GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2004 🢒 TopKick C-Series (Conventional) C4/C5 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 Engine Controls Connector End Views
Table 1: Accelerator Pedal Position (APP) Sensor
Table 2: Camshaft Position (CMP) Sensor
Table 3: Crankshaft Position (CKP) Sensor
Table 4: Engine Coolant Temperature (ECT) Sensor
Table 5: Engine Oil Pressure (EOP) Sensor
Table 6: Fuel Heater
Table 7: Fuel Injection Control Module (FICM) Connector - C1
Table 8: Fuel Injection Control Module (FICM) Connector - C2
Table 9: Fuel Pump-Secondary
Table 10: Fuel Rail Pressure (FRP) Regulator
Table 11: Fuel Rail Pressure (FRP) Sensor
Table 12: Fuel Temperature Sensor
Table 13: Glow Plug/Intake Heater Relay Assembly
Table 14: High Idle Switch
Table 15: Intake Air Temperature (IAT)/Mass Air Flow (MAF) Sensor
Table 16: Manifold Absolute Pressure (MAP) Sensor
Table 17: Turbocharger Boost Pressure Sensor
Table 18: Vehicle Speed Sensor
Table 19: Water in Fuel Sensor

Accelerator Pedal Position (APP) Sensor


Object Number: 632344 Size: CH

Connector Part Information
    • 15326842
    • 10-Way F GT 150 Series Sealed (BK)

Pin

Wire Color

Circuit No.

Function

A

D-GN

1163

APP Sensor 3 Signal

B

YE/BK

1275

5-Volt Reference

C

--

--

Not Used

D

WH/BK

1164

5-Volt Reference

E

D-BU

1161

APP Sensor 1 Signal

F

GY

1273

Low Reference

G

PU

1272

Low Reference

H

L-BU

1162

APP Sensor 2 Signal

J

TN

1274

5-Volt Reference

K

BN

1271

Low Reference

Camshaft Position (CMP) Sensor


Object Number: 684840 Size: CH

Connector Part Information
    • 12129946
    • 3-Way F 150 Series Sealed (GY)

Pin

Wire Color

Circuit No.

Function

A

RD

631

12-Volt Reference

B

PK/BK

632

Low Reference

C

BN/WH

633

CMP Sensor Signal

Crankshaft Position (CKP) Sensor


Object Number: 684840 Size: CH

Connector Part Information
    • 12129946
    • 3-Way F 150 Series Sealed (GY)

Pin

Wire Color

Circuit No.

Function

A

L-GN

1867

12-Volt Reference

B

YE/BK

1868

Low Reference

C

D-BU/WH

1869

CKP Sensor Signal

Engine Coolant Temperature (ECT) Sensor


Object Number: 646176 Size: CH

Connector Part Information
    • 12162195
    • 2-Way F SER 150.2 Series Sealed (BK)

Pin

Wire Color

Circuit No.

Function

A

GY

720

Low Reference

B

YE

410

ECT Sensor Signal

Engine Oil Pressure (EOP) Sensor


Object Number: 334964 Size: CH

Connector Part Information
    • 12078090
    • 3-Way F Metri-Pack 150 Series, Sealed P2S (BK)

Pin

Wire Color

Circuit No.

Function

1

BK

407

Low Reference

2

TN/WH

332

Oil Pressure Sensor Signal

3

GY

705

5-Volt Reference

Fuel Heater


Object Number: 68721 Size: CH

Connector Part Information
    • 12059450
    • 2-Way F Metri-pack 280 Series Sealed (BK)

Pin

Wire Color

Circuit No.

Function

1

PK

2677

Battery Positive Voltage

2

BK

IC96

Ground

Fuel Injection Control Module (FICM) Connector - C1


Object Number: 743315 Size: CH

Connector Part Information
    • 1928403454
    • 81-Way F Bosch Series (BK)

Pin

Wire Color

Circuit No.

Function

1

L-GN/WH

--

Fuel Injector 4 Command

2

BK

--

Ground

3

OG/BK

--

Ignition Voltage

4

L-GN/RD

--

Fuel Injector 1 Command

5

PK

1239

Ignition 1 Voltage

6-43

--

--

Not Used

44

L-BU/BK

844

Fuel Injector 4 Control

45

BK/WH

845

Fuel Injector 5 Control

46

--

--

Not Used

47

PK/BK

1746

Fuel Injector 3 Control

48

RD/BK

877

Fuel Injector 7 Control

49-58

--

--

Not Used

59

L-GN/PU

--

Fuel Injector 6 Command

60

L-GN/PU

--

Fuel Injector 6 Command

61

L-GN/OG

--

Fuel Injector 7 Command

62

L-GN/OG

--

Fuel Injector 7 Command

63

D-BU/WH

878

Fuel Injector 8 Control

64

YE/BK

846

Fuel Injector 6 Control

65

--

--

Not Used

66

BK

1744

Fuel Injector 1 Control

67

L-GN/BK

1745

Fuel Injector 2 Control

68-81

--

--

Not Used

Fuel Injection Control Module (FICM) Connector - C2


Object Number: 743317 Size: CH

Connector Part Information
    • 1928403462
    • 40-Way F Bosch Series (BLK)

Pin

Wire Color

Circuit No.

