fuse GMC SIERRA 2011 User Guide

Black plate (115,1)GMC Sierra Owner Manual - 2011
Driving and Operating 9-115
Heavy-DutyTrailer Wiring Harness
Package
For vehicles equipped with heavy
duty trailering, the harness is
connected to a bracket on the hitch
platform. The seven-wire harness
contains the following trailer circuits:
.Yellow: Left Stop/Turn Signal
.Dark Green: Right Stop/Turn
Signal
.Brown: Taillamps
.White: Ground
.Light Green: Back-up Lamps
.Red: Battery Feed*
.Dark Blue: Trailer Brake*
*The fuses for these two circuits
are installed in the underhood
electrical center, but the wires are
not connected. They should be
connected by your dealer or a
qualified service center. The fuse
and wire for the ITBC is factory
installed and connected if the
vehicle is equipped with an ITBC.
The fuse for the battery feed is
not required if the vehicle has an
auxiliary battery. If the vehicle does
not have an auxiliary battery, have
your dealer or authorized service
center install the required fuse. If charging a remote (non-vehicle)
battery, press the Tow/Haul Mode
button, if equipped, located at
the end of the shift lever. This will
boost the vehicle system voltage
and properly charge the battery.
If the trailer is too light for Tow/
Haul Mode, or the vehicle is not
equipped with Tow/Haul, turn on
the headlamps as a second way
to boost the vehicle system and
charge the battery.

Black plate (1,1)GMC Sierra Owner Manual - 2011
Vehicle Care 10-1
Vehicle Care
General Information
General Information . . . . . . . . . . 10-2
California Proposition65 Warning . . . . . . . . . . . . . . . . . 10-3
California Perchlorate Materials Requirements . . . . 10-3
Accessories and Modifications . . . . . . . . . . . . . . . 10-3
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . 10-4
Hood . . . . . . . . . . . . . . . . . . . . . . . . 10-5
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . 10-6
Engine Oil . . . . . . . . . . . . . . . . . . . 10-7
Engine Oil Life System . . . . . 10-11
Automatic Transmission Fluid (4-Speed
Transmission) . . . . . . . . . . . . . 10-13
Automatic Transmission Fluid (6-Speed
Transmission) . . . . . . . . . . . . . 10-16
Engine Air Cleaner/Filter . . . . 10-19
Cooling System . . . . . . . . . . . . 10-20
Engine Coolant . . . . . . . . . . . . . 10-22 Engine Overheating . . . . . . . . 10-25
Overheated Engine
Protection
Operating Mode . . . . . . . . . . . 10-28
Engine Fan . . . . . . . . . . . . . . . . . 10-28
Power Steering Fluid . . . . . . . 10-29
Washer Fluid . . . . . . . . . . . . . . . 10-29
Brakes . . . . . . . . . . . . . . . . . . . . . 10-30
Brake Fluid . . . . . . . . . . . . . . . . . 10-32
Battery . . . . . . . . . . . . . . . . . . . . . 10-34
Four-Wheel Drive . . . . . . . . . . . 10-34
Front Axle . . . . . . . . . . . . . . . . . . 10-36
Rear Axle . . . . . . . . . . . . . . . . . . 10-37
Noise Control System . . . . . . 10-38
Starter Switch Check . . . . . . . 10-39
Automatic Transmission Shift
Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . 10-40
Ignition Transmission Lock Check . . . . . . . . . . . . . . . . . . . . . 10-40
Park Brake and P (Park) Mechanism Check . . . . . . . . 10-40
Wiper Blade Replacement . . . . . . . . . . . . . . 10-41
Glass Replacement . . . . . . . . 10-41
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . 10-42
Bulb Replacement
Bulb Replacement . . . . . . . . . . 10-44
Halogen Bulbs . . . . . . . . . . . . . . 10-44
Headlamps . . . . . . . . . . . . . . . . . 10-44
Pick-Up Box Identification and Fender Marker
Lamps . . . . . . . . . . . . . . . . . . . . 10-45
Taillamps (Chassis Cab Models) . . . . . . . . . . . . . . . . . . . 10-46
Taillamps, Turn Signal, Stoplamps, and Back-Up
Lamps . . . . . . . . . . . . . . . . . . . . 10-46
Center High-Mounted Stoplamp (CHMSL) and
Cargo Lamp . . . . . . . . . . . . . . 10-47
License Plate Lamp . . . . . . . . 10-48
Replacement Bulbs . . . . . . . . . 10-48
Electrical System
Electrical System Overload . . . . . . . . . . . . . . . . . . 10-49
Fuses and Circuit Breakers . . . . . . . . . . . . . . . . . . 10-50
Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . 10-50
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . . . 10-54

