GM Service Manual Online
For 1990-2009 cars only
Connector 1: Fuse Block - 1 Label
Connector 2: Fuse Block - 1 Front View
Connector 3: Fuse Block - 1 Back View
Connector 4: Fuse Block - 1 Wire Entry
Connector 5: Fuse Block - 2 Label
Connector 6: Fuse Block - 2 Front View
Connector 7: Fuse Block - 2 Back View
Connector 8: Fuse Block - 2 Wire Entry
Connector 9: Fuse Block - I/P - 1 Label
Connector 10: Fuse Block - I/P - 1 Top View
Connector 11: Fuse Block - I/P - 1 Bottom View
Connector 12: Fuse Block - I/P - 1 Wire Entry
Connector 13: Fuse Block - I/P - 2 Label
Connector 14: Fuse Block - I/P - 2 Top View
Connector 15: Fuse Block - I/P - 2 Bottom View
Connector 16: Fuse Block - I/P - 2 Wire Entry
Connector 17: Relay Block 1 Top View
Connector 18: Relay Block 1 Bottom View
Connector 19: Relay Block 1 Wire Entry
Connector 20: Relay Block 2 Front View
Connector 21: Relay Block 2 Back View
Connector 22: Relay Block 2 Wire Entry
Connector 23: Relay Block 3

Fuse Block - 1 Label


Object Number: 1509949  Size: MF

Fuse Block - 1 Label Usage

Device

Rating

Description

Fuse 1 (FL1)

40A

Fuse Block - I/P - 2

Fuse 2 (FL2)

40A

Fuse Block - I/P - 1

Fuse 3 (FL3)

40A

Fuse Block - I/P - 1

Fuse 4 (FL4) (JE3)

60A

Fuse Block - I/P - 2

Fuse 4 (FL4) (JE4)

--

Not Used

Fuse 5 (FL5)

40A

Fuse Block - I/P - 1, Ignition Relay 1

Fuse 6 (FL6)

40A

Fuse Block - I/P - 2

Fuse 7 (FL7)

40A

Ignition Relay 2

Fuse Block - 1 Front View


Object Number: 1349909  Size: MF

Fuse Block - 1 Back View


Object Number: 1349911  Size: MF

Fuse Block - 1 Wire Entry

Connector Part Information

  • OEM: 8-97324-714-0
  • Description: 14-Way Slow-Blow Fuse Block (BK)

Fuse Block - 1 Wire Entry

Pin

Wire Color

Circuit No.

Function

A1

--

PA22

Battery Positive Voltage Bus

A2

--

PA22

Battery Positive Voltage Bus

A3

--

PA22

Battery Positive Voltage Bus

A4

RD

PA22

Battery Positive Voltage

A5

--

PA22

Battery Positive Voltage Bus

A6

--

PA22

Battery Positive Voltage Bus

A7

--

PA22

Battery Positive Voltage Bus

B1

RD/D-GN

PA04

Battery Positive Voltage

B2

RD/BK

PA02

Battery Positive Voltage

B3

RD/WH

PA03

Battery Positive Voltage

B4

RD

BG14

Battery Positive Voltage (JE3)

--

--

Not Used (JE4)

B5

RD/YE

PA05

Battery Positive Voltage

B6

RD/D-BU

PA06

Battery Positive Voltage

B7

YE

PA07

Battery Positive Voltage

Fuse Block - 2 Label


Object Number: 1509950  Size: MF

Fuse Block - 2 Label Usage

Device

Rating

Description

Fuse 8 (FL8)

40A

Fuse Block - I/P - 2

Fuse 9 (FL9)

40A

Fuse Block - I/P - 1, Fuse Block - I/P - 2

Fuse 10 (FL10)

40A

Accy Relay, Fuse Block - I/P - 1, Ignition Relay 3

Fuse 11 (FL11)

40A

Electronic Brake Control Module (EBCM) (JE3)

40A

ABS Relay (JE4)

Fuse 12 (FL12)

40A

Electronic Brake Control Module (EBCM) (JE3)

40A

Tractor/Trailer Receptacle (JE4, RQ2 and U86 or JE4 and RQ3)

Fuse 13 (FL13)

40A

Electronic Brake Control Module (EBCM) (JE3)

40A

Not Used (JE4)

Fuse 14 (FL14)

40A

Air Compressor Relay (JE3 and K16)

40A

Trailer Stop Lamp Relay (JE4, RQ2 and U86 or JE4 and RQ3)

Fuse Block - 2 Front View


Object Number: 1349916  Size: MF

Fuse Block - 2 Back View


Object Number: 1349922  Size: MF

Fuse Block - 2 Wire Entry

Connector Part Information

  • OEM: 8-97324-713-0
  • Description: 14-Way Slow-Blow Fuse Block (BK)

Fuse Block - 2 Wire Entry

Pin

Wire Color

Circuit No.

