brake light GMC SIERRA 2010 Owner's Guide

Maintenance When Trailer Towing
The vehicle needs service more often when pulling a
trailer. See this manual's Maintenance Schedule or
Index for more information. Things that are especially
important in trailer operation are automatic transmission
fluid, engine oil, axle lubricant, belts, cooling system
and brake system. It is a good idea to inspect these
before and during the trip.
Check periodically to see that all hitch nuts and bolts
are tight.
Trailer Wiring Harness
The vehicle is equipped with one of the following wiring
harnesses for towing a trailer or hauling a slide-in
camper.
Basic Trailer Wiring
All regular, extended cab and crew cab pickups have a
seven‐wire trailer towing harness.
For vehicles not equipped with heavy duty trailering, the
harness is secured to the vehicle's frame behind the
spare tire mount. The harness requires the installation
of a trailer connector, which is available through your
dealer/retailer.
If towing a light‐duty trailer with a standard four‐way
round pin connector, an adapter is available from your
dealer/retailer.
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*
5-74

*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/
retailer 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/retailer 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.Camper/Fifth-Wheel Trailer Wiring Package
The seven-wire camper harness is located under the
front edge of the pickup box on the drivers side of the
vehicle, attached to the frame bracket. A connector
must be added to the wiring harness which connects to
the camper.
The harness contains the following camper/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
5-75

If the vehicle is equipped with the“Heavy-Duty
Trailering” option, please refer to “Heavy-Duty Trailer
Wiring Package” earlier in this section.
When the camper-wiring harness is ordered without the
heavy-duty trailering package, an eight-wire harness
with a seven-pin connector is located at the rear of the
vehicle and is tied to the vehicle's frame.
Electric Brake Control Wiring
Provisions
These wiring provisions are included with the vehicle as
part of the trailer wiring package. These provisions are
for an electric brake controller. The instrument panel
contains blunt cut wires behind the steering column for
the trailer brake controller. The harness contains the
following wires:
.Dark Blue: Brake Signal to Trailer Connector
.Red/Black: Battery
.Light Blue/White: Brake Switch
.White: Ground
It should be installed by your dealer/retailer or a
qualified service center.
If the vehicle is equipped with an ITBC, the blunt cuts
exist, but are not connected further in the harness. If an
aftermarket trailer brake controller is installed, the ITBC
must be disconnected. Do not power both ITBC and
aftermarket controllers to control the trailer brakes at the
same time.
5-76

{WARNING:
With the wrong kind of fluid in the brake hydraulic
system, the brakes might not work well. This could
cause a crash. Always use the proper brake fluid.
Notice:
.Using the wrong fluid can badly damage
brake hydraulic system parts. For example,
just a few drops of mineral-based oil, such
as engine oil, in the brake hydraulic system
can damage brake hydraulic system parts
so badly that they will have to be replaced.
Do not let someone put in the wrong kind
of fluid.
.If brake fluid is spilled on the vehicle's
painted surfaces, the paint finish can be
damaged. Be careful not to spill brake
fluid on the vehicle. If you do, wash it off
immediately. See Washing Your Vehicle
on
page 6‑113
.
Brake Wear
This vehicle has front disc brakes and could have rear
drum brakes or rear disc brakes.
Disc brake pads have built-in wear indicators that make
a high-pitched warning sound when the brake pads are
worn and new pads are needed. The sound can come
and go or be heard all the time the vehicle is moving,
except when applying the brake pedal firmly.
{WARNING:
The brake wear warning sound means that soon
the brakes will not work well. That could lead to
an accident. When the brake wear warning sound
is heard, have the vehicle serviced.
Notice: Continuing to drive with worn-out brake
pads could result in costly brake repair.
Some driving conditions or climates can cause a brake
squeal when the brakes are first applied or lightly
applied. This does not mean something is wrong with
the brakes.
6-41

To avoid the possibility of the vehicles rolling, set
the parking brake firmly on both vehicles involved
in the jump start procedure. Put the automatic
transmission in P (Park) or a manual transmission
in Neutral before setting the parking brake. If you
have a four-wheel-drive vehicle, be sure the
transfer case is in a drive gear, not in Neutral.
Notice: If you leave the radio or other accessories
on during the jump starting procedure, they could
be damaged. The repairs would not be covered by
the warranty. Always turn off the radio and other
accessories when jump starting the vehicle.
4. Turn off the ignition on both vehicles. Unplug unnecessary accessories plugged into the
cigarette lighter or the accessory power outlets.
Turn off the radio and all the lamps that are not
needed. This will avoid sparks and help save
both batteries. And it could save the radio!
5. Open the hood on the other vehicle and locate the positive (+) and negative (−) terminal locations on
that vehicle.
The positive (+) terminal, is located under a
red plastic cover at the positive battery post.
To uncover the positive (+) terminal, open the
red plastic cover.
The remote negative (−) terminal is a stud located
on the right front passenger side of the engine,
where the negative battery cable attaches. See
Engine Compartment Overview on page 6‑16.
6-45

FusesUsage
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
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
Fuses Usage
23 Not Used
24Fuel Injectors, Ignition
Coils (Left Side)
25 Trailer Park Lamps
26 Driver Side Park Lamps
27 Passenger Side Park Lamps
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 Lights 2
34 Sunroof
35 Key Ignition System, Theft
Deterrent System
36 Windshield Wiper
37 SEO B2 Upfitter Usage (Battery)
6-123