Black plate (4,1)GMC Sierra Owner Manual - 2011
10-4 Vehicle Care
Vehicle Checks
Doing Your Own
Service Work
If the vehicle is a hybrid, see
the hybrid supplement for more
information.
{WARNING
You can be injured and the
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
attempting any vehicle
maintenance task.(Continued)
WARNING (Continued)
.Be sure to use the proper
nuts, bolts, and other
fasteners. Metric and
English fasteners can be
easily confused. If the wrong
fasteners are used, parts
can later break or fall off.
You could be hurt.
If doing some of your own service
work, use the proper service
manual. It tells you much more
about how to service the vehicle
than this manual can. To order the
proper service manual, see Service
Publications Ordering Information
on page 13‑15. This vehicle has an airbag system.
Before attempting to do your own
service work, see
Airbag System
Check on page 3‑48.
Keep a record with all parts receipts
and list the mileage and the date
of any service work performed.
See Maintenance Records on
page 11‑12.

Black plate (7,1)GMC Sierra Owner Manual - 2011
Vehicle Care 10-7
A.Engine Air Cleaner/Filter on
page 10‑19.
B. Coolant Surge Tank and Pressure Cap. See Cooling
System on page 10‑20.
C. Positive (+) Terminal. See Jump
Starting on page 10‑98.
D. Battery on page 10‑34.
E. Remote Negative (−) Terminal (Out of View). See Jump
Starting on page 10‑98.
F. Automatic Transmission Dipstick (Out of View).
See “Checking the Fluid Level”
under Automatic Transmission
Fluid (4-Speed Transmission)
on page 10‑13 orAutomatic
Transmission Fluid (6-Speed
Transmission) on page 10‑16.
G. Engine Oil Fill Cap. See “When
to Add Engine Oil” under
Engine Oil on page 10‑7. H. Engine Oil Dipstick (Out of
View). See “Checking Engine
Oil” under Engine Oil on
page 10‑7.
I. Engine Cooling Fan (Out of View). See Cooling System on
page 10‑20.
J. Power Steering Fluid Reservoir. See Power Steering Fluid on
page 10‑29.
K. Brake Master Cylinder Reservoir. See Brake Fluid on
page 10‑32.
L. Engine Compartment Fuse
Block on page 10‑50.
M. Windshield Washer Fluid Reservoir. See “Adding Washer
Fluid” under Washer Fluid on
page 10‑29.
If the vehicle has a diesel engine
and/or an Allison Transmission, see
the Duramax Diesel Supplement.Engine Oil
For diesel engine vehicles, see
“Engine Oil” in the Duramax Diesel
Supplement.
To ensure proper engine
performance and long life, careful
attention must be paid to engine
oil. Following these simple, but
important steps will help protect
your investment:
.Always use engine oil approved
to the proper specification and
of the proper viscosity grade.
See “Selecting the Right Engine
Oil” in this section.
.Check the engine oil level
regularly and maintain the
proper oil level. See “Checking
Engine Oil” and“When to Add
Engine Oil” in this section.
.Change the engine oil at the
appropriate time. See Engine
Oil Life System on page 10‑11.
.Always dispose of engine oil
properly. See “What to Do with
Used Oil” in this section.

Black plate (49,1)GMC Sierra Owner Manual - 2011
Vehicle Care 10-49
Electrical System
Electrical System
Overload
The vehicle has fuses and circuit
breakers to protect against an
electrical system overload.
When the current electrical load is
too heavy, the circuit breaker opens
and closes, protecting the circuit
until the current load returns to
normal or the problem is fixed.
This greatly reduces the chance
of circuit overload and fire caused
by electrical problems.
Fuses and circuit breakers protect
the following in the vehicle:
.Headlamp Wiring
.Windshield Wiper Motor
.Power Windows and Other
Power AccessoriesReplace a bad fuse with a new one
of the identical size and rating.
If there is a problem on the road
and a fuse needs to be replaced,
the same amperage fuse can be
borrowed. Choose some feature of
the vehicle that is not needed to use
and replace it as soon as possible.
Headlamp Wiring
An electrical overload may cause
the lamps to go on and off, or in
some cases to remain off. Have
the headlamp wiring checked right
away if the lamps go on and off or
remain off.
Windshield Wipers
If the wiper motor overheats due to
heavy snow or ice, the windshield
wipers will stop until the motor cools
and will then restart.
Although the circuit is protected
from electrical overload, overload
due to heavy snow or ice may
cause wiper linkage damage.
Always clear ice and heavy snow
from the windshield before using
the windshield wipers.
If the overload is caused by an
electrical problem and not snow or
ice, be sure to get it fixed.

Black plate (50,1)GMC Sierra Owner Manual - 2011
10-50 Vehicle Care
Fuses and Circuit
Breakers
If the vehicle is a hybrid, see
the hybrid supplement for more
information.
The wiring circuits in the 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 somefeature 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.
Engine Compartment
Fuse Block
If the vehicle has a diesel engine,
see the Duramax Diesel supplement
for more information.
If the vehicle is a hybrid, see
the hybrid supplement for more
information.
The Engine Compartment Fuse
Block is located in the engine
compartment, on the driver side
of the vehicle.
Lift the cover to access the fuse
block.
Notice: Spilling liquid on any
electrical component on the
vehicle may damage it. Always
keep the covers on any electrical
component.
To remove fuses, hold the end of
the fuse between your thumb and
index finger and pull straight out.

