2005 ELECTRCAL Fuses & Circuit Breakers - Sierra & Silverado

Fuses & Circuit Breakers - Sierra & Silverado

IDENTIFICATION

FUSIBLE LINKS

For information on fusible links and repairing them, refer to illustration. See Fig. 1.

CAUTION: When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See appropriate COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery.

2005 ELECTRCAL Fuses & Circuit Breakers - Sierra & Silverado


Fig. 1: Repairing Fusible Links Courtesy of GENERAL MOTORS CORP.

INSTRUMENT PANEL FUSE BLOCK

NOTE: Instrument Panel (I/P) fuse block (left) is located at the left side of the I/P behind the access panel. See Fig. 2.


Fig. 2: Locating Left Instrument Panel Fuse Block Courtesy of GENERAL MOTORS CORP.


Fig. 3: Identifying Left Instrument Panel Fuse Block Components Courtesy of GENERAL MOTORS CORP.

Fuse Block - I/P Device Rating Description

RR WPR Fuse 15A Not UsedSEO ACCY Fuse 10A Upfitter ProvisionsWS WPR Fuse 25A Windshield Wiper Motor and ModuleTBC ACCY Fuse 10A Body Control Module (BCM)IGN 3 Fuse 10A Rear Wheel Steering Control Module

4WD Fuse 15A Front Axle Actuator, Transfer Case Shift Control Switch, Auxiliary Battery Relay

HTR A/C Fuse 30A HVAC Control ModuleLOCK Relay - Door Lock ActuatorsHVAC 1 Fuse 10A HVAC Control Module, HVAC Actuators

L DOOR - 12-WAY - BLACK - Fuse Block - Left I/P C3 (Driver Door Harness)

CRUISE Fuse 10ACruise Control Switch, Cruise Control Module, Steering Wheel Speed/Position Sensor, Power Take-Off (PTO) Switch

UNLOCK Relay - Door Unlock ActuatorsRR FOG LP Relay - Fog Lamp - LR, Fog Lamp - RR (Export)

BRAKE Fuse 10A Stop Lamp Switch, Electronic Brake Control Module (EBCM), Clutch Start


INSTRUMENT PANEL RELAY BLOCK

SwitchDRIVER UNLOCK Relay - Door Latch Assembly-Driver (Base)

IGN O Fuse 10A

Passlock Sensor, Automatic Transmission, Powertrain Control Module (PCM) - Gas, Engine Control Module (ECM) - Diesel

TBC IGN O Fuse 10A Body Control Module (BCM)

VEH CHMSL Fuse 10ACenter High Mounted Stop Lamp (CHMSL)

LT TRLR ST/TRN Fuse 10A Trailer Wiring Provisions

LT TRN Fuse 10ATurn Signal Lamps - Left, Marker Lamps - Left, Driver Door Module (DDM), Instrument Panel Cluster (IPC)

VEH STOP Fuse 15ATail/Stop and Turn Signal Lamps-Rear, Throttle Actuator Control (TAC)

BODY - 12-WAY - BROWN - Fuse Block - Left I/P C4 (Body Harness)RT TRLR ST/TRN Fuse 10A Trailer Wiring Provisions

RT TRN Fuse 10A

Turn Signal Lamps - Right, Marker Lamps - Right, Front Passenger Door Module (FPDM), Instrument Panel Cluster (IPC)

DDM Fuse 15A Driver Door Module (DDM)

AUX PWR 2 Fuse 20AI/P Accessory Power Outlets, Accessory Power Outlet - Rear

LOCKS Fuse 20A Door Lock/Unlock RelaysECC Fuse 10A Not UsedTBC 2C Fuse 15A Body Control Module (BCM)FLASH Fuse 25A Turn Signal/Hazard Flasher Module

CB - LT DOORS 25A Window Switch - LR, Driver Door Module (DDM)

TBC 2B Fuse 15A Body Control Module (BCM)TBC 2A Fuse 15A Body Control Module (BCM)

NOTE: Instrument panel relay block is located below instrument panel to the left of the steering column.


Fig. 4: Instrument Panel Relay Block

Relay Block I/P

MOBILE RADIO FUSE BLOCK

Device Rating DescriptionSEO - 6-WAY - BLK - Mobile Radio and Emergency LightingTRAILER - 6-WAY - BRN - Trailer ProvisionsUPFIT - 4-WAY - CRM - Upfitter ProvisionsSL RIDE - 6-WAY - GRY - Manual Selectable Ride (MSR)

HDLNR 2 - 6-WAY - CRM -Air Temperature Assembly - Inside, Blower Motor Control Processor, HVAC Actuators, Inside Rearview Mirror

BODY - 12-WAY - WHT -

Door Courtesy Lamps, Driver/Passenger Seat Modules, Heated Seat Module - LR/RR, Rear Window Defogger Grid, Automatic Occupant Sensing

