GM Service Manual Online
For 1990-2009 cars only
Table 1: Fuse Block - Underhood C1
Table 2: Fuse Block - Underhood C2
Table 3: Fuse Block - Underhood C4
Table 4: Fuse Block - Underhood C5
Table 5: Fuse Block - Underhood C6
Table 6: Fuse Block - Underhood C7

Fuse Block - Underhood Label


Object Number: 1360980  Size: MF

No.

Device

Rating

Description

1

STOP

20A

Stop Lamp Switch

2

AUX

20A

Auxiliary Power Outlets, Data Link Connector (DLC)

5

A/C

10A

HVAC Control Module, Driver Seat Module (Heated Seat Switch), Passenger Seat Module (Heated Seat Switch)

8

WIP/WASH

10A

Windshield Wiper/Washer Switch

9

FOG LP (T96)

15A

Fog Lamp Relay

10

IGN TRNSD

10A

Ignition Switch (Transducer)

11

LH HDLP

10A

Headlamp Assembly - Left

12

RH HDLP

10A

Headlamp Assembly - Right

13

FUEL PMP

15A

Fuel Pump

14

WIPER

25A

Windshield Wiper Relay

15

FRT AX

15A

Front Axle Actuator (4WD)

16

ABS

10A

Electronic Brake Control Module (EBCM), Yaw Rate Sensor (4WD)

17

SIR

10A

Inflatable Restraint Sensing and Diagnostic Module (SDM), Inflatable Restraint I/P Module Disable Switch (C99)

18

HTD SEAT

20A

Heated Seat Assembly - Driver, Heated Seat Assembly - Passenger

19

CRUISE

10A

Inside Rearview Mirror w/Reading Lamps (DC4 w/UE1 or DF8), Cruise Control Switch (K34), Transfer Case Control Module (NP1)

20

ETC

15A

Powertrain Control Module (PCM)

21

DOOR LOCK

20A

Door Lock Switch - Driver (AU3)

22

INJECTOR

15A

Fuel Injectors

23

IGN

15A

Clutch Start Switch (MA5), Ignition Coil 1 Module, Ignition Coil 2 Module, Ignition Coil 3 Module, Ignition Coil 4 Module, Ignition Coil 5 Module (3.5L), Park/Neutral Position (PNP) Switch (M30), A/C Compressor Clutch Relay

24

TRANS

10A

Transmission Solenoids

25

PCMI

10A

Powertrain Control Module (PCM) - C1

26

BACKUP

15A

Park/Neutral Position (PNP) Switch

27

ERLS

15A

Evaporative Emission (EVAP) Canister Purge Solenoid Valve, MAF/IAT Sensor

28

TURN/HAZ RR

15A

Body Control Module (BCM) (Bulb Out - LR, RR Turn Signal)

29

RR PK LP2

10A

Left Tail Lamp Assembly, Body Control Module (BCM) - Dimmed Lights, Passenger Airbag Indicator

30

PCM B

10A

Powertrain Control Module (PCM) - C1 (Battery)

31

ON STAR

10A

Vehicle Communication Interface Module (VCIM)

32

RADIO

15A

Radio

33

CIGAR

20A

Cigar Lighter

34

TBC

10A

Body Control Module (BCM) - C1

35

HORN

10A

Horn Relay

36

TCCM

10A

Transfer Case Shift Control Module (4WD)

37

TURN/HAZ FR

15A

Body Control Module (BCM) (Bulb Out - LF, RF Turn Signal)

38

CLUSTER

10A

Instrument Panel Cluster (IPC)

39

RR PK LP

15A

Right Tail Lamp Assembly, License Lamps

40

FR PK LP

10A

Park Lamp - LF, Park Lamp - RF, Window Switch - Driver, Window Switch - Passenger, Window Switch - LR (Crew Cab), Window Switch - RR (Crew Cab)

41

BLOWER

30A

HVAC Blower Motor

42

PWR/WINDOW

30A

Power Window - Driver, Power Window - Passenger, Power Window - RR (Crew Cab), Power Window - LR (Crew Cab)

43

START

30A

START Relay

44

ABS 2

40A

Electronic Brake Control Module (EBCM) (Relay)

