
of the vehicle. It also contains the vehicle’s scheduled
maintenance services. This manual along with the
owner’s manual will assist you in the proper use and
maintenance of the vehicle. The sections in this
supplement correspond to the sections in the 2004 Vehicle
Owner’s Manual and the 2004 Duramax Diesel Engine
Owner’s Manual Supplement.
Please keep this supplement with the owner’s manual
and diesel supplement in the vehicle, so it will be there
if you ever need it while you’re on the road.
This manual includes the latest information at the time
it was printed. We reserve the right to make changes in
the product after that time without notice.
Litho in USA
Part No. LSSVOM04 First Edition
Copyright General Motors Corporation 08/23/04
All Rights Reserved.
©
How to Use This Manual
Many people read the owner’s manual from beginning to
end when they first receive the vehicle. If you do this, it
will help you learn about the features and controls for the
vehicle. In this manual, you’ll find that pictures and
words work together to explain things.

iii
These mean there is something that could hurt you
or other people.
Notice: These mean there is something that
could damage the vehicle.
Index
A good place to look for what you need is the Index in
back of the manual. It’s an alphabetical list of what’s in
the manual, and the page number where you’ll find it.
Driving the Vehicle
As with other vehicles of this type, failure to operate this
vehicle correctly may result in loss of control or an
accident. Refer to “The Driving, the Road and the Vehicle”
and “Off-Road Driving with The Four-Wheel-Drive Vehicle”
in the 2004 Vehicle Owner’s Manual.
Safety Warnings and Symbols
You will find a number of safety cautions in this book. We
use a box and the word CAUTION to tell you about things
that could cause personal injury if you were to ignore the
warning.
In the caution area, we tell you what the hazard is. Then
we tell you what to do to help avoid or reduce the hazard.
Please read these cautions. If you don’t, you or others
could be hurt.
In the notice area, we tell you about something that can
damage the vehicle. Many times, this damage would not
be covered by the warranty, and it could be costly. But the
notice will tell you what to do to help avoid the damage.
Vehicle Damage Warnings
Also, in this supplement manual you will find notices.
When you read other manuals, you might see CAUTION
and NOTICE warnings in different colors or in different
words.
You’ll also see warning labels on the vehicle.
They use the same words, CAUTION or NOTICE.
CAUTION:

iv
NOTES

1-1
Section 1 Seats and Restraints
Troop Seats...........................................................................1-2
Folding the Seat Down...............................................1-2
Folding the Seat Up.....................................................1-3
Restraints...............................................................................1-3
Rear Safety Strap.........................................................1-3

1-2
1. Remove the pin and place the legs into the joint
of the cargo area side and the floor.
Troop Seats
If the vehicle is equipped with troop seats, this feature
provides space for up to eight passengers in the cargo
area of the pickup model. The seats can be lowered
individually for use or raised for storage. The seats lock
in both the up and down positions.
When the seat is in the up position, the quick release pin
will go through the left-hand leg for passenger’s side
seats or a right-hand leg for driver’s side seats. It will
then go through the seat channel and will be placed in
front of the hinge pin.
9556
Troop Seat Operation
15363
Folding the Seat Down
A quick-release pin is located on the left or right side
of the troop seat leg immediately under the hinge pin.

1-3
2. Place the pin in the hole provided under the hinge
pin. The seat is now locked in the down position.
Reverse Steps 1 and 2.
To remove the troop seats, refer to Seats in the 2004
LSSV Military Trucks service manual supplement.
9557
Folding the Seat Up
Restraints
Rear Safety Strap
Whenever the troop seats are occupied, the safety strap
should be attached across the top of the rear seat backs
using the eye-bolts provided.
9559

