To signal a turn, move the lever all the way up or down. When the turn is
finished, the lever will return auto~natically.
A green arrow on the
instrument panel will
flash in the direction
of the turn or lane
change.
To signal a lane change, just raise or lower the lever until the green 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 flash at twice the normal
rate,
a signal bulb may be burned out and other drivers may not see your
turn signal.
If a bulb is burned out, replace it to help avoid an accident. If the green
arrows don’t go on at all when
you signal a turn, check for burned-out bulbs
and
a blown fuse (see “Fuses” in the Index).
Headlamp High-Low Beam
To change the
headlamps from low
beam to high or high
to low, pull the
multifunction lever all
the way toward
you.
Then release it.
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Fuses and Circuit Breakers
The wiring circuits in your vehicle are protected from short circuits by a
combination of fuses, circuit breakers, and fusible thermal links
in the
wiring itself. This greatly reduces
the chance of fires caused by electrical
problems. See “Fuses and Circuit Breakers’’
in the Index for more
information.
Headlamps
The headlamp wiring is protected by a circuit breaker in the lamp switch.
An electrical overload will cause
the lamps to flicker on and off, or in some
cases to remain
off. If this happens, have your headlamp wiring checked
right away.
Windshield Wipers
The windshield wiper motor is protected by a clrculc DreaKer ana a ruse. 11
the motor overheats due to heavy snow, etc., the wiper will stop until the
motor cools. Although the circuit is protected from electrical overload,
overload due to heavy snow, etc., may cause wiper linkage damage. Always
clear ice and heavy snow from the the windshield before using the
windshield wipers. If the overload
is caused by some electrical problem and
not snow, etc., be sure
to get it fixed.
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 and closes. This protects the circuit
until the current load returns to
normal or the problem is fixed.
Trailer Wiring Harness
The standard seven-wire trailer wiring harness is protected by an in-line
fuse in the battery feed wire. This fuse is near the junction block. See
“Trailer Wiring Harness” in the Index for more information.
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Fuse Block
The fuse block access
door is on the driver’s
side edge
of the
instrument panel.
Pull
off the cover to access
the fuse block.
You can remove fuses
with a fuse extractor.
The fuse extractor is
mounted to the fuse
block access door.
To remove fuses if you don’t have a fuse extractor, hold the end of the fuse
between your thumb and index finger and pull straight out.
Be sure to use the correct fuse. If you ever have a problem
on the road and
don’t have a spare fuse, you can “borrow” one
of the correct value. Just pick
some feature of your vehicle that
you can get along without-like the radio
or cigarette lighter-and use its fuse, if
it is of the value you need. Replace
it as soon as you can. See “Fuses and Circuit Breakers” in the Tndex for
more information.
Specification Charts
Replacement Parts
Replacement part numbers listed in this section are based on the latest
information available at the time
of printing, and are subject to change. If a
part listed in this manual is not the same as the part used in your vehicle
when it was built,
or if you have any questions, please contact your GM
truck dealer.
These specifications are for information
only. If you have any questions, see
the service manual for the chassis or refer
to the body manufacturer’s
publications.
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Fuses and Circuit Breakers
POSITION NAME
1. STOP/HAZ
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
IS.
16.
17.
18.
19.
20.
21. 22.
T CASE
CTSY
GAGES
RR HVAC
CRUISE
AUX PWR
CRANK
PARK LPS
AIR BAG
WIPER HTR-A/C
CIG LTR
ILLUM
DRL-FOG
TURN-B/U RADIO
BRAKE RADIO
BATT
TRANS
CIRCUITS PROTECTED
Stop/TCC Switch, Buzzer, CHMSL, Hazard
Lamps, Stop Lamps
Transfer Case
Courtesy Lamps, Cargo Lamp, Glove Box
Light, Dome/RDG Lamps, Vanity Mirrors,
Pwr Mirrors
IP Cluster, DRL Relay, HDLP Switch,
Keyless Entry, Low Coolant Module
RR HVAC Controls
Cruise Control
Aux Power Outlet
Diesel Fuel Pump, DERM, ECM
Lic Lamp, Park Lamp, Tail Lamp, Roof
Marker Lamp, Tail Gate Lamps, Front Side
Markers, Fog Lamp Relay, Door Switch
Illum, Fender Lamps
DERM
Wiper Motor, Washer Pump
A/C, A/C Blower, High Blower Relay
Power Amp, Cig Lighter, Door Lock Relay,
Pwr Lumbar Seat
4WD, Indicator, LP Cluster, HVAC
Controls,
RR HVAC Controls, IP Switches,
Radio Illumination
DRL Relay, Fog Lamp Relay
Frt Turn, RR Turn, B/U Lps
Radio (Ign)
DRAC, 4WAL PCM, ABS, Cruise
Radio (Batt)
PRNDL, Auto Transmission, Speedo,
Check Gages
Tell Tale
Not Used
Not Used
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Break.In. New Vehicle ............................................ 2-9
Composite Headlamps ......................................... 6-49
Bulb Replacement Center
High Mounted Stop Lamp (CHMSL) ........................ 6-54
Fender Marker Lamps .......................................... 6-53
Front Park/Turn Signal Lamps with Composite Headlamps ............ 6-51
Front Park/Turn Signal Lamps with Sealed Beam Headlamps ........... 6-50
HalogenBulbs ................................................ 6-48
Rear Lamps (Chassis Cab Models) ................................ 6-56
Rear Lamps (Pickup Models) .................................... 6-55
Replacement Chart ............................................. 6-88
