Relays Usage
37 Headlamp Washer
38 Rear Window Washer
39 Fog Lamps
40 Horn
41 Fuel Pump
42 Windshield Wipers/Washer
43 High-Beam Headlamp
44 Air Conditioning
45 Cooling Fan
46 Headlamp Driver Module
47 Starter
49 Electric Adjustable Pedal
60 Powertrain
Miscellaneous Usage
48 Instrument Panel Battery
Rear Underseat Fuse Block
5-102
Fuses Usage
24 Unlock
25 Blank
26 Blank
27OnStar
®Overhead Battery,
OnStar®System
28 Sunroof
29 Rainsense™ Wipers
30 Parking Lamps
31 Truck Body Controller Accessory
32 Truck Body Controller 5
33 Front Wipers
34 Vehicle Stop
35 Transmission Control Module
36 Heat Ventilation Air Conditioning B
37 Front Parking Lamps
38 Left Turn Signal
Fuses Usage
39 Heat Ventilation Air Conditioning I
40 Truck Body Controller 4
41 Radio
42 Trailer Park
43 Right Turn Signal
44 Heat Ventilation Air Conditioning
45 Rear Fog Lamps
46 Auxiliary Power 1
47 Ignition 0
48 Four-Wheel Drive
49 Blank
50 Truck Body Controller Ignition
51 Brakes
52 Truck Body Controller Run
5-104
Additional Required Services (cont’d)
Service and Miles (Kilometers)25,000
(41 500)50,000
(83 000)75,000
(125 000)100,000
(166 000)125,000
(207 500)150,000
(240 000)
V8 engine only: Inspect spark plug
wires.An Emission Control Service.•
Engine cooling system service
(or every ve years, whichever occurs
rst).An Emission Control Service.
See footnote (i).•
Inspect engine accessory drive belt.
An Emission Control Service.
See footnote (l).•
Maintenance Footnotes
(a)Visually inspect brake lines and hoses for proper
hook-up, binding, leaks, cracks, cha ng, etc. Inspect
disc brake pads for wear and rotors for surface
condition. Inspect other brake parts, including calipers,
parking brake, etc.
(b)Visually inspect front and rear suspension and
steering system for damaged, loose, or missing parts or
signs of wear. Inspect power steering lines and hoses
for proper hook-up, binding, leaks, cracks, cha ng, etc.(c)Visually inspect hoses and have them replaced if
they are cracked, swollen, or deteriorated. Inspect
all pipes, ttings and clamps; replace with genuine
GM parts as needed. To help ensure proper operation,
a pressure test of the cooling system and pressure
cap and cleaning the outside of the radiator and
air conditioning condenser is recommended at least
once a year.
(d)Visually inspect wiper blades for wear or cracking.
Replace wiper blades that appear worn or damaged
or that streak or miss areas of the windshield.
6-7
A
Accessories and Modi cations............................ 5-3
Accessory In ator...........................................5-68
Accessory Power Outlet(s)...............................3-18
Adding Equipment to Your Airbag-Equipped
Vehicle.......................................................1-61
Additives, Fuel................................................. 5-6
Add-On Electrical Equipment............................5-94
Adjustable Throttle and Brake Pedal..................2-20
Air Cleaner/Filter, Engine.................................5-20
Air Conditioning..............................................3-19
Air Suspension...............................................4-50
Airbag
Passenger Status Indicator...........................3-30
Readiness Light..........................................3-29
Airbag Sensing and Diagnostic Module (SDM)...... 7-9
Airbag System................................................1-48
Adding Equipment to Your Airbag-Equipped
Vehicle...................................................1-61
How Does an Airbag Restrain?......................1-54
Passenger Sensing System...........................1-56
Servicing Your Airbag-Equipped Vehicle..........1-60
What Makes an Airbag In ate?......................1-54
What Will You See After an Airbag In ates?....1-55
When Should an Airbag In ate?....................1-53
Where Are the Airbags?...............................1-50
All-Wheel Drive...............................................5-45
All-Wheel-Drive (AWD) System.........................4-13
All-Wheel-Drive Service Light............................3-41Antenna, Fixed Mast......................................3-130
Antenna, XM™ Satellite Radio Antenna
System.....................................................3-130
Anti-Lock Brake System (ABS)........................... 4-7
Anti-Lock Brake, System Warning Light..............3-34
Appearance Care
Aluminum Wheels........................................5-90
Care of Safety Belts....................................5-88
Chemical Paint Spotting...............................5-92
Cleaning Exterior Lamps/Lenses....................5-89
Cleaning the Inside of Your Vehicle................5-85
Fabric/Carpet..............................................5-87
Finish Care.................................................5-89
Finish Damage............................................5-92
Instrument Panel, Vinyl, and Other
Plastic Surfaces.......................................5-88
Leather......................................................5-87
Sheet Metal Damage...................................5-91
Tires..........................................................5-91
Underbody Maintenance...............................5-92
Vehicle Care/Appearance Materials................5-93
Washing Your Vehicle...................................5-88
Windshield, Backglass, and Wiper Blades.......5-90
Ashtray(s)......................................................3-18
Audio System(s).............................................3-58
Audio Steering Wheel Controls....................3-126
Care of Your Cassette Tape Player...............3-128
Care of Your CD and DVD Player................3-129
Care of Your CDs and DVDs.......................3-129
Chime Level Adjustment.............................3-130
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