Function

A1

--

PA24

Battery Positive Voltage Bus

A2

--

PA24

Battery Positive Voltage Bus

A3

--

PA24

Battery Positive Voltage Bus

A4

RD

PA24

Battery Positive Voltage

A5

--

PA24

Battery Positive Voltage Bus

A6

--

PA24

Battery Positive Voltage Bus

A7

--

PA24

Battery Positive Voltage Bus

B1

YE/BK

PA08

Battery Positive Voltage

B2

YE/RD

PA09

Battery Positive Voltage

B3

YE/D-GN

PA10

Battery Positive Voltage

B4

WH

BB02

Battery Positive Voltage (JE4)

WH

BG05

Battery Positive Voltage (JE3)

B5

WH/BK

BG07

Battery Positive Voltage (JE3)

D-BU

MF05

Battery Positive Voltage (JE4, RQ2 and U86 or JE4 and RQ3)

B6

WH/RD

BG06

Battery Positive Voltage (JE3)

B7

RD

BG29

Battery Positive Voltage (JE3)

RD

MF07

Battery Positive Voltage (JE4, RQ2 and U86 or JE4 and RQ3)

Fuse Block - I/P - 1 Label


Object Number: 1509954  Size: MF

Fuse Block - I/P - 1 Label Usage

Device

Rating

Description

Circuit Breaker 1

15A

Ignition Switch

Circuit Breaker 2

15A

C201 (Upfitter Connector), Cigar Lighter, Instrument Panel Cluster (IPC), Radio (UM6 or UM7)

Circuit Breaker 3

15A

Auto Cruise Switch (K34), Fuel Heater Relay, Power Take-Off Switch (PTO), Pressure Control Valve Relay

Circuit Breaker 4

15A

Chime Module, Instrument Panel Cluster (IPC), Serial Data Gateway (SDG) Module (JE4 or JE3 w/Allison® MD), Transmission Control Module (TCM) (Allison® LCT), Transmission Control Module (TCM) (Allison® MD)

Circuit Breaker 5

15A

Controller Area Network (CAN) Connector, Data Link Connector (DLC)

Circuit Breaker 6

15A

AUX Relay, Blower Motor Relay, Driver Information Center (DIC), DRL Off Relay, DRL Off 2 Relay (JE3), DRL On Relay, Generator, Ignition Relay 1, Ignition Relay 2, Instrument Panel Cluster (IPC), Window Relay, Windshield Washer Fluid Pump, Windshield Wiper Switch

Circuit Breaker 7

20A

Dome Lamp, Horn Relay, Radio (UM6 or UM7), Rear Compartment Lamp Relay (Z89), Rear Compartment Lamp Switch (Z89)

Circuit Breaker 8

20A

Window Relay

Circuit Breaker 9

20A

ABS Relay (JE4), Air Brake Dryer (JE4 and JTU), Air Suspension Dump Switch (G40 or G45), Backup Lamp Switch (M/T), Clutch Pedal Position (CPP) Switch, Differential Lock Switch (HNB), Electronic Brake Control Module (EBCM), Engine Control Module (ECM), Exhaust Brake Relay (K40), High Idle Switch (UF3), Low Air Pressure Switch (JE3 and K16 or JE4 and KK3), Marker Lamp Switch (JE4, RQ2 and U86 or JE4 and RQ3), Overdrive (OD) Defeat Switch (Allison® LCT), Park Brake Relay (JE4), Park/Neutral Position (PNP) Switch (Allison® LCT), PTO Relay, Reverse Relay (Allison® MD), Stop Lamp Relay, Traction Control Indicator Resistor (NW9), Traction Control Switch (NW9)

Circuit Breaker 10

15A

ECM Relay, Engine Control Module (ECM)

Circuit Breaker 11

20A

Turn Trailer Relay - Left

Circuit Breaker 12

25A

AUX Relay

Circuit Breaker 13

25A

C100 (Upfitter AUX WRG Connector, C201 (Upfitter Connector)

Fuse Block - I/P - 1 Top View


Object Number: 1349925  Size: LF

Fuse Block - I/P - 1 Bottom View


Object Number: 1349926  Size: LF

Fuse Block - I/P - 1 Wire Entry

Connector Part Information

  • OEM: 7354-1213
  • Description: 50-Way F Fuse Block (NA)

Pin

Wire Color

Circuit No.

