GM Service Manual Online
For 1990-2009 cars only
Table 1: Fuse Block - Underhood Label Usage
Table 2: Fuse Block - Underhood C1
Table 3: Fuse Block - Underhood C2
Table 4: Fuse Block - Underhood C3
Table 5: Fuse Block - Underhood C4
Table 6: Fuse Block - Underhood C5
Table 7: Fuse Block - Underhood C6
Table 8: Fuse Block - Underhood C7
Table 9: Fuse Block - Underhood C9
Table 10: Fuse Block - I/P C1
Table 11: Fuse Block - I/P C2
Table 12: Fuse Block - I/P C3
Table 13: Fuse Block - I/P C4
Table 14: Relay Block - I/P Label Usage
Table 15: Relay Block - I/P C1
Table 16: Relay Block - I/P C3
Table 17: Relay Block - I/P C4
Table 18: Relay Block - I/P C7 (H.D. Trailer Wiring)
Table 19: Relay Block - I/P C7 (Off Road Lighting)
Table 20: Relay Block - I/P C10
Table 21: Junction Block - I/P C1 Wire Entry
Table 22: Junction Block - I/P C2
Table 23: Junction Block - I/P C4
Table 24: Junction Block -- I/P C5
Table 25: Junction Block - I/P C6
Table 26: Junction Block - I/P C7
Table 27: Junction Block - I/P C8

Fuse Block - Underhood Label


Object Number: 997050  Size: LF

Fuse Block - Underhood Label Usage

Fuse

Rating

Description

STUD 1 Fuse

40A

Trailer Wiring

MBEC Fuse

50A

SEAT CB, RT DOOR CB

BLOWER Fuse

40A

HVAC Blower Motor - High Speed

LBEC 2 Fuse

50A

LOCKS Fuse, DDM Fuse, PDM Fuse, AUX PWR 2 Fuse

STUD 2 Fuse

30A

Trailer Wiring, Off Road Lamps

ABS Fuse

60A

Electronic Brake Control Module (EBCM)

VSES/ECAS Fuse

60A

ECAS Relay

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

50A

FLASH Fuse, TBC 2A Fuse, TBC 2B Fuse, TBC 2C Fuse, LT DOORS Fuse

TRL PARK Fuse

15A

Trailer Wiring

RR PARK Fuse

10A

Tail/Stop Lamp - Right, License Lamp - Right, Side Marker Lamp - Right Rear

LR PARK Fuse

10A

Tail/Stop Lamp - Left, License Lamp - Left, Side Marker Lamp - Left Rear

INT PARK RF Fuse

10A

SIR Defeat Switch, Clearance Lamps, Marker Lamps, Trailer Jumper

STOP LP Fuse

25A

Stop Lamp Switch

TBC BATT Fuse

10A

BCM

PARK LP Relay

--

TRLR PARK Fuse, LR PARK Fuse, RR PARK Fuse, F PARK Fuse, MARKER LP Fuse

STARTER Relay

--

Starter

SUNROOF Fuse

25A

Sunroof Relay

SEO B2 Fuse

30A

Electronic Brake Control Module (EBCM)

4WS Fuse

15A

EVAP Canister Vent Solenoid

RR HVAC

30A

Rear HVAC Module - w/C69

AUX PWR 1 Fuse

20A

Accessory Outlets - Console

PCM 1 Fuse

15A

Evaporative Emission (EVAP) Canister Purge Solenoid, Powertrain Control Module (PCM), Mass Air Flow (MAF) Sensor/Intake Air Temperature (IAT) Sensor

ETC/ECM Fuse

15A

Throttle Actuator Control (TAC), Electronic Brake Control Module (EBCM)

INJ 1 Fuse

15A

Odd Ignition Coils, Odd Fuel Injectors

INJ 2 Fuse

15A

Even Ignition Coils, Even Fuel Injectors

IGN E Fuse

10A

A/C Compressor Relay, I/P Cluster, Turn/Hazard Switch

RTD Fuse

30A

Not Used

TRL B/U Fuse

10A

BCM Module, Trailer Connector

PCM B Fuse

20A

Fuel Pump Relay, PCM

F/PMP Relay

--

Fuel Pump

O2 Sensor A Fuse

15A

Heated Oxygen Sensors - Left/Right -- Before Catalytic Converter

B/U LP Fuse

20A

Park/Neutral Position Switch (PNP)

RR DEFOG Fuse

30A

DEFOG Relay

HDLP-HI Relay

--

High Beam - Left, High Beam - Right

O2 B Fuse

15A

Heated Oxygen Sensors - Left/Right -- After Catalytic Converter

SIR Fuse

15A

Inflatable Restraint I/P Module Disable Switch, Inflatable Restraint Sensing and Diagnostic Module (SDM)

FRT PARK Fuse

10A

LF/RF Park/Turn Lamps, LF/RF Side Marker Lamps

SEO IGN Fuse

10A

Rear Defogger Relay

TBC IGN 1 Fuse

10A

Body Control Module (BCM)

HI HDLP - LT Fuse

10A

Headlamp - High Beam - Left

LH HID Fuse

20A

Not Used

DRL Relay

--

DRL - Left, DRL - Right

DRL Fuse

10A

Daytime Running Lamps (DRL) Relay

IPC/DIC Fuse

10A

Instrument Panel Cluster (IPC)

HVAC/ECAS Fuse

10A

HVAC Control Module, Air Suspension Module

CIG LTR Fuse

15A

Cigar Lighter, Data Link Connector (DLC)

