GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1997 🢒 GMC C Pickup - 2WD (CNG) 🢒 Engine 🢒 Engine Controls - 5.0L and 5.7L 🢒 Engine Controls Connector End Views
Table 1: AF Fuel Pump Relay Connector C007
Table 2: Cargo Lamp Switch Connector C212
Table 3: Fuel Gauge Relay Connector C012
Table 4: Fuel Gauge Selector Switch/Fuel Indicator Light Connector C239
Table 5: Fuel Sending Unit (FSU) Connector C315
Table 6: Fuel Temperature Sensor (FTS) Connector C316 (1998 Only)
Table 7: Gas Mass Sensor (GMS) Connector C010
Table 8: High Pressure Lock-off (HPL) Connector C313
Table 9: Ignition Relay Connector C004
Table 10: Mixture Control Valve (MCV) Connector C021
Table 11: In-line Harness Connector C017
Table 12: In-line Harness Connector C017 (1998)
Table 13: In-line Harness Connector C018
Table 14: In-line Harness Connector C018 (1998)
Table 15: In-line Harness Connector C019 (1998 Only)
Table 16: In-line Engine Harness Connector C103
Table 17: In-line IP Harness Connector C104
Table 18: In-line Cargo Lamp Switch Connector C212
Table 19: Lock-Off Relay Connector C011
Table 20: Low Pressure Lock-Off (LPL) Connector C014

AF Fuel Pump Relay Connector C007


Object Number: 39685 Size: CH

Connector Part Information
    • 12110539
    • 5 Way F Sealed Flexlock 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

30

GRY

120

Fuel Pump Motor Feed (To AF Fuel Pump Relay)

85

RED

920

Switched Ignition Power

86

BRN

905

Fuel Pump Relay Control

87

--

--

Not Used

87A

WHT

917

Fuel Pump Motor Feed (From AF Fuel Pump Relay)

Cargo Lamp Switch Connector C212


Object Number: 39667 Size: CH

Connector Part Information
    • 12129136
    • 4 Way F Flexlock 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

GRY

8

Illumination Power

B

BLK

150

Ground

C

ORN

40

Battery Power

D

DK BLU/WHT

149

Switched Power

Fuel Gauge Relay Connector C012


Object Number: 39685 Size: CH

Connector Part Information
    • 12110539
    • 5 Way F Sealed Flexlock 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

30

PPL

30

Fuel Gauge

85

RED

920

Switched Ignition Power

86

GRY

904

Fuel Gauge Relay Control

87

TAN/WHT

928

Fuel Gauge Driver (ECU)

87A

PPL/WHT

918

Fuel Gauge Driver (VCM)

Fuel Gauge Selector Switch/Fuel Indicator Light Connector C239


Object Number: 40422 Size: CH

Connector Part Information
    • 12064762
    • 6 Way F Metri-Pack 150 Series (GRY)

Pin

Wire Color

Circuit No.

Function

A

RED

920

Switched Ignition Power

B

--

--

Not Used

C

BRN

912

Fuel Gauge Selector Switch Signal

D

PPL

914

Fuel Indicator Light Signal

E

BLK

150

Ground

F

GRY

8

Illumination Power

Fuel Sending Unit (FSU) Connector C315


Object Number: 62485 Size: CH

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

Pin

Wire Color

Circuit No.

Function

A

BLK

450

Ground

B

RED

920

Switched Ignition Power

C

TAN

909

FSU Signal

Fuel Temperature Sensor (FTS) Connector C316 (1998 Only)


Object Number: 236598 Size: CH

Connector Part Information
    • 12052644
    • 2 Way F Metri-Pack Sealed 150 Series (WHT)

Pin

Wire Color

Circuit No.

Function

A

DK BLU

930

Sensor Return

B

BRN

929

CNG Fuel Temperature Sensor Signal

Gas Mass Sensor (GMS) Connector C010


Object Number: 39784 Size: CH

Connector Part Information
    • 12129225
    • 24 Way F Micro-Pack 100 W Series (BLK)

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

DK GRN

906

Not Used

3

GRY

903

Eng Sync/Baro

4-5

--

--

Not Used

6

PNK

907

Actual Gas Flow

7

DK BLU

911

Desired Gas Flow

8

--

--

Not Used

9

RED

920

Switched Ignition Power

10-20

--

--

Not Used

21

BLK

450

Ground

22

BLK

450

Ground

23

PNK

921

Motor Power

24

GRY

922

Motor Return

High Pressure Lock-off (HPL) Connector C313


Object Number: 236598 Size: CH

Connector Part Information
    • 12052641
    • 2 Way Metri-Pack Sealed 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

PPL

915

Lock-off Power

B

LT GRN

913

HPL Control

Ignition Relay Connector C004


Object Number: 39685 Size: CH

Connector Part Information
    • 12110539
    • 5 Way F Sealed Flexlock 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

30

ORN

140

Battery Power

85

PNK

639

Ignition Power

86

BLK

450

Ground

87

WHT

916

Switched Ignition Power

87A

--

--

Not Used

Mixture Control Valve (MCV) Connector C021


Object Number: 237066 Size: CH

Connector Part Information
    • 12162194
    • 2 Way F Metri-Pack Sealed 150.2 Series, P2S (BLK)

Pin

Wire Color

Circuit No.

