Turn and Lane-Change Signals
The turn signal has two upward (for right) and two
downward (for left) positions. These positions allow you
to signal a turn or a lane change.
To signal a turn, move the lever all the way up or down.
When the turn is finished, the lever will return
automatically.
An arrow on the instrument
panel cluster will flash in
the direction of the
turn or lane change.
To signal a lane change, just raise or lower the lever
until the arrow starts to flash. Hold it there until you
complete your lane change. The lever will return by itself
when you release it.
As you signal a turn or a lane change, if the arrows
don’t flash but just stay on, check the turn signal flasher
and circuit breaker. SeeFuses and Circuit Breakers
on page 5-87.
If a bulb is burned out, replace it to help avoid an
accident. If the arrows don’t go on at all when you signal a
turn, check the circuit breaker and for burned-out bulbs.
Headlamp High/Low-Beam Changer
To change the headlamps from low to high beam or high
to low beam, pull the multifunction lever all the way
toward you, then release it.
When the high beams are
on, this light on the
instrument panel cluster
will also be on.
Windshield Wipers
You control the windshield
wipers by turning the band
with the wiper symbol
on it.
9(Off):Turn the band on the lever to this symbol to
turn off the windshield wipers.
3-8
Certain electrical accessories may not be compatible
with the accessory power outlet and could result
in blown vehicle or adapter fuses. If you experience a
problem, see your dealer for additional information
on accessory power outlets.
Notice:Adding any electrical equipment to your
vehicle may damage it or keep other components
from working as they should. The repairs would not
be covered by your warranty. Check with your
dealer before adding electrical equipment.
When adding electrical equipment, be sure to follow the
proper installation instructions included with the
equipment.
Notice:Improper use of the power outlet can cause
damage not covered by your warranty. Do not
hang any type of accessory or accessory bracket
from the plug because the power outlets are
designed for accessory power plugs only.Ashtrays and Cigarette Lighter
Your vehicle may have an ashtray and a cigarette
lighter located in the center floor console. To open the
removeable ashtray, flip open the top.
Notice:If you put papers or other ammable items
in the ashtray, hot cigarettes or other smoking
materials could ignite them and possibly damage
your vehicle. Never put ammable items in the
ashtray.
To use the cigarette lighter, push it in all the way and let
it go. When it’s ready, it will pop back out by itself.
Notice:Holding a cigarette lighter in while it
is heating will not allow the lighter to back away
from the heating element when it is hot. Damage
from overheating may occur to the lighter or heating
element, or a fuse could be blown. Do not hold a
cigarette lighter in while it is heating.
3-18
Automatic Ether Injection System....................5-66
Front Wheel Bearings with Oil-Filled Hubs........5-67
Air Conditioning System.................................5-67
Tires..............................................................5-68
Inflation - Tire Pressure.................................5-68
Rims and Wheels.........................................5-69
Dual Tire Operation.......................................5-69
When It Is Time for New Tires.......................5-70
Wheel Alignment and Tire Balance..................5-70
Tightening the Wheel Nuts.............................5-71
Wheel Replacement......................................5-74
If a Tire Goes Flat........................................5-75
Changing a Flat Tire.....................................5-76
Appearance Care............................................5-76
Cleaning the Inside of Your Vehicle.................5-77
Care of Safety Belts......................................5-79
Weatherstrips...............................................5-79
Cleaning the Outside of Your Vehicle..............5-80
Sheet Metal Damage.....................................5-82Finish Damage.............................................5-83
Underbody Maintenance................................5-83
Chemical Paint Spotting.................................5-83
Vehicle Care/Appearance Materials..................5-84
Vehicle Identi cation......................................5-85
Vehicle Identification Number (VIN).................5-85
Service Statement.........................................5-85
Service Parts Identification Label.....................5-86
Electrical System............................................5-86
Add-On Electrical Equipment..........................5-86
Headlamp Wiring..........................................5-86
Windshield Wiper Fuses................................5-87
Fusible Links................................................5-87
Power Windows and Other Power Options.......5-87
Fuses and Circuit Breakers............................5-87
Capacities and Speci cations..........................5-93
Normal Maintenance Replacement Parts.........5-100
Engine Drive Belt Routing............................5-103
Section 5 Service and Appearance Care
5-2
Windshield Wiper Fuses
The windshield wiper motor is protected by a circuit
breaker inside the motor and a circuit breaker or fuse in
the fuse block. If the motor overheats, the wipers will
stop until the motor cools. If the overload is caused by
an electrical problem, be sure to get it fixed.
Fusible Links
A fusible link is a short piece of wire several gauge
sizes smaller than the circuit it protects. It will melt in an
overload situation, opening the circuit.
Your starter and other circuits have these fusible links.
The size is printed on the insulation. If the insulation
is burned beyond recognition, consult your GM dealer
for the proper size. Replace a fusible link with one of the
same size and insulation type. Fusible link insulation
is a special purpose high-temperature material.
The hydraulic brake booster motor feed circuit and
starter circuit are protected by a fusible link. Vehicles
with a diesel engine have a fusible link for the intake
heater feed circuit.
Power Windows and Other Power
Options
Circuit breakers in the fuse panel protect the power
windows and other power accessories. When the current
load is too heavy, the circuit breaker opens. This
protects the circuit until the current load returns to
normal or the problem is fixed.
Fuses and Circuit Breakers
The wiring circuits in your vehicle are protected from
short circuits by a combination of fuses, circuit breakers,
maxi-fuses and fusible links. This greatly reduces the
chance of a fire caused by an electrical problem. There
may be a fuse taped to the wiring harness near the
hydraulic brake booster.