HI HDLP RT Fuse

10A

Highbeam Headlamp - Right

HDLP-LOW Relay

--

Headlamp - Low Beam - Left, Headlamp - Low Beam - Right

A/C COMP Relay

--

A/C Compressor Clutch Assembly

A/C COMP Fuse

10A

A/C Compressor Clutch Relay

RR WPR

25A

Rear Window Wiper Motor

RADIO Fuse

15A

Radio, Rear Seat Audio (RSA)

SEO B1 Fuse

15A

Heated Seat Module - LR/RR, Garage Door Opener

LO HDLP - LT Fuse

10A

Headlamp - Low Beam - Left

BTSI Fuse

10A

Stoplamp Switch, Floor Shifter Shift Lock Control Solenoid

CRANK Fuse

10A

Ignition Switch, PCM Module

LO HDLP - RT Fuse

10A

Headlamp - Low Beam - Right

FOG LP Relay

--

Not Used

FOG LP Fuse

15A

Not Used

HORN Relay

--

Horn - Low Note, Horn - High Note

W/S WASH Relay

--

Front Windshield Washer Motor and Module

W/S WASH Fuse

15A

W/S WASH Relay, Front Windshield Washer Motor and Module

INFO Fuse

15A

Vehicle Communication Interface Module (VCIM)

RADIO AMP Fuse

30A

Radio Amplifier

RH HID Fuse

20A

Not Used

HORN Fuse

15A

Horn - High/Low Note

EAP Fuse

15A

Not Used

TREC Fuse

30A

Transfer Case Control Module

SBA Fuse

15A

Not Used

Fuse Block - Underhood Top View


Object Number: 819626  Size: LF

Fuse Block - Underhood Bottom View


Object Number: 891850  Size: LF

Fuse Block - Underhood C1


Object Number: 365994  Size: CH

Connector Part Information

    • 12193905
    • 68-Way F Metri-Pack 280 Series Flexlock (GY)

Pin

Wire Color

Circuit No.

Function

A1-A2

--

--

Not Used

A3

YE

5

Crank Voltage

A4

OG

2040

Battery Positive Voltage

A5

OG

4340

Battery Positive Voltage - HVAC Control Module

OG

4340

Battery Positive Voltage - Air Suspension Control Module (w/ZM6)

A6

PK

39

Ignition 1 Voltage

A7

YE

1139

Ignition 1 Voltage - Inflatable Restraint I/P Module Disable Switch

YE

1139

Ignition 1 Voltage - SDM Module

A8

L-GN/BK

584

Park Lock Solenoid Supply Voltage

L-GN/BK

584

A/T Shift Lock Control Switch Supply Voltage

A9

PK

3

Ignition 1 Voltage

A10

OG

1740

Battery Positive Voltage (w/C69)

A11

--

--

Not Used

A12

BN

2409

Interior Park Lamps Supply Voltage - Inflatable Restraint I/P Module Disable Switch

BN

2409

Interior Park Lamps Supply Voltage - Marker/Clearance Lamps

B1

--

--

Not Used

B2

OG

2268

Windshield Washer Relay Control

B3-B7

--

--

Not Used

B8

OG

1840

Battery Positive Voltage

B9

BK/WH

1969

Headlamp Relay Control/Headlamp High Beam Relay Control

B10

--

--

Not Used

B11

OG

3840

Battery Positive Voltage

B12

RD

142

Battery Positive Voltage

C1

OG

1640

Battery Positive Voltage

C2

OG

3240

Battery Positive Voltage - OnStar Module (w/o UE4)

OG

3240

Battery Positive Voltage - OnStar Module (w/o UE4)

C3

BK

28

Horn Relay Control - BCM

BK

28

Horn Relay Control - Turn Signal/Multifunction Switch

C4-C8

--

--

Not Used

C9

PK

1020

Off/Run/Crank Voltage - Park Switch

PK

1020

Off/Run/Crank Voltage - Fuse Block I/P

C10

OG

1040

Battery Positive Voltage

C11

--

--

Not Used

C12

PU

420

TCC Brake Switch/Cruise Control Release Signal

D1-D2

--

--

Not Used

D3

PK/WH

1970

Headlamp Low Beam Relay Control

D4

OG

340

Battery Positive Voltage - Radio

OG

340

Battery Positive Voltage - RSA Controller

D5

OG

640

Battery Positive Voltage - Cigar Lighter

OG

640

Battery Positive Voltage - DLC Connector

D8-D9

--

--

Not Used

D10

PK

639

Ignition 1 Voltage - Traction Control Switch

PK

639

Ignition 1 Voltage - Turn Hazard Switch

D11

--

--

Not Used

D12

OG

1140

Battery Positive Voltage

E1-E2

--

--

Not Used

E3

L-GN /BK

592

DRL Relay Control

E4

OG

4540

Battery Positive Voltage

E5-E6

--

--

Not Used

E7

L-BU

1320

CHMSL Supply Voltage/Stop Lamp Supply Voltage

E8-E9

--

--

Not Used

E10

D-BU

2115

Right Turn Signal Lamps Supply Voltage

E11

OG

2340

Battery Positive Voltage

E12

--

--

Not Used

F1

--

--

Not Used

F2

OG

3740

Battery Positive Voltage

F3

L-BU

2114

Left Turn Signal Lamps Supply Voltage

F4

--

--

Not Used

F5

PK

739

Ignition 1 Voltage

F6

PK

639

Ignition 1 Voltage

F7

OG

2840

Battery Positive Voltage

F8-F9

--

--

Not Used

F10

GY

1524

Backup Lamp Supply Voltage

F11

WH

1080

Park Lamp Relay Control

F12

OG

1540

Battery Positive Voltage

Fuse Block - Underhood C2


Object Number: 362761  Size: CH

Connector Part Information

    • 12193906
    • 68-Way F Metri-Pack 280 Series (BK)

Pin

Wire Color

Circuit No.