45

ABS 1

30A

Electronic Brake Control Module (EBCM)

46

PWR/SEAT

40A

Seat - Driver (Circuit Breaker)

47

BEAM SEL Relay

--

Headlamp - LH (w/o TT5), Headlamp - RH (w/o TT5), Headlamp - Low Beam - Right/Left (TT5), Headlamp - High Beam - Right/Left (TT5)

50

A/C COMP Relay

--

A/C Compressor Clutch Relay

51

FUEL PUMP Relay

--

Fuel Tank Pressure (FTP) Sensor, Fuel Pump and Sender Assembly

52

FOG LP Relay (T96)

--

Fog Lamp - LF, Fog Lamp - RF

53

PARK LP Relay

--

FR PK LP Fuse, RR PK LP Fuse, RR PK LP2 Fuse

54

HD LP Relay

--

RH HDLP Fuse, LH HDLP Fuse

55

HORN Relay

--

Horn Assembly

56

POWERTRAIN Relay

--

ETC Fuse, O2 Sensor Fuse

57

WIPER Relay

--

WIPER 2 Relay

58

RAP Relay

--

WIPER SW Fuse, PWR WDO Fuse

59

IGN 3 HVAC Relay

--

BLOWER Fuse, CNTRL HD Fuse

61

RUN/CRANK Relay

--

SIR Fuse, CRUISE Fuse, IGN Fuse, TRANS Fuse, BACK UP Fuse, ABS Fuse, ERLS Fuse, FRT AXLE CNTRL Fuse, PCM 1 Fuse and INJECTORS Fuse

62

START Relay

--

Starter Solenoid

63

WIPER 2 Relay

--

Windshield Wiper Motor

64

Diode

--

Wiper Relays (Between)

65

Diode

--

A/C Clutch

66

Maxi Fuse

100A

Generator

67

Fuse Puller (If Equipped)

--

--

69

CAN VENT

10A

Evaporative Emission (EVAP) Canister Vent Solenoid Valve

72

SPARE

10A

Spare Fuse, If Equipped

73

SPARE

15A

Spare Fuse, If Equipped

74

SPARE

20A

Spare Fuse, If Equipped

75

SPARE

25A

Spare Fuse, If Equipped

77

A/C COMP

10A

A/C Compressor Clutch Relay

79

O2 SENSOR

10A

Heated Oxygen Sensor (HO2S) 1, Heated Oxygen Sensor (HO2S) 2

Fuse Block - Underhood Top View


Object Number: 1361004  Size: MF

Fuse Block - Underhood Bottom View


Object Number: 1361040  Size: MF

Fuse Block - Underhood C1


Object Number: 647944  Size: CH

Connector Part Information

    • CA15319892
    • 32-Way F Metri-Pack 280 Series Flexlock (WH)
    • Forward Lamp Harness Connector

Pin

Wire Color

Circuit No.

Function

A1-A2

--

--

Not Used

A3

OG

1840

Battery Positive Voltage

A4-A6

--

--

Not Used

B1-B2

--

--

Not Used

B3

BK

850

Ground

B4-B6

--

--

Not Used

C1

--

--

Not Used

C2

BK

850

Ground (T96)

C3-C6

--

--

Not Used

D1

--

--

Not Used

D2

BK

850

Ground (T96)

D3-D6

--

--

Not Used

E1

BK

850

Ground

BK

850

Ground

E2

PU

34

Fog Lamps Supply Voltage (T96)

PU

34

Fog Lamps Supply Voltage (T96)

E3

OG

640

Headlamp Supply Voltage

OG

640

Headlamp Supply Voltage (TT5)

E4

--

--

Not Used

E5

PK

1200

High Beam Switch Ground

PK

1200

High Beam Switched Ground

E6

BN

9

Park Lamp Supply Voltage

BN

9

Park Lamp Supply Voltage

F1

D-GN

29

Horn Control

F2

--

--

Not Used

F3

OG

640

Headlamp Supply Voltage

OG

640

Headlamp Supply Voltage (TT5)

F4

--

--

Not Used

F5

D-BU

1201

Low Beam Switched Ground

D-BU

1201

Low Beam Switched Ground

F6

--

--

Not Used

Fuse Block - Underhood C2


Object Number: 647951  Size: CH

Connector Part Information

    • 15319896
    • 68-Way F Metri-Pack 280 Series Flexlock (BK)
    • Engine Harness Connector

Pin

Wire Color

Circuit No.