Black plate (51,1)GMC Sierra Owner Manual - 2011
Vehicle Care 10-51
FusesUsage
1 Right Trailer
Stop/Turn Lamp
2 Electronic
Suspension
Control, Automatic
Level Control
Exhaust Fuses
Usage
3 Left Trailer
Stop/Turn Lamp
4 Engine Controls
5 Engine Control
Module, Throttle
Control Fuses
Usage
6 Trailer Brake
Controller
7 Front Washer
8 Oxygen Sensor
9 Antilock Brakes
System 2
10 Trailer Back-up
Lamps
11 Driver Side
Low-Beam
Headlamp
12 Engine Control
Module (Battery)
13 Fuel Injectors,
Ignition Coils
(Right Side)
14 Transmission
Control Module
(Battery)
15 Vehicle Back-up
Lamps

Black plate (52,1)GMC Sierra Owner Manual - 2011
10-52 Vehicle Care
FusesUsage
16 Passenger Side
Low-Beam
Headlamp
17 Air Conditioning
Compressor
18 Oxygen Sensors
19 Transmission
Controls (Ignition)
20 Fuel Pump
21 Fuel System
Control Module
22 Not Used
23 Not Used
24 Fuel Injectors,
Ignition Coils
(Left Side)
25 Trailer Park Lamps
26 Driver Side Park
Lamps
27 Passenger Side
Park Lamps Fuses
Usage
28 Fog Lamps
29 Horn
30 Passenger Side
High-Beam
Headlamp
31 Daytime Running
Lamps (DRL)
32 Driver Side
High-Beam
Headlamp
33 Daytime Running
Lamps 2
34 Sunroof
35 Key Ignition
System, Theft
Deterrent System
36 Windshield Wiper
37 SEO B2 Upfitter
Usage (Battery)
38 Electric Adjustable
Pedals Fuses
Usage
39 Climate Controls
(Battery)
40 Airbag System
(Ignition)
41 Amplifier
42 Audio System
43 Miscellaneous
(Ignition),
Cruise Control
44 Not Used
45 Airbag System
(Battery)
46 Instrument Panel
Cluster
47 Power Take-Off
48 Auxiliary Climate
Control (Ignition)
49 Center
High-Mounted
Stoplamp (CHMSL)
50 Rear Defogger

Black plate (53,1)GMC Sierra Owner Manual - 2011
Vehicle Care 10-53
FusesUsage
51 Heated Mirrors
52 SEO B1 Upfitter
Usage (Battery)
53 Cigarette Lighter,
Auxiliary Power
Outlet
54 SEO Upfitter
Usage
55 Climate Controls
(Ignition)
56 Engine Control
Module, Secondary
Fuel Pump
(Ignition)
J-Case Fuses Usage
57 Cooling Fan 1
58 Not Used
59 Heavy Duty
Antilock Brake
System J-Case
Fuses Usage
60 Cooling Fan 2
61 Antilock Brake
System 1
62 Starter
63 Stud 2
(Trailer Brakes)
64 Left Bussed
Electrical Center 1
65 Not Used
66 Heated Windshield
Washer System
67 Transfer Case
68 Stud 1 (Trailer
Connector
Battery Power)
(Optional - 40A
Fuse Required)
69 Mid-Bussed
Electrical Center 1
70 Climate Control
Blower J-Case
Fuses Usage
71 Not Used
72 Left Bussed
Electrical Center 2
Relays Usage
FAN HI Cooling Fan High
Speed
FAN LO Cooling Fan Low
Speed
FAN CNTRL Cooling Fan
Control
HDLP
LO/HID Low-Beam
Headlamp
FOG LAMP Front Fog Lamps
A/C
CMPRSR Air Conditioning
Compressor
STRTR Starter
PWR/TRN Powertrain
FUEL PMP Fuel Pump
PRK LAMP Parking Lamps

Black plate (54,1)GMC Sierra Owner Manual - 2011
10-54 Vehicle Care
RelaysUsage
REAR
DEFOG Rear Defogger
RUN/CRNK Switched Power
Instrument Panel Fuse
Block
The instrument panel fuse block
access door is located on the driver
side edge of the instrument panel.
Pull off the cover to access the fuse
block.
The vehicle may not be equipped
with all of the fuses, relays, and
features shown. Fuses Usage
1 Rear Seats
2 Rear Accessory
Power Outlet Fuses Usage
3 Steering Wheel
Controls Backlight
4 Driver Door Module
5 Dome Lamps, Driver
Side Turn Signal