Function

A1-A2

--

--

Not Used

A3

D-GN

59

A/C Compressor Clutch Supply Voltage

A4-A6

--

--

Not Used

A7

D-GN/WH

465

Fuel Pump Relay Control - Primary

A8

OG

440

Battery Positive Voltage

A9

PK

1339

Ignition 1 Voltage - TAC Assembly

PK

1339

Ignition 1 Voltage - EBCM Module

A10

L-BU

1320

CHMSL Supply Voltage/Stop Lamp Supply Voltage

A11

GY

1524

Trailer Backup Lamp Supply Voltage

A12

PK

439

Ignition 1 Voltage - EVAP Purge Solenoid

PK

439

Ignition 1 Voltage - PCM Module

B1-B6

--

--

Not Used

B7

BK

550

Ground

B8

OG

440

Battery Positive Voltage

B9

PK

1039

Ignition 1 Voltage

B10

PK

439

Ignition 1 Voltage

B11-B12

--

--

Not Used

C1-C2

--

--

Not Used

C3

D-GN/WH

459

A/C Compressor Clutch Relay Control

C4-C9

--

--

Not Used

C10

PK

1039

Ignition 1 Voltage - Fuel Injector 1

PK

1039

Ignition 1 Voltage - Fuel Injector 3

C11

--

--

Not Used

C12

PU

420

TCC Brake Switch/Cruise Control Release Signal

D1-D2

--

--

Not Used

D3

L-GN

275

Park Neutral Position Switch Park Signal

D4-D5

--

--

Not Used

D8

PK

539

Ignition 1 Voltage - HO2S Bank 1 Sensor 2

PK

539

Ignition 1 Voltage - HO2S Bank 2 Sensor 2

D9

PK

1239

Ignition 1 Voltage - Fuel Injector 2

PK

1239

Ignition 1 Voltage - Fuel Injector 4

D10

PK

1039

Ignition 1 Voltage - Fuel Injector 5

PK

1039

Ignition 1 Voltage - Fuel Injector 7

D11

PU

6

Starter Solenoid Crank Voltage

D12

YE/BK

625

Starter Enable Relay Control

E1-E5

--

--

Not Used

E6

PK

1239

Ignition 1 Voltage - Fuel Injector 6

PK

1239

Ignition 1 Voltage - Fuel Injector 8

E7

PK

1539

Ignition 1 Voltage - HO2S Bank 1 Sensor 1

PK

1539

Ignition 1 Voltage - HO2S Bank 2 Sensor 1

E8-E9

--

--

Not Used

E10

PK

1239

Ignition 1 Voltage

E11-E12

--

--

Not Used

F1-F2

--

--

Not Used

F3

PU

806

Crank Voltage

F4-F7

--

--

Not Used

F8

PK

839

Ignition 1 Voltage

F9

PK

639

Ignition 1 Voltage

F10

PK

1020

Off/Run/Crank Voltage - PCM Module

PK

1020

Off/Run/Crank Voltage - Automatic Transmission

F11

D-GN

1433

Park/Neutral Start Switch Signal

F12

--

--

Not Used

Fuse Block - Underhood C3


Object Number: 362759  Size: CH

Connector Part Information

    • 12193916
    • 32-Way F Metri-Pack 280 Series (RD)

Pin

Wire Color

Circuit No.

Function

A1-A2

--

--

Not Used

A3

D-BU

2115

Right Turn Signal Lamps Supply Voltage

A4

OG

2640

Battery Positive Voltage

A5-A6

--

--

Not Used

B1-B2

--

--

Not Used

B3

L-BU

2114

Left Turn Signal Lamps Supply Voltage

B4

--

--

Not Used

B5

BK

--

Vent Tube

B6

BN

2109

Trailer Park Lamps Supply Voltage

C1

--

--

Not Used

C2

L-GN

1624

Trailer Backup Lamps Supply Voltage

C3-C5

--

--

Not Used

C6

BN/WH

2609

Right Rear Tail Lamp Supply Voltage

BN/WH

2609

Right License/Side Marker Lamps Supply Voltage

D1-D6

--

--

Not Used

E1-E3

--

--

Not Used

E4

BK

550

Ground

E5-E6

--

--

Not Used

F1

GY

120

Fuel Pump Supply Voltage

F2-F3

--

--

Not Used

F4

L-BU

1320

CHMSL Supply Voltage/Stop Lamp Supply Voltage - EBCM

L-BU

1320

CHMSL Supply Voltage/Stop Lamp Supply Voltage - Tail/Stop Lamps

F5

--

--

Not Used

F6

BN

2509

Left Rear Tail Lamp Supply Voltage

BN

2509

Left Rear License/Side Marker Lamps Supply Voltage

Fuse Block - Underhood C4


Object Number: 362760  Size: CH

Connector Part Information

    • 12193914
    • 32-Way F Metri-Pack 280 Series (GN)

Pin

Wire Color

Circuit No.