Function

A1

YE/D-GN

PA10

Battery Positive Voltage

A2

WH/RD

PA11

Battery Positive Voltage

A3

D-BU

PA18

Ignition 1 Voltage

A4

BN/WH

PA20

Ignition 1 Voltage

A5

YE/RD

JA01

Battery Positive Voltage

A6

D-GN

JA02

Battery Positive Voltage

B1-B6

--

--

Not Used

C1

D-BU

PA15

Ignition 2 Voltage

C2

YE

SA13

Ignition 2 Voltage

C3

--

PA02

Battery Positive Voltage Bus

C4

OG

IA01

Battery Positive Voltage

C5

--

PA03

Battery Positive Voltage Bus

C6

OG

SA06

Battery Positive Voltage

D1-D2

--

--

Not Used

D3

RD/BK

PA02

Battery Positive Voltage

D4

--

--

Not Used

D5

RD/WH

PA03

Battery Positive Voltage

D6

--

--

Not Used

E1

D-BU

CF09

Ignition 1 Voltage

E2

PK

CF10

Ignition 1 Voltage

E3

--

PA02

Battery Positive Voltage Bus

E4

OG/WH

UA01

Battery Positive Voltage

E5

--

PA03

Battery Positive Voltage Bus

E6

OG

SA04

Battery Positive Voltage

F1

RD/BK

PA36

Battery Positive Voltage

F2

OG

MA02

Battery Positive Voltage

F3

RD/WH

PA31

Ignition 1 Voltage

F4

PK

CF25

Ignition 1 Voltage

G1-G4

--

--

Not Used

H1

RD/YE

PA05

Ignition 1 Voltage

H2

OG

HF05

Ignition 1 Voltage

H3

RD/YE

CF01

Ignition 1 Voltage

H4

OG

CF02

Ignition 1 Voltage

J1-J4

--

--

Not Used

K1-K4

--

--

Not Used

Fuse Block - I/P - 2 Label


Object Number: 1509954  Size: MF

Fuse Block - I/P - 2 Label Usage

Device

Rating

Description

Circuit Breaker 14

15A

Headlamp - High Beam - Left, Headlamp - Low Beam - Left

Circuit Breaker 15

15A

Headlamp - High Beam - Right, Headlamp - High Beam - Right

Circuit Breaker 16

15A

DRL Indicator Relay, Headlamp High Beam Relay, Headlamp Relay, Lighting Relay

Circuit Breaker 17

20A

Fuel Heater Relay

Circuit Breaker 18

15A

Engine Control Module (ECM), Instrument Panel Cluster (IPC), Serial Data Gateway (SDG) Module (JE4 or JE3 w/Allison® MD), Transmission Control Module (TCM) (Allison® LCT), Transmission Control Module (TCM) (Allison® MD)

Circuit Breaker 19

20A

Marker Lamp Relay (JE4, RQ2 and U86 or JE4 and RQ3), Marker Lamp Switch (JE4, RQ2 and U86 or JE4 and RQ3), Tail Lamp Relay

Circuit Breaker 20

20A

A/C Compressor Clutch Relay (C60), Condenser Fan Relay (C60)

Circuit Breaker 21

20A

Windshield Wiper Motor

Circuit Breaker 22

20A

Auto Cruise Switch (K34), Rear Axle Shift Motor - Two Speed (HPZ), Rear Axle Shift Relay - Two Speed (HPZ)

Circuit Breaker 23

--

Not Used

Circuit Breaker 24

20A

Blower Motor Relay

Circuit Breaker 25

15A

Electronic Brake Control Module (EBCM) (JE3), Stop Lamp Switch, Turn Signal/Hazard Flasher Module, Trailer Stop Lamp Switch (JE4, RQ2 and U86 or JE4 and RQ3)

Circuit Breaker 26

20A

Auxiliary Power Post (+)

Fuse Block - I/P - 2 Top View


Object Number: 1349931  Size: LF

Fuse Block - I/P - 2 Bottom View


Object Number: 1349933  Size: LF

Fuse Block - I/P - 2 Wire Entry

Connector Part Information

  • OEM: 7354-1213
  • Description: 50-Way F Fuse Block (NA)

Fuse Block - I/P - 2 Wire Entry

Pin

Wire Color

Circuit No.

