GM Service Manual Online
For 1990-2009 cars only
Table 1: PCM Connector C1 (BLU)
Table 2: PCM Connector C2 (RED)

PCM Connector C1 (BLU)


Object Number: 23346  Size: CF

Connector Part Information

    • PCM Connector C1 Assembly 12191489
    • TPA 12176408 (BLU)
    • Connector Cover 12191108

Pin

Wire Color

Circuit No.

Function

1

BLK/WHT

451

PCM Ground

2

LT GRN

1867

Crankshaft Position Sensor B+ Supply

3

PNK/BLK

1746

Injector 3 Control

4

LT GRN/BLK

1745

Injector 2 Control

5-10

--

--

Not Used

11

LT BLU

1876

Knock Sensor Signal Rear

12

DK BLU/WHT

1869

Crankshaft Position Sensor Signal

13-16

--

--

Not Used

17

DK BLU

1225

Transmission Range Signal B

18

RED

1226

Transmission Range Signal C

19

PNK

439

PCM Ignition Supply

20

ORN

440

PCM Battery Supply

21

YEL/BLK

1868

Crankshaft Position Sensor Ground

22

--

--

Not Used

23

PPL

719

Sensor Ground

24

--

--

Not Used

25

TAN

1671

HO2S Signal Low Bank 2 Sensor 2

26

TAN

1667

HO2S Signal Low Bank 2 Sensor 1

27

--

--

Not Used

28

TAN/WHT

1669

HO2S Signal Low Bank 1 Sensor 2

29

TAN/WHT

1653

HO2S Signal Low Bank 1 Sensor 1

30

LT GRN

1478

Engine Coolant Level Switch

31

--

--

Not Used

32

BLK/WHT

771

PRND A Input

33

PPL

420

TCC Brake Switch

34

WHT

776

PRND P Input

35

GRA

48

Clutch Switch Signal

36

BLK

1744

Injector 1 Control

37

YEL/BLK

846

Injector 6 Control

38-39

--

--

Not Used

40

BLK/WHT

451

PCM Ground

41

BLK

407

Sensor Ground

42

--

--

Not Used

43

RED/BLK

877

Injector 7 Control

44

LT BLU/BLK

844

Injector 4 Control

45

GRA

474

Fuel Tank Pressure Sensor 5V Reference

46

GRA

416

TP Sensor 5V Reference

47

GRA

597

MAP Sensor 5V Reference

48

GRA

596

EGR Pintle Position Sensor 5V Reference

49-50

--

--

Not Used

51

DK BLU

496

Knock Sensor Signal Front

52

--

--

Not Used

53

BLK

470

Fuel Tank Pressure Sensor Ground

54

BLK

452

TP Sensor Ground

55

BRN

1456

EGR Pintle Position Sensor Signal

56

--

--

Not Used

57

ORN

440

PCM Battery Supply

58

DK GRN

1049

Serial Data

59

YEL

710

Serial Data

60

ORN/BLK

469

MAP Sensor Ground

61

PNK/BLK

632

CMP Sensor Ground

62

--

--

Not Used

63

GRA

720

Engine Coolant Temperature (ECT) Sensor Ground

64

--

--

Not Used

65

PPL

1670

HO2S Signal High Bank 2 Sensor 2

66

PPL

1666

HO2S Signal High Bank 2 Sensor 1

67

--

--

Not Used

68

PPL/WHT

1668

HO2S Signal High Bank 1 Sensor 2

69

PPL/WHT

1665

HO2S Signal High Bank 1 Sensor 1

70

BRN

1174

Low Oil Level Switch

71

--

--

Not Used

72

YEL

772

PRND B Input

73

BRN/WHT

633

Camshaft Position (CMP) Sensor Signal

74

YEL

410

Engine Coolant Temperature (ECT) Sensor Signal

75

PNK

1020

PCM Ignition Supply

76

BLK/WHT

845

Injector 5 Control

77

DK BLU/WHT

878

Injector 8 Control

78

--

--

Not Used

79

WHT

687

3-2 Shift Solenoid Control

80

ORN/BLK

510

Fuel Level Sensor Ground

PCM Connector C2 (RED)


Object Number: 23346  Size: CF

Connector Part Information

    • PCM Connector C2 Assembly 12191488
    • TPA 12176410 (RED)
    • Connector Cover 12191108

Pin

Wire Color

Circuit No.