Function

A1-A2

--

--

Not Used

A3

D-BU

2115

Right Turn Signal Lamps Supply Voltage

D-BU

2115

Right Front Marker Lamp Supply Voltage

A4

BK

550

Ground

A5

--

--

Not Used

A6

D-GN

1329

Left Horn Fuse Supply Voltage

D-GN

1329

Right Horn Fuse Supply Voltage

B1

--

--

Not Used

B2

D-BU

545

DRL Supply Voltage - Left Lamp

D-BU

545

DRL Supply Voltage - Right Lamp

B3-B6

--

--

Not Used

C1

BN

2309

Right Front Park Lamps Supply Voltage

BN

2309

Right Front Side Marker Lamp Supply Voltage

C2

--

--

Not Used

C5

BN

2309

Left Front Park Lamp Supply Voltage

BN

2309

Left Front Side Marker Lamp Supply Voltage

C6

D-GN/WH

266

Rear Window Washer Pump Supply Voltage

D1-D6

--

--

Not Used

E1

L-BU

2114

Left Turn Signal Lamps Supply Voltage

L-BU

2114

Left Front Marker Lamp Supply Voltage

E2

D-GN/WH

711

Left Headlamp High Beam Supply Voltage

E3

L-GN/BK

311

Right Headlamp High Beam Supply Voltage

E4-E6

--

--

Not Used

F1-F3

--

--

Not Used

F4

YE

712

Left Headlamp Low Beam Supply Voltage

F5

TN/WH

312

Right Headlamp Low Beam Supply Voltage

F6

--

--

Not Used

Fuse Block - Underhood C5


Object Number: 845605  Size: CH

Connector Part Information

    • 15393171
    • 2-Way F J-Type (MD GY)

Pin

Wire Color

Circuit No.

Function

A

RD

842

Battery Positive Voltage

B

RD

542

Battery Positive Voltage

Fuse Block - Underhood C6


Object Number: 845608  Size: CH

Connector Part Information

    • 15393172
    • 2-Way F J-Type (L-GN)

Pin

Wire Color

Circuit No.

Function

A

RD

642

Battery Positive Voltage

B

--

--

Not Used

Fuse Block - Underhood C7


Object Number: 845633  Size: CH

Connector Part Information

    • 15393168
    • 2-Way F J-Type (BK)

Pin

Wire Color

Circuit No.

Function

A

RD

342

Battery Positive Voltage

B

RD

42

Battery Positive Voltage

Fuse Block - Underhood C9


Object Number: 845602  Size: CH

Connector Part Information

    • 15393170
    • 2-Way F J-Type (WH)

Pin

Wire Color

Circuit No.

Function

A

RD

442

Battery Positive Voltage

B

RD

4042

Battery Positive Voltage (w/ZM6)

Fuse Block - I/P Label


Object Number: 997688  Size: MF

Fuse

Rating

Description

RR WPR Fuse

15A

Rear Window Wiper/Washer Switch

SEO ACCY Fuse

10A

Body Builder Provision

WS WPR Fuse

25A

Windshield Wiper Motor and Module

TBC ACCY Fuse

10A

Body Control Module (BCM)

IGN 3 Fuse

10A

Heated Seat Module - LR/RR

4WD Fuse

15A

Air Suspension Module, Ride Height Switch, Transfer Case Shift Control Switch

HTR A/C Fuse

30A

Not Used

LOCK Relay

--

Door Lock Actuator - Liftgate, Door Latch Assembly - LR, Door Latch Assembly - RR

HVAC 1 Fuse

10A

HVAC Control Module, HVAC Actuators, Inside Rearview Mirror

L DOOR

--

Fuse Block - I/P C4 (Driver Door Harness)

CRUISE Fuse

10A

Cruise Control Switch

UNLOCK Relay

--

Door Lock Actuator - Liftgate, Door Latch Assembly - LR, Door Latch Assembly - RR

RR FOG LP Relay

--

Not Used

BRAKE Fuse

10A

Stop Lamp Switch

DRIVER UNLOCK Relay

--

Not Used

PDM Fuse

10A

Front Passenger Door Module (FPDM)

IGN O Fuse

10A

Automatic Transmission, Powertrain Control Module (PCM), Shift Lock Control Keylock Solenoid

TBC IGN O Fuse

10A

Body Control Module (BCM)

VEH CHMSL Fuse

10A

CHMSL Stop Lamp, Trailer Wiring Provisions

LT TRLR ST/TRN Fuse

10A

Trailer Wiring Provisions

LT TRN Fuse

10A

Instrument Panel Cluster (IPC), Side Marker Lamps - LF/LR, Turn Signal Lamp - LR, Turn/Park Lamp - LF

VEH STOP Fuse

15A

Turn Signal/Hazard Flasher Module, VEH CHMSL Fuse

BODY

--

Relay Block - Body C3 (Body Harness)

RT TRLR ST/TRN Fuse

10A

Trailer Wiring Provisions

RT TRN Fuse

10A

Instrument Panel Cluster (IPC), Side Marker Lamps - RF/RR, Turn Signal Lamp - RR, Turn/Park Lamp - RF

DDM Fuse

15A

Driver Door Module (DDM)

AUX PWR 2 Fuse

20A

I/P Accessory Power Outlets, Accessory Power Outlet - Rear

LOCKS Fuse

20A

Door Lock/Unlock Relay

ECC Fuse

10A

Liftgate Door Lock Relay

TBC 2C Fuse

15A

Body Control Module (BCM)

FLASH Fuse

25A

Turn Signal/Hazard Flasher Module

LT DOORS CB

25A

Window Switch - LR, Driver Door Module (DDM)

TBC 2B Fuse

15A

Body Control Module (BCM)

TBC 2A Fuse

15A

Body Control Module (BCM)

Fuse Block - I/P Top View


Object Number: 1865853  Size: MF

Fuse Block - I/P Bottom View


Object Number: 880533  Size: LF

Fuse Block - I/P C1


Object Number: 362761  Size: CH

Connector Part Information

    • 12193906
    • 68-Way F Metri-Pack 280 Series (BK)

Pin

Wire Color

Circuit No.