Function

A

GRY

922

Motor Return

B

PNK

921

Motor Power

In-line Harness Connector C017


Object Number: 280743 Size: CF

Connector Part Information
    • 12065426
    • 10 Way F Metri-Pack Sealed 150 Series (MD GRY)

Connector Part Information
    • 12052189
    • 10 Way M Metri-Pack Sealed 150 Series (GRY)

Pin

Wire Color

Circuit No.

Function

Pin

Wire Color

Circuit No.

Function

A

YEL

492

MAF Signal

A

YEL

492

MAF Signal

B

YEL

573

4X CKP Signal

B

YEL

573

4X CKP Signal

C

--

--

Not Used

C

--

--

Not Used

D

DK GRN

389

VSS Input Signal

D

DK GRN

389

VSS Input Signal

E

WHT

1667

HO2S Bank 2 Sensor 1 Low

E

TAN

1667

HO2S Bank 2 Sensor 1 Low

F

PPL

1666

HO2S Bank 2 Sensor 1 High

F

PPL

1666

HO2S Bank 2 Sensor 1 High

G

TAN/WHT

1653

HO2S Bank 1 Sensor 1 Low

G

TAN/WHT

1653

HO2S Bank 1 Sensor 1 Low

H

PPL/WHT

1665

HO2S Bank 1 Sensor 1 High

H

PPL/WHT

1665

HO2S Bank 1 Sensor 1 High

J

BRN

919

MIL Output Signal

J

BRN

919

MIL Output Signal

K

BRN/WHT

419

MIL Input Signal

K

BRN/WHT

419

MIL Input Signal

In-line Harness Connector C017 (1998)


Object Number: 280743 Size: CF

Connector Part Information
    • 12065426
    • 10 Way F Metri-Pack Sealed 150 Series (MD GRY)

Connector Part Information
    • 12052189
    • 10 Way Metri-Pack Sealed 150 Series (GRY)

Pin

Wire Color

Circuit No.

Function

Pin

Wire Color

Circuit No.

Function

A

YEL

492

MAF Signal

A

YEL

492

MAF Signal

B

DK GRN

389

VSS Input Signal

B

DK GRN

389

VSS Input Signal

C

PNK

639

Ignition Signal

C

PNK

639

Ignition Signal

D

YEL

573

4X CKP Signal

D

YEL

573

4X CKP Signal

E

TAN

1667

HO2S Bank 2 Sensor 1 Low

E

TAN

1667

HO2S Bank 2 Sensor 1 Low

F

PPL

1666

HO2S Bank 2 Sensor 1 High

F

PPL

1666

HO2S Bank 2 Sensor 1 High

G

TAN/WHT

1653

HO2S Bank 1 Sensor 1 Low

G

TAN/WHT

1653

HO2S Bank 1 Sensor 1 Low

H

PPL/WHT

1665

HO2S Bank 1 Sensor 1 High

H

PPL/WHT

1665

HO2S Bank 1 Sensor 1 High

J

BRN

919

MIL Output Signal

J

BRN

919

MIL Output Signal`

K

BRN/WHT

419

MIL Input Signal

K

BRN/WHT

419

MIL Input Signal

In-line Harness Connector C018


Object Number: 280743 Size: CF

Connector Part Information
    • 12065425
    • 10 Way F Metri-Pack Sealed 150 Series (BLK)

Connector Part Information
    • 12045808
    • 10 Way M Metri-Pack Sealed 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

Pin

Wire Color

Circuit No.

Function

A

YEL

410

ECT Signal

A

YEL

410

ECT Signal

B

TAN

472

IAT Signal

B

TAN

472

IAT Signal

C

DK BLU

417

TP Signal

C

DK BLU

417

TP Signal

D

GRY

474

5V Reference B

D

GRY

474

5V Reference B

E

LT GRN

432

MAP Signal

E

LT GRN

432

MAP Signal

F

BLK

470

Sensor Ground

F

BLK

470

Sensor Ground

G

BRN

1456

EGR Pintle Position

G

BRN

1456

EGR Pintle Position

H

DK GRN/WHT

459

A/C Relay Enable

H

DK GRN/WHT

459

A/C Relay Enable

J

PNK

902

NGV Enable

J

PNK

902

NGV Enable

K

--

--

Not Used

K

--

--

Not Used

In-line Harness Connector C018 (1998)


Object Number: 280743 Size: CF

Connector Part Information
    • 12065425
    • 10 Way F Metri-Pack Sealed 150 Series (BLK)

Connector Part Information
    • 12045808
    • 10 Way Metri-Pack Sealed 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

Pin

Wire Color

Circuit No.