Function

A1

--

PA04

Battery Positive Voltage Bus

A2

RD/YE

AA01

Battery Positive Voltage

A3

RD/D-GN

BA07

Battery Positive Voltage

A4

D-GN

BA08

Battery Positive Voltage

A5

YE/BK

HA09

Battery Positive Voltage

A6

L-GN

HA10

Battery Positive Voltage

B1

RD/D-GN

PA04

Battery Positive Voltage

B2-B6

--

--

Not Used

C1

--

PA04

Battery Positive Voltage Bus

C2

RD/WH

AA05

Battery Positive Voltage

C3

--

PA06

Battery Positive Voltage Bus

C4

D-GN/RD

HA01

Battery Positive Voltage

C5

--

PA09

Battery Positive Voltage Bus

C6

OG

JA05

Battery Positive Voltage

D1-D2

--

--

Not Used

D3

RD/D-BU

PA06

Battery Positive Voltage

D4

--

--

Not Used

D5

YE/RD

PA09

Battery Positive Voltage

D6

--

--

Not Used

E1

RD/D-GN

PA35

Battery Positive Voltage

E2

OG

AA14

Battery Positive Voltage

E3

--

PA06

Battery Positive Voltage Bus

E4

D-BU/RD

FA01

Battery Positive Voltage

E5

--

PA09

Battery Positive Voltage Bus

E6

D-GN/RD

SA03

Battery Positive Voltage

F1

YE/BK

PA08

Battery Positive Voltage

F2

OG

DF71

Battery Positive Voltage

F3

OG

PA33

Ignition 2 Voltage

F4

PK

FC01

Ignition 2 Voltage

G1-G4

--

--

Not Used

H1

OG

DF54

Ignition 2 Voltage

H2

PK

DF55

Ignition 2 Voltage

H3

RD/YE

CF01

Ignition 1 Voltage

H4

OG

CF02

Ignition 1 Voltage

J1-J4

--

--

Not Used

K1-K4

--

--

Not Used

Relay Block 1 Top View


Object Number: 1349934  Size: LF

No.

Device

Rating

Description

1

Window Relay

--

Power Window

2

ECM Relay

--

Engine Control Module (ECM)

3

Headlamp High Beam Relay

--

Headlamps

4

Headlamp Low Beam Relay

--

Headlamps

5

Headlamp Relay

--

Headlamps

6

Turn Trailer Relay - Left

--

Trailer Left Rear Turn/Stop Lamp

7

Tail Lamp Relay

--

Tail Lamps

8

Marker Lamp Relay (JE4, RQ2 and U86 or JE4 and RQ3)

--

Clearance, Identification (ID) and Marker Lamps

9

Turn Trailer Relay - Right

--

Trailer Right Rear Turn/Stop Lamp

Relay Block 1 Bottom View


Object Number: 1349937  Size: LF

Relay Block 1 Wire Entry

Connector Part Information

  • OEM: 7154-1216
  • Description: 9-Position Relay Block (BK)

Relay Block 1 Wire Entry

Pin

Wire Color

Circuit No.

Function

1

OG/WH

UA01

Battery Positive Voltage

OG

UA02

Window Supply Voltage

BN/WH

UA03

Ignition 1 Voltage

BK

UX01

Ground

2

OG

CF02

Battery Positive Voltage

OG

CF03

Battery Positive Voltage

RD/WH

CF04

Ignition 0 Voltage

WH

CF06

ECM Power Enable

3

OG

AA25

Battery Positive Voltage

RD/YE

AA26

High Beam Signal

OG

AA27

Battery Positive Voltage

RD/YE

AA28

High Beam Indicator Control

4

RD/BK

AA04

Headlamp Low Beam Ground

RD/YE

AA11

DRL Resistor Supply Voltage

YE

AA13

Lighting Relay Output

OG

AA14

Relay Control

RD/BK

AA15

Battery Positive Voltage

5

BK/WH

AA08

Headlamp High Beam Ground

YE

AA13

Lighting Relay Output

OG

AA16

Battery Positive Voltage

RD/YE

AA17

Headlamp Switch Signal

BK

AX01

Ground

6

D-GN

JA02

Battery Positive Voltage

YE

JA03

Trailer Left Rear Turn/Stop Lamp Supply Voltage

L-BU

JA04

Left Front Turn Signal Lamp Supply Voltage

BK

JX01

Ground

7

D-GN

BA08

Battery Positive Voltage

BN

BA09

Tail Lamp Supply Voltage

D-GN

BA10

Battery Positive Voltage

D-GN/WH

BA11

Headlamp Switch Signal

8

OG

BA16

Marker Lamp Switch Signal (JE4, RQ2 and U86 or JE4 and RQ3)