Function

A1

--

--

Not Used

A2

GY/BK

255

Power Door Lock Fuse Supply Voltage

A3

--

--

Not Used

A4

TN/BK

254

Power Door Unlock Fuse Supply Voltage

A5-A6

--

--

Not Used

A7

OG

4240

Battery Positive Voltage

A8

YE

1618

Trailer Left Rear Turn/Stop Lamp Supply Voltage

A9

D-GN

1619

Trailer Right Rear Turn/Stop Lamp Supply Voltage

A10

OG

3040

Battery Positive Voltage

A11

D-BU

2115

Right Turn Signal Lamps Supply Voltage

A12

RD

42

Battery Positive Voltage

B1

YE

143

Accessory Voltage

B2

YE

43

Accessory Voltage

B3-B7

--

--

Not Used

B8

WH

17

Stop Lamp Switch Signal

B9-B11

--

--

Not Used

B12

OG

2140

Battery Positive Voltage

C1-C3

--

--

Not Used

C4

BN

41

Ignition 3 Voltage

C5

--

--

Not Used

C8

L-BU

1620

Trailer CHMSL Supply Voltage

D1

YE

243

Accessory Voltage

D2

--

--

Not Used

D3

BN

341

Ignition 3 Voltage

D5

BN

441

Ignition 3 Voltage

D8-D9

--

--

Not Used

D10

BK/WH

1851

Ground

D11-D12

--

--

Not Used

E1

BN

241

Ignition 3 Voltage - Air Suspension Control Switch (w/ZM6)

BN

241

Ignition 3 Voltage - Air Suspension Control Module (w/ZM6)

E2

BN

241

Ignition 3 Voltage

E3

--

--

Not Used

E4

GY

118

Left Front Door Speaker Output (-)

GY

118

Left Front Tweeter Speaker Output (-)

E5

BN

1046

DDM Class 2 Serial Data

E6

--

--

Not Used

E7

PK

1691

Automatic Day/Night Mirror Low Reference

E8

WH

530

Off/Run/Crank Voltage

E9

--

--

Not Used

E10

RD

842

Battery Positive Voltage

E11

OG

4040

Battery Positive Voltage

E12

OG

2240

Battery Positive Voltage

F1

YE

343

Accessory Voltage

F2

--

--

Not Used

F3

L-BU

2114

Left Turn Signal Lamps Supply Voltage

F4

GY

1690

Automatic Day/Night Mirror Signal

F5

TN

201

Left Front Door Speaker Output (+)

TN

201

Left Front Tweeter Speaker Output (+)

F6

BK

1050

Ground

F7

--

--

Not Used

F8

PK

1020

Off/Run/Crank Voltage

F9

L-BU

1320

CHMSL Supply Voltage/Stop Lamp Supply Voltage

F10-F12

--

--

Not Used

Fuse Block - I/P C2


Object Number: 366024  Size: CH

Connector Part Information

    • 12193930
    • 6-Way F Metri-Pack 280 Series Flexlock (BK)

Pin

Wire Color

Circuit No.

Function

A

OG

300

Ignition 3 Voltage

B

L-GN

1427

Right Turn Signal Switch Signal

C

D-GN

1428

Left Turn Signal Switch Signal

D

WH

111

Hazard Switch Signal

E

WH

1390

Off/Run/Crank Voltage

F

BN

4

Accessory Voltage

Fuse Block - I/P C3


Object Number: 524807  Size: CH

Connector Part Information

    • 12194035
    • 12-Way F Metri-Pack 280 Series (BK)

Pin

Wire Color

Circuit No.

Function

A-B

--

--

Not Used

C

OG

1240

Battery Positive Voltage

D

BK

1050

Ground

E

--

--

Not Used

F

OG

4140

Battery Positive Voltage

G

TN

201

Left Front Speaker Output (+)

H

PK

1691

Automatic Day/Night Mirror Low Reference

J

BN

1046

DDM Class 2 Serial Data

K

GY

1690

Automatic Day/Night Mirror Signal

L

GY

118

Left Front Speaker Output (-)

M

--

--

Not Used

Fuse Block - I/P C4


Object Number: 655838  Size: CH

Connector Part Information

    • 15328768
    • 12-Way F Metri-Pack 280 Series Flexlock (BN)

Pin

Wire Color

Circuit No.