1-4
NOTES

2-1
Section 2 Features and Controls
Windows.................................................................................2-2
Rear Topper Window...................................................2-2
Side Topper Window...................................................2-2
Sliding Rear Window...................................................2-3
Starting and Operating the Vehicle..................................2-3
Starting The Engine....................................................2-3
Vehicle Load Disconnect Switch ..................................2-4
Storage Areas.......................................................................2-5
Cargo Cover-Soft Top..................................................2-5
Rolling Up the Side Panels.......................................2-5
Storing the Cargo Cover..............................................2-5
Weapons Mount...................................................................2-7
Weapons Mount (Floor Mount)..................................2-7
Weapons Mount (Cab Mount)....................................2-8

2-2
Opening the Rear Window Door
1. Turn both handles (A) clockwise 90°.
2. Pull open the rear window door. A cylinder on both
sides of the window will assist with opening and
hold the window in the open position.
Closing Rear Window Door
1. Pull the window door down.
2. Turn both handles (A) counter clockwise 90°.
Windows
Side Topper Window
1. Pull the window door down.
2. Turn both handles (A) counter clockwise 90°.
Closing the Side Window Doors
Open the Side Window Doors
1. Turn both handles (A) clockwise 90°.
2. Pull open the window door. A cylinder on both sides
of the window will assist with opening and hold
the window in the open position.
10317
10316
If the vehicle is equipped with a topper, it features
tempered opening windows that have locking handles.
Rear Topper Window
Notice: The window must be fully closed before
operation of the vehicle.
Notice: The window must be fully closed before
operation of the vehicle.

2-3
Sliding Rear Window
If the vehicle is equipped with a sliding rear window, it
features tempered glass surrounded by a durable black
finish aluminum frame and three panel design. Locking
latch adds cab security.
To open the window hold the latch in the open position
and slide the window open. To close the window slide
the window until the latch is fully engaged against the
frame.
The diesel engine starts differently than a gasoline
engine.
Refer to the 2004 Duramax Diesel Engine Owner’s
Manual Supplement, located in the glove compartment.
Do not use gasoline or starting “aids,” such as ether,
in the air intake. They could damage the engine. There
could also be a fire, which could cause serious
personal injury.
Starting and Operating the
Vehicle
Starting the Engine
15030
CAUTION:

2-4
Vehicle Load Disconnect Switch
If the vehicle is equipped with a load disconnect switch,
the switch disconnects 12-volt vehicle loads and 24-volt
trailer/aux loads that could cause a parasitic drain on the
batteries.
The switch should be placed in the OFF position when
the vehicle is parked for an extended period of time.
The load disconnect switch is located on the underhood
fuse block. The underhood fuse block is located on the
driver’s side of the vehicle, to the rear of the battery.
Notice: The main battery feeds to starter and NATO
jump start connector remain powered.
15364

2-5
If the vehicle is equipped with a soft top cargo cover, it
must be fully installed and properly anchored before
traveling on the highway. The side panels and rear panel
of the cargo cover can be rolled up. The cargo cover
allows ventilation within the closed portion through
opening vents located on the front of the top.
4. Pull apart the velcro flaps on both side panels near
the back of the vehicle.
Storing the Cargo Cover:
1. Release tension on the hooks by pushing the
release on the front of the hook.
2. Remove the plastic hook from the bed fastener.
3. Pull apart the velcro flaps on both side panels near
the vehicle cab.
4. Pull apart the velcro flaps on both panels near
the back of the vehicle.
5. Release the six cover straps, located inside the
cargo box that attaches the cover to the cargo cover
bows.
6. Remove the cover from the cargo cover bows.
7. Fold the cover neatly and store it behind the seat in
the truck cab.
9560
Storage Areas
Cargo Cover-Soft Top
Rolling Up the Side Panels:
1. Release tension on
the hooks by pushing
the release on the front
of the hook.
2. Remove the plastic
hook from the bed fas-
tener.
3. Pull apart the velcro
flaps on both side
panels near the vehicle
cab.
5. Roll the sides upward.
6. When the sides reach the top, they can be held in
place by inserting the cargo cover straps in the clips
at the top of the cargo cover.