5-87
Instrument Panel Fuse Block
There are two instrument panel fuse blocks located behind the instrument panel on the passenger’s side of
the vehicle.
Be sure to replace fuses with fuses of the same rating. Do not use fuses of higher amperage than those indicated on
the fuse block.
Fuse Block 1
5-88
Underhood Fuse Block
When a circuit goes out, the problem could be in either
the primary or secondary underhood fuse blocks.
These blocks uses blade-type fuses.
Both underhood fuse
blocks are located in the
engine compartment,
on the passenger’s side of
the vehicle.
To access the fuse blocks, gently squeeze both sides of
the cover to unlatch the tabs at the top. Then, unsnap
both attachments at the bottom and remove the cover.
Be sure to replace fuses with fuses of the same
rating. Do not use fuses of higher amperage than those
indicated on the fuse block.Relay Usage
NOTE 1 LG4 Powertrain Control Valve,
L18/LB7 Fuel Pump, LG5 Heated
Fuel
IGN B Ignition
STARTER Starter
HORN Horn
IGN A Ignition Primary Underhood
Fuse Block
Primary Underhood Fuse Block
5-91
Driving on Snow or Ice....................................4-26
Driving Through Deep Standing Water...............4-20
Driving Through Flowing Water.........................4-20
Dual Tire Operation.........................................5-69
E
Eaton®Fuller®Five and Six-Speed
Transmissions and TTC Spicer Seven-Speed
Transmissions.............................................2-30
Eaton
®Fuller®Nine and Ten-Speed
Non-Synchronized Manual Transmissions........2-32
Electric Air Compressor...................................5-51
Electrical Connections......................................4-36
Electrical System
Add-On Equipment......................................5-86
Fuses and Circuit Breakers...........................5-87
Fusible Links..............................................5-87
Headlamp Wiring.........................................5-86
Power Windows and Other Power Options......5-87
Windshield Wiper Fuses...............................5-87
Elevated Idle/Exhaust Restrictor........................2-21
Engine
Air Cleaner/Filter.........................................5-30
Battery.......................................................5-55
Change Engine Oil Light...............................3-39
Check and Service Engine Soon Light............3-37Engine (cont.)
Checks Before Operating..............................2-22
Coolant..............................................5-32, 5-35
Coolant Heater............................................2-23
Coolant Temperature Gage...........................3-35
Diesel Engine Exhaust Brake........................2-25
Drive Belt Routing......................................5-103
Exhaust.....................................................2-37
Fan Noise..................................................5-43
Oil .....................................................5-20, 5-25
Overheating................................................5-36
Overspeed Warning Light..............................3-39
Reduced Power Light...................................3-41
Shutdown Warning Light...............................3-39
Starting Your Diesel.....................................2-14
Starting Your DURAMAX™ Diesel..................2-19
Starting Your Gasoline..................................2-12
Engine Alarm and Automatic Shutdown..............2-16
Engine Coolant Level Check.............................6-24
Engine Cooling System Service........................6-26
Engine Cover Check.......................................6-28
Engine Oil Additives................................5-23, 5-29
Engine Oil Level Check...................................6-24
Engine Road Speed Governor..........................3-25
Engine Speed Limiting.....................................3-25
Engine Starter Over-Crank Protection.................2-12
Event Data Records (EDR)................................ 7-5
Exhaust Brake Indicator Light...........................3-40
5
Exhaust Restrictor (Diesel Engines)...................2-18
Exhaust System Check....................................6-27
Express-Down Feature.....................................2-10
Extender, Safety Belt.......................................1-26
Exterior Lamps...............................................3-13
F
Filter
Engine Air Cleaner......................................5-30
Filter Minder Gage..........................................3-44
Finding a Station............................3-46, 3-49, 3-53
Finish Care....................................................5-80
Finish Damage...............................................5-83
Fixed Mast Antenna........................................3-59
Flat Tire........................................................5-75
Flat Tire, Changing.........................................5-76
Fluid
Automatic Transmission................................5-31
Manual Transmission....................................5-32
Power Steering...........................................5-43
Windshield Washer......................................5-44
Fluid Leaks Check..........................................6-28
FM ...............................................................3-57
Folding the Rear Seat (Crew Cab).................... 1-7
Footnotes......................................................6-19
Fore-and-Aft Adjustment.................................... 1-4Four-Wheel and Six-Wheel Drum Brakes
(Air Only)...................................................5-49
Four-Wheel Disc Brakes
(Hydraulic Only)..........................................5-49
Front Wheel Bearings with Oil-Filled Hubs..........5-67
Fuel............................................................... 5-6
Additives...................................................... 5-7
Diesel Engine Fuel........................................ 5-8
Filling a Portable Fuel Container....................5-18
Filling Your Tank..........................................5-17
Filter..........................................................5-64
Filter Replacement.......................................5-15
Fuels in Foreign Countries............................5-16
Gage.........................................................3-42
Gasoline Octane........................................... 5-6
Gasoline Specifications.................................. 5-6
Primary Filter and Water Separator................5-65
Running Out of Fuel....................................5-15
Secondary Filter and Water Separator/Heater....5-66
Very Cold Weather Operation........................5-10
Water in Fuel..............................................5-10
Water in Warning Light.................................3-43
What Fuel to Use.......................................... 5-8
Fuel Filter (Diesel Engines)..............................5-65
Fuel Filter (Gasoline Engines)...........................5-64
Fuel Priming..................................................5-13
Fuses
Fuses and Circuit Breakers...........................5-87
Windshield Wiper.........................................5-87
6