Function

1

BLK/WHT

451

PCM Ground

2

BRN

418

TCC Control Solenoid

3-5

--

--

Not Used

6

RED/BLK

1228

Transmission Fluid Pressure Control Solenoid High

7

RED

1676

EGR Solenoid Supply

8

LT BLU/WHT

1229

Transmission Fluid Pressure Control Solenoid Low

9

DK GRN/WHT

465

Fuel Pump Relay Control

10

WHT

121

Engine Speed (Tach) Output Signal

11

DK BLU

604

Secondary A/C High Pressure Switch

12

--

--

Not Used

13

LT BLU/BLK

396

Cruise Control Engage Signal

14

--

--

Not Used

15

BRN

25

Generator L Terminal

16

GRA/BLK

1694

4 Wheel Drive Switch Signal Low

17

DK GRN/WHT

762

A/C Request Signal

18

--

--

Not Used

19

BLK/WHT

1695

4 Wheel Drive Front Axle Switch

20

LT GRN/BLK

822

Vehicle Speed Sensor (VSS) Reference Low

21

PPL/WHT

821

Vehicle Speed Sensor (VSS) Signal

22

RED/BLK

1230

Vehicle Speed Sensor (VSS) Signal (6.0L Only)

23

DK BLU/WHT

1231

Vehicle Speed Sensor (VSS) Reference Low (6.0L Only)

24

DK BLU

417

TP Sensor Signal

25

TAN

472

IAT Sensor Signal

26

PPL

2121

Ignition Control 1

27

RED

2127

Ignition Control 7

28

LT BLU/WHT

2126

Ignition Control 6

29

DK GRN/WHT

2124

Ignition Control 4

30

--

--

Not Used

31

YEL

492

MAF Sensor Signal

32

LT GRN

432

MAP Sensor Signal

33

DK GRN

1614

HVAC Recirculation Door Control

34

DK GRN/WHT

428

EVAP Canister Purge Solenoid Control

35

--

--

Not Used

36

BRN

436

AIR Pump Relay Control (w/NC1)

37-38

--

--

Not Used

39

RED

631

CMP Sensor B+ Supply

40

BLK/WHT

451

PCM Ground

41

WHT

257

EGR Solenoid Ground

42

TAN/BLK

422

TCC Enable Circuit (4L60-E only)

43

DK GRN/WHT

459

A/C Clutch Relay Control

44

--

--

Not Used

45

WHT

1310

EVAP Canister Vent Valve Control

46

BRN/WHT

419

Malfunction Indicator Lamp (MIL) Control

47

YEL/BLK

1223

Transmission Shift Solenoid B

48

LT GRN

1222

Transmission Shift Solenoid A

49

YEL/BLK

1827

Vehicle Speed Output Circuit 128K

50

DK GRN/WHT

817

Vehicle Speed Output Circuit 4K

51

YEL/BLK

1227

Transmission Temperature Sensor Signal

52-53

--

--

Not Used

54

PPL

1589

Fuel Level Sensor Signal

55

DK GRN

603

A/C Compressor Cycling Switch Signal

56

--

--

Not Used

57

BLK

552

IAT Sensor Ground

58-59

--

--

Not Used

60

BRN

2129

Ignition Control Reference Low Bank 1

61

BRN/WHT

2130

Ignition Control Reference Low Bank 2

62

GRA

773

PRND C

63

PNK

1224

Transmission Range Signal A

64

DK GRN

890

Fuel Tank Pressure Sensor Signal

65

--

--

Not Used

66

PPL/WHT

2128

Ignition Control 8

67

RED/WHT

2122

Ignition Control 2

68

DK GRN

2125

Ignition Control 5

69

LT BLU

2123

Ignition Control 3

70-75

--

--

Not Used

76

LT GRN/WHT

1749

IAC Coil B High

77

LT GRN/BLK

444

IAC Coil B Low

78

LT BLU/BLK

1748

IAC Coil A Low

79

LT BLU/WHT

1747

IAC Coil A High

80

--

--

Not Used