2005 GMC SIERRA low beam

A. Low-Beam Headlamp
B. High-Beam Headlamp
2. Pull the headlamp assembly out.
3. Unplug the electrical connector.
4. Turn the old bulb counterclockwise and remove it
from the headlamp assembly.
5. Put the new bulb into the assembly and turn it
clockwise until it is tight. Use care not to touch
the bulb with your ngers or hands.
6. Plug in the electrical connector.
7. Put the headlamp assembly back into the vehicle.
8. Install and tighten the two pins. If your vehicle
has one pin, install it and turn it into the locking
feature.
Front Turn Signal, Sidemarker and
Daytime Running Lamps
A. Sidemarker Lamp
B. Retainer Clip
C. Front Turn Signal Lamp
D. Daytime Running Lamp (DRL)
To replace a front turn signal, sidemarker or DRL bulb,
do the following:
1. Remove the headlamp assembly as described
previously. SeeHeadlamps on page 5-63for
more information.
5-64

Taillamps (Chassis Cab Models)
A. Turn Signal Lamp
B. Stoplamp
C. Back-up Lamp
To replace a taillamp bulb for chassis cab models, do
the following:
1. Peel the rubber seal away from the lens using
your hands.
2. Lift the lens off the lamp assembly.
3. Pull the old bulb straight out from the socket.
4. Put a new bulb into the socket and press it in until it
is tight.
5. Reinstall the lens and the lens seal.
Replacement Bulbs
Exterior Lamp Bulb Number
Back-up Lamp 3157
Back-up Lamp* 1156
Cargo Lamp 912
Center High-Mounted Stoplamp
(CHMSL)912
Daytime Running Lamps (DRL) 4114K
Fender Marker Lamps 194
Front Parking and Turn Lamp 3457A
Front Roof Marker Lamps 194
Headlamps
High-Beam 9005
Low-Beam 9006
Rear Marker Lamp, Taillamp and
Stoplamp*3157
Rear Turn Signal Lamp 3157
Rear Turn Signal Lamp* 1156
Sidemarker Lamp (If Equipped) 194
Stoplamp and Taillamp* 1157
* Chassis Cab Models
For replacement bulbs not listed here, contact
your dealer.
5-71

Fuses Usage
AUX PWRAuxiliary Power
Outlet — Console
IGN 1 Ignition Relay
PCM 1 Powertrain Control Module
ETC/ECMElectronic Throttle Control,
Electronic Brake Controller
IGN EInstrument Panel Cluster, Air
Conditioning Relay, Turn
Signal/Hazard Switch, Starter
Relay
RTD Ride Control
TRL B/U Backup Lamps Trailer Wiring
PCM BPowertrain Control Module,
Fuel Pump
F/PMP Fuel Pump (Relay)
B/U LPBack-up Lamps, Automatic
Transmission Shift Lock
Control System
RR DEFOG Rear Window Defogger
HDLP-HI Headlamp High Beam Relay
PRIME Not Used
02B Oxygen Sensors
AIRBAGSupplemental Inatable
Restraint System
FRT PARKFront Parking Lamps,
Sidemarker LampsFuses Usage
DRLDaytime Running Lamps
(Relay)
SEO IGN Rear Defog Relay
TBC IGN1 Truck Body Controller Ignition
HI HDLP-LT High Beam Headlamp-Left
LH HID Not Used
DRL Daytime Running Lamps
RVC Regulated Voltage Control
IPC/DICInstrument Panel
Cluster/Driver Information
Center
HVAC/ECAS Climate Control Controller
CIG LTR Cigarette Lighter
HI HDLP-RT High Beam Headlamp-Right
HDLP-LOW Headlamp Low Beam Relay
A/C COMP Air Conditioning Compressor
A/C COMPAir Conditioning Compressor
Relay
RR WPR Not Used
RADIO Audio System
SEO B1Mid Bussed Electrical Center,
Rear Heated Seats,
HomeLink
LO HDLP-LT Headlamp Low Beam-Left
5-128

