2003 GMC SIERRA DENALI fuse

Doing Your Own Service Work
If you want to do some of your own service work, you’ll
want to use the proper service manual. It tells you
much more about how to service your vehicle than this
manual can.
To order the proper service manual,
see
Service Publications Ordering Information on
page
7- IO.
Your vehicle has an air bag system. Before attempting
to do your own service work, see
Servicing Your Air
Bag-Equipped Vehicle on page 1-72.
You should keep a record with all parts receipts and list
the mileage and the date
of any service work you
perform. See
Pat? E: Maintenance Record on page 6- 18.
.3u can be injured and your vehicle could be
damaged if you try to do service work on a
vehicle without knowing enough about
it.
Be sure you have sufficient knowledge,
experience, the proper replacement parts and tools before
you attempt any vehicle
maintenance task.
Be sure to use the proper nuts, bolts and
other fasteners. “English” and “metric”
fasteners can be easily confused.
If you
use the wrong fasteners, parts can later
break or fall off.
You could be hurt.
Adding Equipment to the Outside
of Your Vehicle
Things you might add to the outside of your vehicle
can affect the airflow around it. This may cause
wind noise and affect windshield washer performance.
Check with your dealer before adding equipment to
the outside of your vehicle.
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A. Engine Air CleanedFilter
B. Coolant Surge Tank
C. Air CleanerlFilter Restriction Indicator
B. Engine Oil Dipstick
E. Engine Oil Fill Cap
F. Automatic Transmission Dipstick
G. Fan
H. Remote Negative
(-) Terminal (GND)
I. Remote Positive (+) Terminal
J. Power Steering Fluid Reservoir
K. Brake Fluid Reservoir
L. Underhood Fuse Block
M. Battery
N. Windshield Washer Fluid Reservoir
Engine Oil
If the CHECK ENG OIL LEVEL message appears on
the instrument cluster, it means you need to check your
engine
oil level right away.
For more information, see “CHECK ENG
OIL LEVEL”
under
DIC Warnings and Messages on page 3-53.
You should check your engine oil level regularly; this is
an added reminder.
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Electrical System
Add-on Electrical Equipment
Notice: Don’t add anything electrical to your
vehicle unless you check with your dealer first.
Some electrical equipment can damage your vehicle
and the damage wouldn’t be covered by your
warranty. Some add-on electrical equipment can
keep other components from working as they
should.
Your vehicle has an air bag system. Before attempting
to add anything electrical to your vehicle, see
Servicing Your Air Bag-Equipped Vehicle on page 1-72.
Windshield Wiper Fuses
The windshield wiper motor is protected by an internal
circuit breaker and a fuse.
If the motor overheats due to
heavy snow, etc., the wiper will stop until the motor
cools. 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 protect the power windows and other
power accessories. When the current load
is too heavy,
the circuit breaker opens and closes, protecting the
circuit until the problem is fixed or goes away.
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. This greatly reduces the
chance of fires caused by electrical problems.
Look at the silver-colored band inside the fuse. If the
band is broken or melted, replace the fuse. Be sure you
replace a bad fuse with a new one
of the identical
size and rating.
If you ever have a problem on the road and don’t have
a spare fuse, you can borrow one that has the same
amperage. 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 the correct
amperage. Replace it as soon as you can.
5-95

Instrument Panel 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 which
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.
You may have spare fuses located behind the fuse
block access door. These can be used to replace
a bad
fuse. However, make sure it is of the correct amperage.
II
LT DOORS U
Fuses
SEO ACCY Not
Used
RR Wiper
Usage
TBC
ACCY Windshield Wipers
WS
WPR Accessory
Special Equipment Option
Ignition, Heated Seats
IGN 3
Accessory Truck Body Controller
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DRIVER UNLOCK
Fuses Usage
LT TRLR ST/TRN Left Turn SignaVStop Trailer
LT TRN Left Turn Signals
and
Sidemarkers
VEH STOP
5-97

Center Instrument Panel Fuse Block
The center instrument panel utility block is located
underneath the instrument panel, to the left of the
steering column.
Device Special Equipment ODtion
SEO Usage
TRAILER Upfitter (Not Used)
UPFIT Trailer
Brake Wiring
1 SL RIDE I
Ride Control Harness
Connection
I Device I Usage I
HDLR 2
Bodv Wiring Connector
BODY Headliner Wiring
connector-
DEFOG Headliner Wiring Connector
1 HDLNR 1
Rear Defogger Relay
I SPARE RELAY I Not Used I
CB SEAT Driver
and Passenger Seat
Module Circuit Breaker
I CB RT DOOR I
Right Power Windows Circuit
Breaker
I
I SPARE I Not Used I
I INFO I
~-
Infotainment Harness
Connection
1
5-98

Underhood Fuse Block The underhood fuse block in the engine compartment
on the driver's side of the vehicle near the battery.
Lift the cover for access to the fusehelay block.
To remove fuses hold the end of the fuse between your
thumb and
index finger and pull straight out.
See
Engine Compartment Overview on page 5-12 for
more information on its location.
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Replace cover after servicing. Remettre le couvercle en place.
I ? i I I I I I
I
I I I
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I I I L I 1 I I L
B+
GLOW I PLUG
OR I
I CUST I FEED I I -_--l
NOTE: The function and FUNCTION/AMy-GAS
amperage of these fuses FONCTION/INTENSIT!-ESSENCE FONCTIONIINTENSITE-DIESEL ces fusibles sont diffbrentes pour les
FUNCTION/AMP-QlESEL * REMARQUE: La fonction
et I'intensitk de
are different for gas and INJ 2/15A EDU/25A moteurs essence et les rnoteurs diesel.
diesel fueled engines. See
Owners Manual for
functions
of studs #I and #2. ECMV15A f
tCMRPV/I5A
FUEL HT/15A Voir le Guide du propri6taire a pour
les fonctions des plots 1 et 2.
5- 1 00