Function

A

--

--

Not Used

B

BN

541

Ignition 3 Voltage - Left Rear Heated Seats (w/KA7)

BN

541

Ignition 3 Voltage - Right Rear Heated Seats (w/KA7)

C

--

--

Not Used

D

OG

3140

Battery Positive Voltage- - Lift Gate Door Lock Relay

OG

3140

Battery Positive Voltage - Lift Gate Door Lock Relay

E

TN

294

Left Rear Door Lock Actuator Unlock Control

TN

294

Right Rear Door Lock Actuator Unlock Control

F

TN

294

Door Lock Actuator Unlock Control

G

--

--

Not Used

H

L-BU

1620

Trailer CHMSL Supply Voltage

J

--

--

Not Used

K

GY

295

Left Rear Door Lock Actuator Lock Control

GY

295

Right Rear Door Lock Actuator Lock Control

L

--

--

Not Used

M

OG

1240

Battery Positive Voltage

Relay Block - I/P Label


Object Number: 997462  Size: MF

Relay Block - I/P Label Usage

Fuse

Rating

Description

SEO 6-WAY BLK

--

Not Used

TRAILER 6-WAY BRN

--

Trailer Provisions or Off Road Lamps

UPFIT 4-WAY CRM

--

Upfitter Provisions

SL RIDE 6-WAY GRY

--

Not Used

HDLNR 2 6-WAY CRM

--

Air Temperature Assembly - Inside, Blower Motor Control Processor, HVAC Actuators, Inside Rearview Mirror

BODY 12-WAY WHT

--

B-Pillar Courtesy Lamps - LR/RR, Door Courtesy Lamps - LR/RR, Driver/Passenger Seat Module, Heated Seat Module - LR/RR, Rear Window Defogger Grid

REAR DEFOG RELAY

--

Rear Window Defogger Grid

HDLNR 1 6-WAY BRN

--

Courtesy/Reading Lamps - Left/Right Front, Courtesy Reading Lamps - Mid/Rear, Garage Door Opener, Inside Rearview Mirror, Vanity Mirror Lamps - Left/Right

SPARE RELAY

--

Not Used

CB SEAT

30A

Driver/Passenger Seat Modules

CB RT DOOR

25A

Front Passenger Door Module (FPDM), Window Switch - RR

SPARE 4-WAY GRY

--

Not Used

INFO 12-WAY BLK

--

Not Used

Relay Block - I/P Top View


Object Number: 829700  Size: LF

Relay Block - I/P Bottom View


Object Number: 892417  Size: LF

Relay Block - I/P C1


Object Number: 365994  Size: CH

Connector Part Information

    • 12193905
    • 68-Way F Metri-Pack 280 Series Flexlock (GY)

Pin

Wire Color

Circuit No.

Function

A1

L-GN

24

Backup Lamp Supply Voltage - BCM

L-GN

24

Backup Lamp Supply Voltage - Junction Block - Rear

A2

--

--

Not Used

A3

BK/WH

1704

Low Reference

A4

D-GN/WH

636

Ambient Air Temperature Sensor Signal

A5

BK/WH

1851

Ground - HVAC Control Module

BK/WH

1851

Ground - Data Link Communications

A6

WH

193

Rear Defog Relay Control

A7

--

--

Not Used

A8

BN/WH

230

Instrument Panel Lamps Dimming Control

A9

BN

341

Ignition 3 Voltage

A10

D-GN/WH

817

Vehicle Speed Signal - Navigational Radio

A11

BN/WH

230

Instrument Panel Lamps Dimming Control - HVAC Control Module

BN/WH

230

Instrument Panel Lamps Dimming Control - Headlamp Switch

A12

GY/BK

690

Courtesy Lamp Supply Voltage

B1-B2

--

--

Not Used

B3

BK/WH

1851

Ground (UB1/UC6 w/o UE4)

B4

--

--

Not Used

B5

BK/WH

1851

Ground

B6

OG

1840

Battery Positive Voltage

B7

RD

642

Battery Positive Voltage

B8

BN/WH

230

Instrument Panel Lamps Dimming Control

B9

D-GN/WH

817

Vehicle Speed Signal - Navigational Radio

B10

GY/BK

690

Courtesy Lamp Supply Voltage - Footwell Courtesy Lamp - Left (If Equipped)

GY/BK

690

Courtesy Lamp Supply Voltage - Footwell Courtesy Lamp - Right (If Equipped)

B11-B12

--

--

Not Used

C1

--

--

Not Used

C2

BN/WH

230

Instrument Panel Lamps Dimming Control - Steering Wheel Controls

BN/WH

230

Instrument Panel Lamps Dimming Control - Traction Control Switch

C3

BN/WH

230

Instrument Panel Lamps Dimming Control

C4

OG

1732

Inadvertent Load Control Courtesy Lamps Supply Voltage - I/P Compartment Lamp

OG

1732

Inadvertent Load Control Courtesy Lamps Supply Voltage - Underhood Lamp

C5

BK/WH

1851

Ground - Rear Seat Audio

BK/WH

1851

Ground - Headlamp Switch

C8

BN/WH

230

Instrument Panel Lamps Dimming Control - Transfer Case

BN/WH

230

Instrument Panel Lamps Dimming Control - Ride Height Switch (w/ZM6)

C9

OG

1340

Battery Positive Voltage

C10

BN

2409

Interior Park Lamps Supply Voltage

C11-C12

--

--

Not Used

D1

WH/BK

5515

Inside Air Temperature Sensor Assembly Control

D2

BN/WH

230

Instrument Panel Lamps Dimming Control

D3

BN/WH

230

Instrument Panel Lamps Dimming Control

D4

OG

1732

Inadvertent Load Control Courtesy/Vanity/Reading Lamps Supply Voltage

D5

BK/WH

1851

Ground - I/PC

BK/WH

1851

Ground - OnStar Module

D8

BK/WH

1851

Ground

D9

BK

1050

Ground

D10

BN

2409

Interior Park Lamps Supply Voltage

D11-D12

--

--

Not Used

E1

BN

718

Low Reference

E2

PK

1691

Automatic Day/Night Mirror Low Reference

E3

--

--

Not Used

E4

PU/WH

1382

LED Dimming Signal - 4WD Indicator Switch

PU/WH

1382

LED Dimming Signal - Ride Height Switch (w/ZM6)