DEFOG Relay (C49) - Rear Window Defogger Grid

HDLNR 1 - 6-WAY - BRN -Courtesy Reading Lamps, Garage Door Opener, Inside Rearview Mirror, Vanity Mirror Lamps

SPARE Relay - Not UsedCB - SEAT 30A Driver/Passenger Seat Modules

CB - RT - DOOR 25AFront Passenger Door Module (FPDM), Window Switch - RR

SPARE - 4-WAY - GRY - Not Used

INFO - 12-WAY - BLK -Rear Seat Audio (RSA) Module, OnStar Module, Audio Amplifier (Bose)


Fig. 5: Identifying Mobile Radio Fuse Block Components Courtesy of GENERAL MOTORS CORP.

NOTE: Mobile Radio fuse block is located at the right side of the instrument panel behind the instrument panel compartment.


Fig. 6: Right Instrument Panel Fuse Block Legend Courtesy of GENERAL MOTORS CORP.


UNDERHOOD FUSE BLOCK

Fig. 7: Locating Underhood Fuse Block Courtesy of GENERAL MOTORS CORP.

NOTE: Underhood fuse block is located at the left side of the engine compartment to the rear of the battery. See Fig. 7.


Fig. 8: Identifying Underhood Fuse Block Components Courtesy of GENERAL MOTORS CORP.

Fuse Block - Underhood Device Rating Description

STUD 1 Fuse -

Trailer Wiring, Auxiliary Battery Relay and Battery Right (TP2), AUX HTR PMP Fuse (HP2), ESCM Fuse (HP2), HCM-B Fuse (HP2) and TRANS PUMP Fuse (HP2)

MBEC 1 Fuse 50A SEAT CB, RT DOOR CBBLWR Fuse 40A Blower Motor

LBEC 2 Fuse 50ALOCKS Fuse, DDM Fuse, PDM Fuse, ECC Fuse, AUX PWR 2 Fuse

STUD 2 Fuse 30A Trailer Wiring, Emergency Vehicle Roof Lamp RelayABS Fuse 60A Electronic Brake Control Module (EBCM)VSES/ECAS Fuse 60A Not Used

IGN A Fuse 40A Ignition Switch RUN, START, RUN/START/ACCY, STARTER Relay


IGN B Fuse 40A Ignition Switch RUN/ACC, RUN/START

LBEC 1 Fuse 50AFLASH Fuse, TBC 2A Fuse, TBC 2B Fuse, TBC 2C Fuse, LT DOORS Fuse

TRL PARK Fuse 15A Trailer WiringRR PARK Fuse 10A Exterior Lamps-Right Rear, Clearance Lamps-RightLR PARK Fuse 10A Exterior Lamps-Left Rear, Clearance Lamps-Left

PARK LP Relay -TRL PARK Fuse, LR PARK Fuse, RR PARK Fuse, FRT PARK Fuse, INT PARK Fuse DRL Relay (Export)

STRTR Relay - Starter

INTPARK Fuse 10APower Take-Off (PTO) Switch, Inflatable Restraint I/P Module Disable Switch

STOP LP Fuse 25A Stop Lamp SwitchTBC BATT Fuse 10A Body Control Module (BCM), PASS-Key ModuleS/ROOF Fuse 25A Sunroof Module ControlSEO B2 Fuse 30A Roof Beacon Relay

4WS Fuse 15ARear Wheel Steering Control Module, Evaporative Emission (EVAP) Canister Vent Solenoid

RR HVAC 30A Not UsedAUX PWR Fuse 20A Accessory Power Outlets, Auxiliary Power Outlets

PCM 1 Fuse 15A

Powertrain Control Module (PCM), Mass Air Flow (MAF) Sensor, Evaporative Emission (EVAP) Canister Purge Solenoid, Fuel Composition Sensor, Secondary Fuel Pump Relay

ETC/ECM Fuse 15A Throttle Actuator Control (TAC)

INJ 1 Fuse (Gas)/ECMRPCV Fuse (Diesel) #2

15AFuel Injectors-Odd-Numbered, Ignition Coils-Odd-Numbered (Gas)

15A Engine Control Module (ECM) (Diesel)

INJ 2 Fuse (Gas)/EDU Fuse (Diesel) #1

15AFuel Injectors-Even-Numbered, Ignition Coils-Even-Numbered (Gas)

25A Fuel Injector Control Module (FICM) (Diesel)

IGN E Fuse 10AA/C COMP Relay, Park/Neutral Position (PNP) Switch, Turn Signal/Multifunction Switch, Headlamp Leveling Components, Clutch Start Switch