D-GN

BA19

Tail Lamp Supply Voltage (JE4, RQ2 and U86 or JE4 and RQ3)

BN

BA20

Marker Lamp Supply Voltage (JE4, RQ2 and U86 or JE4 and RQ3)

BK

BX06

Ground (JE4, RQ2 and U86 or JE4 and RQ3)

9

OG

JA05

Battery Positive Voltage

D-GN

JA06

Trailer Right Rear Turn/Stop Lamp Supply Voltage

D-BU

JA07

Right Front Turn Signal Lamp Supply Voltage

BK

JX02

Ground

Relay Block 2 Front View


Object Number: 1349939  Size: LF

No.

Device

Rating

Description

1

Condenser Fan Relay (C60)

--

Condenser Fan Motor (C60)

2

A/C Compressor Clutch Relay (C60)

--

A/C Compressor Clutch (C60)

3

Blower Motor Relay

--

A/C Compressor Clutch Relay (C60), Blower Motor, Condenser Fan Relay (C60) and HVAC Control Assembly

4

Accy Relay

--

Circuit Breaker 2

5

Ignition Relay 1

--

Circuit Breaker 9

6

Ignition Relay 2

--

Circuit Breakers 18 and 22

7

AUX Relay

--

C100 (Exterior Upfitter AUX WRG Connector, 12 Cavity) and C201 (Interior Upfitter Connector, 6 Cavity)

8

Horn Relay

--

Horn (w/o U08), Horns, (U08)

9

Ignition Relay 3

--

Circuit Breakers 3 and 6

Relay Block 2 Back View


Object Number: 1349940  Size: LF

Relay Block 2 Wire Entry

Connector Part Information

  • OEM: 7154-1216
  • Description: 9-Position Relay Block (BK)
  • 3 Positions Optional on Left Side

Relay Block 2 Wire Entry

Pin

Wire Color

Circuit No.

Function

1

D-GN/RD

HA01

Battery Positive Voltage (C60)

D-BU/WH

HA02

Condenser Fan Motor Supply Voltage (C60)

L-GN

HA03

Blower Motor Relay Supply Voltage (C60)

D-GN/WH

HA04

A/C High Pressure Switch Supply Voltage (C60)

2

D-GN/RD

HA05

Battery Positive Voltage (C60)

L-BU

HA06

A/C High Pressure Switch Supply Voltage (C60)

L-GN

HA07

Blower Motor Relay Supply Voltage (C60)

D-GN/RD

HA08

Evaporator Temperature Sensor Signal (C60)

3

L-GN

HA10

Battery Positive Voltage

L-GN

HA11

Blower Motor Relay Supply Voltage

BN/WH

HA18

Ignition 1 Voltage

BK

HX03

Ground

4

YE/D-GN

PA14

Battery Positive Voltage

D-BU

PA15

Ignition 2 Voltage

D-BU

PA16

Ignition 2 Voltage

BK

PX01

Ground

5

RD/YE

PA30

Battery Positive Voltage

RD/WH

PA31

Ignition 1 Voltage

BN/WH

PA32

Ignition 1 Voltage

BK

PX04

Ground

6

YE

PA07

Battery Positive Voltage

OG

PA33

Ignition 2 Voltage

BN/WH

PA34

Ignition 1 Voltage

BK

PX05

Ground

7

OG

SA06

Battery Positive Voltage

PK

SA07

Auxiliary Relay Supply Voltage

BN/WH

SA06

Ignition 1 Voltage

BK

SX04

Ground

8

OG

DA01

Battery Positive Voltage

D-GN/RD

DA03

Horn Relay Control

OG

DA04

Battery Positive Voltage

D-GN

DA02

Horn Supply Voltage

9

YE/D-GN

PA17

Battery Positive Voltage

D-BU

PA18

Ignition 1 Voltage

D-BU

PA19

Ignition 1 Voltage

BK

PX02

Ground

Relay Block 3


Object Number: 1767477  Size: SF

Relay Block 3 - Relay Positioning

Device

Rating

Description

Park Brake Relay

--

Park Brake Switch

DRL On Relay

--

Headlamps

DRL Off Relay

--

DRL On Relay

DRL Indicator Relay

--

Instrument Panel Cluster (IPC)

Fuel Heater Relay (C30)

--

Fuel Heater (Part of Fuel Filter)

Stop Lamp Relay

--

Engine Control Module (ECM), Electronic Brake Control Module (EBCM) - JE4