Function

A1-A5

--

--

Not Used

A6

L-GN

24

Backup Lamps Supply Voltage

A7-A10

--

--

Not Used

A11

BK/WH

451

Ground

A12

--

--

Not Used

B1

--

--

Not Used

B2

PK

1539

Ignition 1 Voltage (4WD)

B3-B4

--

--

Not Used

B5

D-GN

59

A/C Compressor Clutch Supply Voltage (C60)

B6

BK

350

Ground

BK

350

Ground (C60)

B7-B10

--

--

Not Used

B11

BK/WH

451

Ground

BK/WH

451

Ground - PCM

B12

--

--

Not Used

C1

--

--

Not Used

C2

PK

139

Ignition 1 Voltage (M30)

C3

PK

539

Run/Crank Voltage

C4-C5

--

--

Not Used

C8-C10

--

--

Not Used

C11

BK/WH

451

Ground

BK/WH

451

Ground

C12

--

--

Not Used

D1

--

--

Not Used

D2

L-GN

275

Park Neutral Position Switch Park Signal (M30)

D3

PK

239

Ignition 1 Voltage

PK

239

Ignition 1 Voltage (3.5L)

D4

--

--

Not Used

D5

PK

439

Ignition 1 Voltage

D8-D10

--

--

Not Used

D11

BK

550

Ground

BK

550

Ground (3.5L)

D12

--

--

Not Used

E1

--

--

Not Used

E2

PU

6

Starter Solenoid Crank Voltage

E3

PK

239

Ignition 1 Voltage

PK

239

Ignition 1 Voltage (M30)

E4

--

--

Not Used

E5

PK

439

Ignition 1 Voltage

E6

--

--

Not Used

E7

BK

550

Ground

E8-E10

--

--

Not Used

E11

BK

550

Ground

BK

550

Ground

E12

--

--

Not Used

F1-F2

--

--

Not Used

F3

PK

239

Ignition 1 Voltage

PK

239

Ignition 1 Voltage (3.5L)

F4

PK

839

Ignition 1 Voltage

F5

PK

414

HO2S - Heater Elements - Supply Voltage

PK

414

HO2S - Heater Elements - Supply Voltage

F6

--

--

Not Used

F7

BK

550

Ground (4WD)

BK

550

Ground (4WD)

F8

BK

550

Ground (4WD)

BK

550

Ground (4WD)

F9-F10

--

--

Not Used

F11

BK

550

Ground

F12

--

--

Not Used

Fuse Block - Underhood C4


Object Number: 647933  Size: CH

Connector Part Information

    • 12193695
    • 2-Way F Maxi-Fuse (WH)
    • Body Harness Connector

Pin

Wire Color

Circuit No.

Function

A

YE

443

Accessory Voltage

YE

443

Accessory Voltage (Regular/Extended Cab)

B

BN

41

Ignition 3 Voltage

Fuse Block - Underhood C5


Object Number: 647933  Size: CH

Connector Part Information

    • 12193693
    • 2-Way F Maxi-Fuse (BK)
    • Body Harness Connector

Pin

Wire Color

Circuit No.

Function

1

OG

540

Battery Positive Voltage

2

RD

542

Battery Positive Voltage

Fuse Block - Underhood C6


Object Number: 647947  Size: CH

Connector Part Information

    • 15319893
    • 32-Way F Metri-Pack 280 Series Flexlock (M-GY)
    • Body Harness Connector

Pin

Wire Color

Circuit No.