FusesUsage
38 Electric Adjustable Pedals
39 Climate Controls (Battery)
40 Airbag System (Ignition)
41 Amplifier
42 Audio System
43Miscellaneous (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
Fuses Usage
51 Heated Mirrors
52 SEO B1 Upfitter Usage (Battery)
53Cigarette 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
60 Cooling Fan 2
61 Antilock Brake System 1
6-124

A
Accessories and Modifications . . . . . . . . . . . . . . . . . . . . . . .6-4
Accessory Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23
Accessory Power Outlets . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Active Fuel Management™. . . . . . . . . . . . . . . . . . . . . . . . 3-27
Add-On Electrical Equipment . . . . . . . . . . . . . . . . . . . . . 6-117
Adding a Snow Plow or Similar Equipment . . . . . . . . 5-36
Additives, Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8
Adjustable Throttle and Brake Pedal . . . . . . . . . . . . . . . 3-26
Air Cleaner/Filter, Engine . . . . . . . . . . . . . . . . . . . . . . . . . . 6-21
Air Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18, 4-20
Airbag Adding Equipment to Your Airbag-EquippedVehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-91
Airbag System Airbag Off Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-82
How Does an Airbag Restrain? . . . . . . . . . . . . . . . . . . . 2-79
Passenger Sensing System . . . . . . . . . . . . . . . . . . . . . . 2-85
Servicing Your Airbag-Equipped Vehicle . . . . . . . . . . 2-91
What Makes an Airbag Inflate? . . . . . . . . . . . . . . . . . . . 2-79
What Will You See After an Airbag Inflates? . . . . . . 2-80
When Should an Airbag Inflate? . . . . . . . . . . . . . . . . . . 2-78
Where Are the Airbags? . . . . . . . . . . . . . . . . . . . . . . . . . . 2-75 Airbags
Off Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34
Passenger Status Indicator . . . . . . . . . . . . . . . . . . . . . . . 4-36
Readiness Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-33
System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-73
Antenna Fixed Mast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-149
Antenna, XM™ Satellite Radio Antenna
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-149
Antilock Brake System (ABS) . . . . . . . . . . . . . . . . . . . . . . . .5-4 Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-40
Appearance Care Aluminum or Chrome-Plated Wheels . . . . . . . . . . . . 6-115
Care of Safety Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-112
Chemical Paint Spotting . . . . . . . . . . . . . . . . . . . . . . . . . 6-116
Cleaning Exterior Lamps/Lenses . . . . . . . . . . . . . . . . 6-113
Fabric/Carpet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-111
Finish Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-114
Finish Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-116
Instrument Panel, Vinyl, and Other PlasticSurfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-112
Interior Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-110
Leather . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-112
i - 1

Appearance Care (cont.)Sheet Metal Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-116
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-116
Underbody Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 6-116
Washing Your Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-113
Weatherstrips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-113
Windshield and Wiper Blades . . . . . . . . . . . . . . . . . . . . 6-114
Ashtray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Assistance Program, Roadside . . . . . . . . . . . . . . . . . . . . . .8-7
Audio System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-84 Audio Steering Wheel Controls . . . . . . . . . . . . . . . . . .4-145
Navigation/Radio System, see NavigationManual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-123
Radio Reception . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-148
Rear Seat (RSA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-143
Setting the Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-84
Theft-Deterrent Feature . . . . . . . . . . . . . . . . . . . . . . . . . .4-145
XM™ Satellite Radio Antenna System . . . . . . . . . . .4-149
Audio System(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-87
Automatic Headlamp System . . . . . . . . . . . . . . . . . . . . . . 4-12
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-23, 6-26
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28
Auxiliary Roof Mounted Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Axle, Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-48B
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-43 Electric Power Management . . . . . . . . . . . . . . . . . . . . . . 4-16
Run-Down Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Belt Routing, Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-16
Bluetooth
®. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-123
Brake
Emergencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Pedal and Adjustable Throttle . . . . . . . . . . . . . . . . . . . . 3-26
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-39 Antilock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Parking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-50
System Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-39
Braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
Braking in Emergencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-5
Break-In, New Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21
Bulb Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-62 Center High-Mounted Stoplamp (CHMSL) andCargo Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-58
Fog Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Halogen Bulbs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-57
Headlamp Aiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-54
Headlamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-57
i - 2

Headlamps (cont.)Exterior Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
High/Low Beam Changer . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
On Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Pickup Box Identification and Fender Marker
Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-59
Heated Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8
Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18, 4-20 Engine Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26
High-Speed Operation, Tires . . . . . . . . . . . . . . . . . . . . . . 6-74
Highbeam On Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-48
Highway Hypnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-24
Hill and Mountain Roads . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-25
Hood Checking Things Under . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14
Release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
How to Wear Safety Belts Properly . . . . . . . . . . . . . . . . 2-21
I
Ignition Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
Infants and Young Children, Restraints . . . . . . . . . . . . 2-42
Inflation - Tire Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-72 Instrument Panel
Brightness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Storage Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-76
Instrument Panel Cluster . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30
Integrated Trailer Brake Control System (ITBC) . . . . 5-50
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-2
J
Jump Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-44
K
Keyless Entry Remote (RKE) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Keyless Entry System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
L
Labeling, Tire Sidewall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-65
Lamps Auxiliary Roof Mounted Lamp . . . . . . . . . . . . . . . . . . . . 4-14
Cargo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Daytime Running (DRL) . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
i - 8