2-6
13. Secure the bows in place with the front support straps.
14. To reinstall the cargo cover, reverse Steps 1 - 13.
Note: The cargo cover is marked with the word FRONT
on the inside top to aid in proper positioning of the cover
onto the vehicle.
8. Release the four corner
support straps.
10. Stack the bows on top of each other without
striking the cab or the troop seats (if equipped),
push down equally on both sides of the upper part
of the front and rear bows.
11. Pull upward equally on both sides of the upper part
of the center bow.
12. Standing at the rear of the vehicle, push the bows
forward.
9562
9. Remove the six quick release pins from the sides of
the cargo cover bows.
9563
15338

2-7
Weapons Mount
Weapon Mount (Floor Mount)
If the weapon is improperly stored, it can move
around in a collision or sudden stop. People in the
vehicle could be injured. Be sure to secure any
such item properly. The weapon should be made
safe when stored in this mount.
CAUTION:
The floor mount weapon mount is located behind the
front seats and will secure two weapons.
Mounting the Weapon
1. Place the stock of the weapon into the lower mount.
2. Place the barrel into the upper mount until fully seated
in the clamp.
3. Secure with strap and pull to tighten. Pull the strap
outward and slide it over the barrel of the weapon
and secure the buckle by pulling tight.
14730

2-8
2. Place the barrel into the
upper weapon mount
until fully seated.
3. Pull the strap outward
and slide it over the
barrel of the weapon
and secure the buckle
by pulling tight.
Upper Weapon Mount
10458
To secure weapons in the vehicle’s mount:
Lower Weapon Mount
Weapon Mount (Cab Mount)
6240
If the weapon is improperly stored, it can move
around in a collision or sudden stop. People in the
vehicle could be injured. Be sure to secure any
such item properly. The weapon should be made
safe when stored in this mount.
CAUTION:
1. Place the stock into the
lower weapon mount.
The cab mounted weapon mounts are located at the
rear of the cab and will secure one weapon each.

3-1
Section 3 Instrument Panel
Exterior Lamps.....................................................................3-2
Service and Blackout Lighting...................................3-2
Operating Service and Blackout Lighting................3-4
Interior Lamps......................................................................3-6
Topper Dome Lamp....................................................3-6
Warning Lights, Gages and Indicators...........................3-7
24-Volt Gage...........................................................3-7

3-2
Exterior Lamps
Service and Blackout Lighting
13870
Service Lights/Blackout Control
The switch located on the blackout switch panel next to
the 24-volt gage is the service lights/blackout control.
With the Ignition Switch in the ON Position:
•Pull the switch outward then push upward to the
service ON position. All normal service lamps
will be operational with normal controls.
•Move the service lights/blackout switch to the
center ALL OFF position. All lamps and accessory
power to the vehicle will turn off.
•Move the switch to the blackout position, the
following will occur:
• The blackout lighting system will be operative.
• The front and rear blackout marker lamps will
illuminate.
• The blackout stop lamps will illuminate when
the brakes are applied.
• The instrument panel warning lights will
remain functional.
Notice: If the vehicle is not going to be driven for 24
hours or more, the service lights switch must be placed
in the “ALL OFF” position. This will help prevent drain on
the batteries.
Notice: Before normal driving operations, turn on service
lights to ensure headlights, brake lights and turn signals
are operational.

3-3
Blackout Drive Light Control
The switch located on the blackout switch panel next to
the service light switch is the blackout drive light control.
The service lights/blackout control switch must be in
blackout position or in the down position for the blackout
drive lights to function.
With the ignition switch in the ON position:
• Pull the switch outward then up to the ON
position, the front blackout drive lamp will
activate.
• Pull the switch outward then down to the OFF
position, the blackout drive lamp will deactivate.
• The hazard lights will remain functional.
• The horn will not be functional.
The vehicle’s military 12-pin trailer wiring connector and
trailer lamps are also controlled by this switch.
• The switch will return to the center position
automatically after you release it from either the
ON or OFF position.