E5

BK/WH

1851

Ground - Radio

BK/WH

1851

Ground - Flasher Module

E6

D-GN/WH

817

Vehicle Speed Signal - Navigational Radio

E7

PU/WH

1382

LED Dimming Signal

E8

BK/WH

1851

Ground - BCM - C2

BK/WH

1851

Ground - BCM - C3

E9

--

--

Not Used

E10

RD

242

Battery Positive Voltage

E11-E12

--

--

Not Used

F1

D-GN

734

Inside Air Temperature Sensor Signal

F2

GY

1690

Automatic Day/Night Mirror Signal

F3

PK

739

Ignition 1 Voltage

F4

--

--

Not Used

F5

BK/WH

1851

Ground

F6

PU/WH

1382

LED Dimming Signal - Headlamp Switch

PU/WH

1382

LED Dimming Signal - BCM

F7

OG

4540

Battery Positive Voltage

F8

BK/WH

1851

Ground

F9

L-BU

1620

Trailer CHMSL Supply Voltage

F10

D-BU

47

Trailer Auxiliary Supply Voltage

F11

YE

243

Accessory Voltage

F12

--

--

Not Used

Relay Block - I/P C3


Object Number: 655838  Size: CH

Connector Part Information

    • 15328768
    • 12-Way F Metri-Pack 280 Series Flexlock (BN)

Pin

Wire Color

Circuit No.

Function

A

L-GN

24

Backup Lamp Supply Voltage

B

OG

4540

Battery Positive Voltage

C

BK

1050

Ground

D

--

--

Not Used

E

BN

341

Ignition 3 Voltage

F

--

--

Not Used

G

BK/WH

1704

Low Reference

H-J

--

--

Not Used

K

D-GN/WH

636

Ambient Air Temperature Sensor Signal

L

GY/BK

690

Courtesy Lamp Supply Voltage

M

OG

1732

Inadvertent Load Control Courtesy/Vanity/Reading Lamps Supply Voltage

Relay Block - I/P C4


Object Number: 886342  Size: CH

Connector Part Information

    • 12193922
    • 6-Way F Metri-Pack 280 Series Flexlock (CRM)

Pin

Wire Color

Circuit No.

Function

A

BN/WH

230

Instrument Panel Lamps Dimming Control - Sunroof Switch (w/CF5)

BN/WH

230

Instrument Panel Lamps Dimming Control - Garage Door Opener

B

PK

1691

Automatic Day/Night Mirror Low Reference

C

GY

1690

Automatic Day/Night Mirror Signal

D

D-GN

734

Inside Air Temperature Sensor Signal

E

BN

718

Low Reference

F

WH/BK

5515

Inside Air Temperature Sensor Assembly Control

Relay Block - I/P C7 (H.D. Trailer Wiring)


Object Number: 886343  Size: CH

Connector Part Information

    • 12193924
    • 6-Way F Metri-Pack 280 Series Flexlock (BN)

Pin

Wire Color

Circuit No.

Function

A

BN

2409

Interior Park Lamps Supply Voltage

B

RD

242

Battery Positive Voltage

C

D-BU

47

Trailer Auxiliary Supply Voltage

D

L-BU

1620

Trailer CHMSL Supply Voltage

E

--

--

Not Used

F

BK

1050

Ground

Relay Block - I/P C7 (Off Road Lighting)


Object Number: 886343  Size: CH

Connector Part Information

    • 12193924
    • 6-Way F Metri-Pack 280 Series Flexlock (BN)

Pin

Wire Color

Circuit No.

Function

A

--

--

Not Used

B

D-BU

242

Battery Positive Voltage

C-E

--

--

Not Used

F

BK

1050

Ground

Relay Block - I/P C10


Object Number: 831381  Size: CH

Connector Part Information

    • 15357030
    • 12-Way F Metri-Pack 280 Series Flex-Lock (WH)

Pin

Wire Color

Circuit No.

Function

A

OG

4540

Battery Positive Voltage - LR Heated Seat Module (w/KA7)

OG

4540

Battery Positive Voltage - RR Heated Seat Module (w/KA7)

B

GY/BK

690

Courtesy Lamp Supply Voltage - Left B-Pillar

GY/BK

690

Courtesy Lamp Supply Voltage - Right B-Pillar

C

GY/BK

690

Courtesy Lamp Supply Voltage - LR Door

GY/BK

690

Courtesy Lamp Supply Voltage - RR Door

D

--

--

Not Used

E

OG

1440

Battery Positive Voltage

F

BN/WH

230

Instrument Panel Lamps Dimming Control - LR Window Switch

BN/WH

230

Instrument Panel Lamps Dimming Control - RR Window Switch

G

--

--

Not Used

H

OG

1440

Battery Positive Voltage

J

--

--

Not Used

K

OG

1340

Battery Positive Voltage

L

PU

293

Rear Defog Element Supply Voltage

M

--

--

Not Used

Junction Block - I/P Top View


Object Number: 850114  Size: MF

Junction Block - I/P Bottom View


Object Number: 1156070  Size: MF

Junction Block - I/P C1 Wire Entry

Connector Part Information

    • 15401495
    • 48-Way M Metri-Pack 280 Series (BK)

Pin

Wire Color

Circuit No.