Roof Marker Lamps ........................................... 6-54
Sealed Beam Headlamps ........................................ 6-47
Side Marker Lamps ............................................ 6-52
Tailgate Marker Lamps ......................................... 6-53
C
Capacities and Specifications ....................................... 6-80
CarbonMonoxide ............................................... 2-32
Care of Your Cassette Tape Player (See “Audio Systems” )
Cassette Tape Player System (See “Audio Systems” )
Catalyticconverter .............................................. 6-57
Center High Mounted Stop Lamp (CHMSL) (See “Lamps” )
Certificatioflire Label ........................................... 4-37
Changing a Flat Tire .............................................. 5-26
Chemical Paint Spotting ........................................... 6-74
Cigarette LightedAshtrays ......................................... 2-58
Child Restraints (See “Safety Belts”)
Circuit Breakers (See “Fuses and Circuit Breakers”)
Cleaning DieselEngine
................................................ 6-14
Fabric Protection .............................................. 6-69
Finishcare .................................................. 6-72
Glass ....................................................... 6-71
InsideofVehicle .............................................. 6-68
Leather ..................................................... 6-70
Instrument Panel, Top .......................................... 6-70
Outside of Vehicle ............................................. 6-72
Outside of the Windshield and Wiper Blades ........................ 6-71
Special Problems .............................................. 6-69
Vinyl ....................................................... 6-70
Weatherstrips ................................................. 6-71
Audio System with AUTO TONE System ........................... 3-7
Audio System without AUTO TONE System ........................ 3-6
Underbody .................................................. 6-74
WheelsandTires .............................................. 6-73
Clock, Setting the
ComfortControls
................................................. 3-1
Compact Disc (CD) System (See “Audio Systems”)
Compass
....................................................... 2-54
Control of a Vehicle ............................................... 4-4
Coolant (See “Engine”)
Cooling System Capacity
.......................................... 6-82
Courtesy Transportation ............................................ 8-7
CrankcaseCapacity .............................................. 6-83
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Engine (continued)
Coolant
..................................................... 6-35
Coolant Heater
...................................... 2.18.3-4. 6.21
Coolant Temperature Gage (See “Gages”)
Control Module System
........................................ 6-57
Diesel Heater Output
............................................ 34
Exhaust
..................................................... 2-32
FanNoise
................................................... 5-25
Identification
....................................... 6-76,677, 6-81
Oil (See “Oil”)
Overheating
.................................................. 5-10
RunningWhileParked
......................................... 2-32
Starting Your Gasoline Engine
................................... 2-12
Starting Your Diesel Engine
..................................... 2-14
Exhaustsystem
................................................. 6-56
F
Filter Replacement Chart (See “Service-Replacement Parts and Filter
Recommendations”)
FinishDamage
.................................................. 6-74
Fluid Capacities (See “Capacities and Specification”)
FluidLeakCheck
................................................ 646
Fluids (See “Scheduled Maintenance Services”)
Fog Lamps (See “Lamps-Fog”)
Four-WheelDrive
.......................................... 2-33, 6-33
Front Axle Locking Feature
..................................... 2-36
Transfer Case
........................................... 2-34, 6-33
Canadian
...................................................... 6-5
Diesel
....................................................... 6-3
FillingYourTank
............................................. 6-11
Fuel
Foreign Countries (Gasoline Engines)
............................. 6-11
Filter Replacement (Diesel Engines)
............................... 6-9
Gage (See “Gages”)
Gasoline
..................................................... 6-2
Gasolines for Cleaner Air
........................................ 6-3
Running Out of Fuel (Diesel Engines)
.............................. 6-8
Tankcapacity
................................................ 6-83
Water in Fuel (Diesel Engines)
............................... 2-74, 6-5
Fuses and Circuit Breakers ................................... 6-79, 6-87
FuseBlock
............................................. 6-80, 6-86
G
Gages Engine Coolant Temperature Gage
................................ 2-80
Oil Pressure Gage
............................................. 2-81
Tamper Resistant Odometer ..................................... 2-69
Trip Odometer
................................................ 2-69
FuelGage
................................................... 2-79
Speedometer
................................................. 2-69
Tachometer
.................................................. 2-70
Voltmeter
.................................................... 2-82
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