Function

82-89

--

--

Not Used

90

D-GN

2362

CAN Serial Data Low

91

YE

2361

CAN Serial Data High

92-93

--

--

Not Used

94

L-BU

2832

Engine Speed Signal

95-113

--

--

Not Used

114

BK/GN

--

Ground

115

L-GN/BK

--

Fuel Injector 3 Command

116

L-GN/RD

--

Fuel Injector 5 Command

117

--

--

Not Used

118

OG/WH

--

Ignition Voltage

119

PK

1239

Ignition Voltage

120

L-GN

--

Fuel Injector 8 Command

121

L-GN

--

Fuel Injector 2 Command

Fuel Pump-Secondary


Object Number: 68721 Size: CH

Connector Part Information
    • 12059450
    • 2-Way F Metri-pack 280 Series Sealed (BK)

Pin

Wire Color

Circuit No.

Function

A

BK

350

Ground

B

GY

120

Fuel Pump Supply Voltage

Fuel Rail Pressure (FRP) Regulator


Object Number: 1366587 Size: CH

Connector Part Information
    • 12059450
    • 3-Way F Metri-Pack Sealed (BK)

Pin

Wire Color

Circuit No.

Function

1

PU/WH

2530

Fuel Pressure Regulator Solenoid Supply Voltage

2

YE

2834

Fuel Pressure Regulator Solenoid Control

3

--

--

Not Used

Fuel Rail Pressure (FRP) Sensor


Object Number: 886856 Size: CH

Connector Part Information
    • 12103771
    • 3-Way F (BK)

Pin

Wire Color

Circuit Number

Function

A

OG/BK

2919

Low Reference

B

YE

2918

FRP Sensor Signal

C

TN

2917

5 Volt Reference

Fuel Temperature Sensor


Object Number: 646403 Size: CH

Connector Part Information
    • 15335987
    • 2-Way F GT 150 Sealed 3.2 X 4.0 (BK)

Pin

Wire Color

Circuit Number

Function

A

YE

1578

Fuel Temperature Signal

B

BK

470

Low Reference

Glow Plug/Intake Heater Relay Assembly


Object Number: 2074408 Size: CH

Connector Part Information
    • FW-C-4F-B
    • 4-Way F (BLK)

Pin

Wire Color

Circuit No.

Function

A

YEL

505

Glow Plug Relay Control

B

PNK/YEL

--

Ground

C

PPL

5347

IA Heater Relay Control

D

PNK

239

Ignition Voltage

High Idle Switch


Object Number: 304345 Size: CH

Connector Part Information
    • 12177195
    • 6-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

BK

750

Ground

B

BK

750

Ground

C

D-GN

534

High Idle Switch Signal

D

BN

985

IA Heater Relay Control

E

BN

2509

Left Rear Park Lamps Supply Voltage/Left Rear Park Lamps

F

BK

750

Ground

Intake Air Temperature (IAT)/Mass Air Flow (MAF) Sensor


Object Number: 655786 Size: CH

Connector Part Information
    • 15324447
    • 5-Way F 090II SLD (BK)

Pin

Wire Color

Circuit No.

Function

1

BK

552

Low Reference

2

TN

472

IAT Sensor Signal

3

PK

239

Ignition 1 Voltage

4

GY/BK

2931

Low Reference

5

YE

492

MAF Sensor Signal

Manifold Absolute Pressure (MAP) Sensor


Object Number: 68740 Size: CH

Connector Part Information
    • 12129946
    • 3-Way F Metri-Pack 150 Series, Sealed (GY)

Pin

Wire Color

Circuit No.

Function

A

OG/BK

469

Low Reference

B

L-GN

432

MAP Sensor Signal

C

GY

597

5-Volt Reference

Turbocharger Boost Pressure Sensor


Object Number: 684840 Size: CH

Connector Part Information
    • 12129946
    • 3-Way F M/P 150 Series Sealed (GY)

Pin

Wire Color

Circuit No.

Function

A

OG/BK

1057

Low Reference

B

GY/BK

433

BARO Sensor Signal

C

WH/BK

2932

5-Volt Reference

Vehicle Speed Sensor


Object Number: 666646 Size: CH

Connector Part Information
    • 15336024
    • 2-Way F GT 150 Sealed (BK)

Pin

Wire Color

Circuit No.

Function

1

L-BU

2221

Signal High - Rear

2

D-GN

2222

Signal Low - Rear

Water in Fuel Sensor


Object Number: 68721 Size: CH

Connector Part Information
    • 12059450
    • 2-Way F Metri-pack 280 Series Sealed (BK)

Pin

Wire Color

Circuit No.

Function

1

YE/BK

508

Water In Fuel Indicator Control

2

YE

IC91

Ground