Function

2A

D-GN

117

Right Front Speaker Output (-)

D-GN

117

Right Front Speaker Output (-)

2B

L-GN

200

Right Front Speaker Output (+)

L-GN

200

Right Front Speaker Output (+)

2C-2E

--

--

Not Used

2F

BK

1050

Ground

3A-3F

--

--

Not Used

4A

BK

1050

Ground

4B

GY/BK

2337

Lower Right Air Temperature Sensor Signal

4C

BN

718

Low Reference

4D

RD

542

Battery Positive Voltage

4E

PU

1838

Recirculation Door Position Signal

4F

PU/WH

760

Blower Motor Speed Control

4G-4H

--

--

Not Used

4J

L-BU/BK

1688

5-Volt Reference

4K

--

--

Not Used

4L

YE

1791

Low Reference

4M

--

--

Not Used

5A

--

--

Not Used

5B

L-GN

2275

Mode Door Position Signal

5C

TN

2273

Mode Door Control

5D

D-BU

1199

Left Air Temperature Door Control

5E

L-BU

733

Left Air Temperature Door Position Signal

5F

--

--

Not Used

6A

--

--

Not Used

6B

BN

2409

Interior Park Lamps Supply Voltage

6C

BK

1050

Ground

6D-6F

--

--

Not Used

7A

--

--

Not Used

7B

TN

1047

PDM Class 2 Serial Data

7C

OG

4240

Battery Positive Voltage

7D

--

--

Not Used

7E

OG

1340

Battery Positive Voltage

7F

--

--

Not Used

8A

WH/BK

2339

Lower Left Air Temperature Sensor Signal

8B

--

--

Not Used

8C

BN

341

Ignition 3 Voltage

8D

D-BU

1646

Right Air Temperature Door Position Signal

8E

WH/BK

1236

Right Air Temperature Door Control

8F

D-GN

1614

Recirculation Door Control

Junction Block - I/P C2


Object Number: 366024  Size: CH

Connector Part Information

    • 12193930
    • 6-Way F Metri-Pack 280 Series Flexlock (BK)

Pin

Wire Color

Circuit No.

Function

A

D-GN

117

Right Front Speaker Output (-)

B

L-GN

200

Right Front Speaker Output (+)

C-E

--

--

Not Used

F

BK

1050

Ground

Junction Block - I/P C4


Object Number: 655757  Size: CH

Connector Part Information

    • 12194037
    • 12-Way F Metri-Pack 280 Series Flexlock (BN)

Pin

Wire Color

Circuit No.

Function

A

BK

1050

Ground

B

GY/BK

2337

Lower Right Air Temperature Sensor Signal

C

BN

718

Low Reference - Air Temperature Sensor - Lower Left

BN

718

Low Reference - Air Temperature Sensor - Lower Right

D

RD

542

Battery Positive Voltage

E

PU

1838

Recirculation Door Position Signal

F

PU/WH

760

Blower Motor Speed Control

G

--

--

Not Used

H

L-BU/BK

1688

5-Volt Reference - Air Temperature Actuator - Left

L-BU/BK

1688

5-Volt Reference - Air Temperature Actuator - Right

J

L-BU/BK

1688

5-Volt Reference - Mode Actuator

L-BU/BK

1688

5-Volt Reference - Recirculation Actuator

K

--

--

Not Used

L

YE

1791

Low Reference - Recirculation Actuator

YE

1791

Low Reference - Mode Actuator

M

YE

1791

Low Reference - Air Temperature Actuator - Left

YE

1791

Low Reference - Air Temperature Actuator - Right

Junction Block -- I/P C5


Object Number: 366012  Size: CH

Connector Part Information

    • 12193924
    • 6-Way F Metri-Pack 280 Series Flexlock (BN)

Pin

Wire Color

Circuit No.

Function

A

--

--

Not Used

B

L-GN

2275

Mode Door Position Signal

C

TN

2273

Mode Door Control

D

D-BU

1199

Left Air Temperature Door Control

E

L-BU

733

Left Air Temperature Door Position Signal

F

--

--

Not Used

Junction Block - I/P C6


Object Number: 655740  Size: CH

Connector Part Information

    • 12193929
    • 6-Way F Metri-Pack 280 Series Flexlock (L-GN)

Pin

Wire Color

Circuit No.

Function

A

--

--

Not Used

B

BN

2409

Interior Park Lamps Supply Voltage

C

BK

1050

Ground

D-F

--

--

Not Used

Junction Block - I/P C7


Object Number: 366003  Size: CH

Connector Part Information

    • 12193922
    • 6-Way F Metri-Pack 280 Series Flexlock (CRM)

Pin

Wire Color

Circuit No.

Function

A

--

--

Not Used

B

TN

1047

PDM Class 2 Serial Data

C

OG

4240

Battery Positive Voltage

D

--

--

Not Used

E

OG

1340

Battery Positive Voltage

F

--

--

Not Used

Junction Block - I/P C8


Object Number: 366015  Size: CH

Connector Part Information

    • 12193928
    • 6-Way F Metri-Pack 280 Series Flexlock (GY)

Pin

Wire Color

Circuit No.

Function

A

WH/BK

2339

Lower Left Air Temperature Sensor Signal

B

BN

341

Ignition 3 Voltage - Mode Actuator

BN

341

Ignition 3 Voltage - Recirculation Actuator

C

BN

341

Ignition 3 Voltage - Air Temperature Actuator - Left

BN

341

Ignition 3 Voltage - Air Temperature Actuator - Right

D

D-BU

1646

Right Air Temperature Door Position Signal

E

WH/BK

1236

Right Air Temperature Door Control

F

D-GN

1614

Recirculation Door Control