IGN 1 Relay (Gas)/EDU Relay (Diesel) #5

-SBA Fuse, ETC/ECM Fuse, PCM 1 Fuse, INJ 1 Fuse, INJ 2 Fuse

- ECMRPCV Fuse, EDU Fuse (Diesel)RTD Fuse 30A Not Used

TRL B/U Fuse 10ABody Control Module (BCM), Trailer Wiring, Back-Up Alarm

PCM B Fuse 20A Powertrain Control Module, F/PMP RelayF/PMP Relay - Fuel Pump

O2 A Fuse (Gas)/FUEL HT 15A Heated Oxygen Sensors-Upstream (Gas)


Fuse (Diesel) #315A

Fuel Heater, Glow Plug Controller, Intake Air (IA) Heater Relay, EGR System Components (Diesel)

B/U LP Fuse 20A Park/Neutral Position (PNP) SwitchRR DEFOG Fuse 30A DEFOG RelayHDLP-HI Relay - HI HDLP-LT Fuse, HI HDLP-RT Fuse

O2 B Fuse (Gas)/EMCI Fuse (Diesel) #4

15A Heated Oxygen Sensors-Downstream (Gas)

15A IAT/MAF Sensor, Engine Control Module (ECM) (Diesel)

AIRBAG Fuse 15AInflatable Restraint Sensing and Diagnostic Module (SDM), Memory Seat Module-Passenger, Inside Rearview Mirror

FRT PARK Fuse 10A Park/Turn Signal Lamps-Front, Marker Lamps-Front

DRL Relay - DRL Lamp-LT, DRL Lamp-RT (Domestic)/DRL Fuse, FRT PARK Fuse (Export)

SEO IGN Fuse 10A DEFOG Relay, Instrument Panel Cluster (IPC)TBC IGN 1 Fuse 10A Body Control Module (BCM)HI HDLP-LT Fuse 10A Headlamp-High Beam-LeftLH HID Fuse 20A High Intensity Discharge Lamps

DRL Fuse 10ADRL Relay (Domestic)/Daytime Running Lamps (Export)

RVC Fuse 10A Generator Battery Control ModuleIPC/DIC Fuse 10A Instrument Panel Cluster (IPC)HVAC/ECAS Fuse 10A HVAC Control ModuleCIG LTR Fuse 15A Cigar Lighter, Data Link Connector (DLC)HI HDLP RT Fuse 10A Highbeam Headlamp-RightHDLP-LOW Relay - LO HDLP-LT Fuse, LO HDLP-RT FuseA/C COMP Relay - A/C Compressor ClutchA/C COMP Fuse 10A A/C Compressor Clutch RelayRR WPR 25A Not UsedRADIO Fuse 15A Radio, Rear Seat Audio (RSA)

SEO B1 Fuse 15AInstrument Panel Cluster (IPC), Rear Fog Lamp Relay, Overhead Console, Roof Beacon Switch

LO HDLP-LT Fuse 10A Headlamp-Low Beam-LeftBTSI Fuse 10A Stop Lamp Switch

CRNK Fuse 10APowertrain Control Module (PCM)-Gas, Engine Control Module (ECM)-Diesel

LO HDLP-RT Fuse 25A Headlamp-Low Beam-RightFOG LP Relay - Fog Lamp-RF, Fog Lamp-LFFOG LP Fuse 15A FOG LP RelayHORN Relay - HORN FuseW/S WASH Relay - Windshield Washer Fluid PumpW/S WASH Fuse 15A W/S WASH Relay


UNDERHOOD COOLING FAN FUSE BLOCK (10 SERIES)

INFO Fuse 15AVehicle Communication Interface Module (VCIM), Rear Seat Entertainment (RSE) Assembly, Remote Playback Device-CD Player

RADIO AMP Fuse 30A Audio AmplifierRH HID Fuse 20A Not UsedHORN Fuse 15A Horn-Left, Horn-RightEAP Fuse 15A Not Used

TREC Fuse 30ATransfer Case Encoder Motor, Transfer Case Shift Control Module

SBA Fuse 15A Supplemental Brake Assist (SBA)

NOTE: Underhood cooling fan fuse block is located on left side of engine compartment to the rear of the battery.


Fig. 9: Identifying Underhood Cooling Fan FuseBlock Components Courtesy of GENERAL MOTORS CORP.

Fuse Block - Underhood - Cooling Fan (10 Series) Device Rating Description

Cool/Fan Fuse 40A Cool/Fan 1 RelayCool/Fan Fuse 40A Cool/Fan 2 RelayCool/Fan Fuse 10A Cool/Fan 3 RelayCool/Fan 1 Relay - Cooling Fan - LeftCool/Fan 2 Relay - Cooling Fan - Left and Right High SpeedCool/Fan 3 Relay - Cooling Fan - Left and Right Low Speed


Documents

2005 ELECTRCAL Fuses & Circuit Breakers - Sierra & Silverado