Fuses Usage
BTSIBrake Transmission Shift
Interlock System
CRNK Starting System
LO HDLP-RT Headlamp Low Beam-Right
FOG LP Fog Lamp Relay
FOG LP Fog Lamps
HORN Horn Relay
W/S WASHWindshield Washer Pump
Relay
W/S WASH Windshield Washer Pump
INFOOnStar
®/Rear Seat
Entertainment
RADIO AMP Radio Amplier
RH HID Not Used
HORN Horn
EAP Not Used
TREC All-Wheel Drive Module
SBA Supplemental Brake Assist
Auxiliary Electric Cooling Fan
Fuse Block
The auxiliary electric
cooling fan fuse block is
located in the engine
compartment on the
driver’s side of the vehicle
next to the underhood
fuse block.
Lift the cover for access to the fuse/relay block.
Fuses Usage
COOL/FAN Cooling Fan
COOL/FAN Cooling Fan Relay Fuse
COOL/FAN Cooling Fan Fuse
Relays Usage
COOL/FAN 1 Cooling Fan Relay 1
COOL/FAN 3 Cooling Fan Relay 3
COOL/FAN 2 Cooling Fan Relay 2
5-129

Fuel (cont.)
Gasoline Specications.................................. 5-7
Low Warning Light.......................................3-50
Fuses
Center Instrument Panel Fuse Block.............5-124
Fuses and Circuit Breakers.........................5-122
Instrument Panel Fuse Block.......................5-122
Underhood Fuse Block...............................5-125
Windshield Wiper.......................................5-121
G
Gage
Engine Coolant Temperature.........................3-42
Fuel..........................................................3-49
Oil Pressure...............................................3-47
Speedometer..............................................3-33
Tachometer.................................................3-33
Transmission Temperature.............................3-43
Voltmeter Gage...........................................3-38
Garage Door Opener.......................................2-66
Gasoline
Octane........................................................ 5-6
Specications............................................... 5-7
Glove Box.....................................................2-70
GM Mobility Reimbursement Program.................. 7-5
H
Hazard Warning Flashers................................... 3-6
Head Restraints............................................... 1-8
Headlamps............................................3-13, 5-63
Automatic Headlamp System.........................3-15
Bulb Replacement.......................................5-62
Daytime Running Lamps...............................3-14
Flash-to-Pass............................................... 3-9
Front Turn Signal, Sidemarker and
Daytime Running Lamps...........................5-64
Halogen Bulbs............................................5-62
High/Low Beam Changer................................ 3-9
On Reminder..............................................3-14
Pickup Box Identication and Fender
Marker Lamps.........................................5-69
Roof Marker Lamps.....................................5-65
Heated Seats................................................... 1-5
Heater...................................................3-21, 3-22
Heater...........................................................3-25
Highbeam On Light.........................................3-48
Highway Hypnosis...........................................4-42
Hill and Mountain Roads..................................4-42
HomeLink
®Transmitter....................................2-66
HomeLink®Transmitter, Programming................2-67
Hood
Checking Things Under................................5-12
Release.....................................................5-13
6

Horn............................................................... 3-6
How to Use This Manual...................................... ii
How to Wear Safety Belts Properly...................1-16
Hydraulic Clutch.............................................5-34
I
Ignition Positions.............................................2-22
Infants and Young Children, Restraints...............1-35
Ination -- Tire Pressure..................................5-79
Instrument Panel
Brightness..................................................3-17
Cluster.......................................................3-32
Overview..................................................... 3-4
J
Jump Starting.................................................5-53
K
Keyless Entry System....................................... 2-4
Keys............................................................... 2-3
L
Labelling, Tire Sidewall....................................5-74
Lamps
Auxiliary Roof Mounted Lamp........................3-17
Cargo........................................................3-19
Dome........................................................3-17
Dome Lamp Override...................................3-18
Fog ...........................................................3-16
Front Reading.............................................3-18
LATCH System
Child Restraints...........................................1-47
Securing a Child Restraint Designed
for the LATCH System..............................1-49
Latches, Seatback............................................ 1-8
Light
Airbag Off..................................................3-34
Airbag Readiness........................................3-34
Anti-Lock Brake System Warning...................3-41
Battery Warning..........................................3-38
Brake System Warning.................................3-39
Cruise Control.............................................3-48
Four-Wheel-Drive.........................................3-48
Highbeam On.............................................3-48
Low Fuel Warning.......................................3-50
Malfunction Indicator....................................3-44
Passenger Airbag Status Indicator..................3-36
Safety Belt Reminder...................................3-33
Security.....................................................3-48
Tow/Haul Mode...........................................3-49
7