Function

A1

--

--

Not Used

A2

OG

1440

Battery Positive Voltage

A3

YE

1139

Ignition 1 Voltage

YE

1139

Ignition 1 Voltage

A4

OG

1540

Battery Positive Voltage (4WD)

A5

OG

2240

Battery Positive Voltage (AG1/AG2)

A6

--

--

Not Used

B1

BK

850

Ground

B2

PK/WH

1970

Headlamp Relay Control

B3

PK

339

Ignition 1 Voltage

PK

339

Ignition 1 Voltage (MA5)

B4

--

--

Not Used

B5

PK

339

Ignition 1 Voltage

PK

339

Ignition 1 Voltage

B6

--

--

Not Used

C1-C2

--

--

Not Used

C5-C6

--

--

Not Used

D1-D2

--

--

Not Used

D5-D6

--

--

Not Used

E1-E2

--

--

Not Used

E3

D-BU

338

Run/Crank Voltage

E4-E5

--

--

Not Used

E6

PK

739

Ignition 1 Voltage

F1

BN/WH

301

Park Lamps Relay Control

F2

--

--

Not Used

F3

BK

850

Ground

F4

WH/BK

448

Powertrain Diagnostic Enable

F5

OG

1240

Battery Positive Voltage (AU3)

F6

--

--

Not Used

Fuse Block - Underhood C7


Object Number: 647955  Size: CH

Connector Part Information

    • 15319897
    • 68-Way F Metri-Pack 280 Series Flexlock (L-GY)
    • Body Harness Connector

Pin

Wire Color

Circuit No.

Function

A1

PK

1439

Ignition 1 Voltage

PK

1439

Ignition 1 Voltage (4WD)

A2-A3

--

--

Not Used

A4

OG

440

Battery Positive Voltage

A5

BK

28

Horn Relay Control

A6

--

--

Not Used

A7

YE

317

Fog Lamp Relay Control (T96)

A8

D-GN/WH

465

Fuel Pump Relay Control

A9-A12

--

--

Not Used

B1

--

--

Not Used

B2

OG

740

Battery Positive Voltage

B3

OG

1340

Battery Positive Voltage

B4-B6

--

--

Not Used

B7

GY

120

Fuel Pump Supply Voltage

B8-B9

--

--

Not Used

B10

YE

143

Accessory Voltage

B11

OG

240

Battery Positive Voltage (KC5)

B12

--

--

Not Used

C1

OG

840

Battery Positive Voltage

C2

BK

850

Ground

C3

OG

1740

Battery Positive Voltage

C4

--

--

Not Used

C5

BN

9

Park Lamps Supply Voltage

C8-C9

--

--

Not Used

C10

BK/WH

1969

Beam Select Relay Control

C11

BN

9

Park Lamp Supply Voltage (A31)

BN

9

Park Lamp Supply Voltage (Crew Cab)

C12

--

--

Not Used

D1

YE/BK

625

Starter Relay Control

D2

PU

92

Windshield Wiper Motor High Speed

D3

D-GN

95

Windshield Wiper Motor Low Speed

D4

GY

91

Windshield Wiper Switch Signal 2

D5

BN

9

Park Lamp Supply Voltage

BN

9

Park Lamp Supply Voltage

D8

OG

40

Battery Positive Voltage

D9-D12

--

--

Not Used

E1

--

--

Not Used

E2

OG

1640

Battery Positive Voltage

E3

OG

340

Battery Positive Voltage (UE1)

E4

OG

1140

Battery Positive Voltage

E5

BN

9

Park Lamps Supply Voltage

E6

PK

239

Run/Crank Voltage

E7

D-GN

113

Windshield Wiper Switch Signal 2

E8

--

--

Not Used

E9

BN

141

Ignition 3 Voltage - Heated Seat Switch

BN

141

Ignition 3 Voltage - HVAC Control Module

E10

--

--

Not Used

E11

OG

140

Battery Positive Voltage

E12

--

--

Not Used

F1-F2

--

--

Not Used

F3

PK

639

Ignition 1 Voltage

F5

D-GN/WH

459

A/C Compressor Relay Control

F6

L-GN

24

Backup Lamp Supply Voltage

F7

D-GN

1433

PNP/Clutch Start Switch Signal

D-GN

1433

Clutch Start Switch Signal (MA5)

F8-F9

--

--

Not Used

F10

OG

300

Ignition 3 Voltage

F11

BN

9

Park Lamp Supply Voltage

BN

9

Park Lamp Supply Voltage (Crew Cab)

F12

BK

755

RAP Relay Coil Control