Function

A

YEL

410

ECT Signal

A

YEL

410

ECT Signal

B

TAN

472

IAT Signal

B

TAN

472

IAT Signal

C

DK BLU

417

TP Signal

C

DK BLU

417

TP Signal

D

GRY

474

5V Reference B

D

GRY

474

5V Reference B

E

LT GRN

432

MAP Signal

E

LT GRN

432

MAP Signal

F

BLK

470

Sensor Ground

F

BLK

470

Sensor Ground

G

BRN

1456

EGR Pintle Position

G

BRN

1456

EGR Pintle Position

H

--

--

Not Used

H

--

--

Not Used

J

PNK

902

NGO Enable

J

PNK

902

NGO Enable

K

--

--

Not Used

K

--

--

Not Used

In-line Harness Connector C019 (1998 Only)


Object Number: 62447 Size: CF

Connector Part Information
    • 12052848
    • 6 Way F Metri-Pack Sealed 150 Series (BLK)

Connector Part Information
    • 12124107
    • 6 Way M Metri-Pack Sealed 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

Pin

Wire Color

Circuit No.

Function

A

GRY

120

Fuel Pump Motor Feed (To AF Fuel Pump Relay)

A

GRY

120

Fuel Pump Motor Feed (To AF Fuel Pump Relay)

B

GRY/BLK

917

Fuel Pump Motor Feed (From AF Fuel Pump Relay)

B

GRY/BLK

917

Fuel Pump Motor Feed (From AF Fuel Pump Relay)

C

PPL/WHT

918

Fuel Gauge Driver (VCM)

C

PPL/WHT

918

Fuel Gauge Driver (VCM)

D

PPL

30

Fuel Gauge

D

PPL

30

Fuel Gauge

E

--

--

Not Used

E

--

--

Not Used

F

ORN

140

Battery Power

F

ORN

140

Battery Power

In-line Engine Harness Connector C103


Object Number: 40394 Size: CF

Connector Part Information
    • 12129600
    • 4 Way M Metri-Pack Sealed 280 Series (DK GRY)

Connector Part Information
    • 12129565
    • 4 Way M Metri-Pack Sealed 280 Series (MD GRY)

Pin

Wire Color

Circuit No.

Function

Pin

Wire Color

Circuit No.

Function

A

LT GRN

24

Backup Lamp Power

A

LT GRN

24

Backup Lamp Power

B

WHT

120

Fuel Pump Motor Feed (To AF Fuel Pump Relay)

B

WHT

917

Fuel Pump Motor Feed (From AF Fuel Pump Relay)

C

PNK

639

Ignition Power

C

PNK

639

Ignition Power

D

BLK/WHT

451

Ground

D

BLK/WHT

451

Ground

In-line IP Harness Connector C104


Object Number: 280746 Size: CF

Connector Part Information
    • 12084891
    • 5 Way F Metri-Pack Sealed 280 Series (MD GRY)

Connector Part Information
    • 12085036
    • 5 Way M Metri-Pack Sealed 280 Series (GRY)

Pin

Wire Color

Circuit No.

Function

Pin

Wire Color

Circuit No.

Function

A

BRN

9

Park Lamp Switch Power

A

BRN

9

Park Lamp Switch Power

B

PPL

30

Fuel Gauge

B

PPL

918

Fuel Gauge Driver (VCM)

C

YEL

18

LH Turn Signal Power

C

YEL

18

LH Turn Signal Power

D

DK GRN

19

RH Turn Signal Power

D

DK GRN

19

RH Turn Signal Power

E

WHT

17

Stop Lamp Switch Power

E

WHT

17

Stop Lamp Switch Power

In-line Cargo Lamp Switch Connector C212


Object Number: 95855 Size: CF

Connector Part Information
    • 12129136
    • 4 Way F Flexlock 280 Series (BLK)

Connector Part Information
    • 12129135
    • 4 Way M Flexlock 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

Pin

Wire Color

Circuit No.

Function

A

GRY

8

Illumination Power

A

GRY

8

Illumination Power

B

BLK

150

Ground

B

BLK

150

Ground

C

ORN

40

Battery Power

C

ORN

40

Battery Power

D

DK BLU/WHT

149

Switched Power

D

DK BLU/WHT

149

Switched Power

Lock-Off Relay Connector C011


Object Number: 39685 Size: CH

Connector Part Information
    • 12110539
    • 5 Way F Sealed Flexlock 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

30

ORN

140

Battery Power

85

GRY

120

Fuel Pump Motor Feed (To AF Fuel Pump Relay)

86

BLK

450

Ground

87

PPL

915

Lock-off Power

87A

--

--

Not Used

Low Pressure Lock-Off (LPL) Connector C014


Object Number: 236598 Size: CH

Connector Part Information
    • 12052641
    • 2 Way F Metri-Pack Sealed 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

PPL

915

Lock-off Power

B

LT BLU

901

LPL Control