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

Powertrain Control Module (PCM) Connector C1


Object Number: 15026  Size: CF

Connector Part Information

    • Complete Assembly (W/O TPA) - 12191488
    • 80 Way F Micro- Pack 100W Sealed Series
    • TPA (Blue) - 12176408
    • Terminal - 12084913

Pin

Wire Color

Circuit No.

Function

1

ORN

1799

High Resolution Signal

2

LT BLU/WHT

1800

CKP Sensor A Signal

3-4

--

--

Not Used

5

DK GRN

890

Fuel Tank Pressure Sensor Signal

6

YEL

5

Crank Voltage

7-9

--

--

Not Used

10

TAN

472

IAT Sensor Signal

11

GRY

773

Transmission Range Switch Signal C

12

YEL

772

Transmission Range Switch Signal B

13

BLK/WHT

771

Transmission Range Switch Signal A

14

YEL/BLK

573

CKP Sensor B Signal

15

--

--

Not Used

16

DK BLU/WHT

1231

AT ISS Low Signal

17

RED/BLK

1230

AT ISS High Signal

18

PPL

1807

Class 2 Serial Data

19

WHT

1390

Off/Run/Crank Voltage

20

ORN

240

Battery Positive Voltage

21

ORN

240

Battery Positive Voltage

22

RED

2127

IC 7 Control

23

LT GRN

432

MAP Sensor Signal

24

--

--

Not Used

25

DK GRN

335

Low Speed Cooling Fan Relay Control

26

DK GRN/WHT

817

Vehicle Speed Signal

27

LT GRN/BLK

444

IAC Coil B Low Control

28

LT GRN/WHT

1749

IAC Coil B High Control

29

LT BLU/WHT

1747

IAC Coil A High Control

30

LT BLU/BLK

1748

IAC Coil A Low Control

31

DK GRN

676

HO2S Heater High Control (Bank 1 Sensor 1)

32

BRN/WHT

419

MIL Control

33

BRN

3122

HO2S Heater Low Control (Bank 2 Sensor 1)

34

TAN/BLK

464

Delivered Torque Signal

35

DK GRN

83

Cruise Control Inhibit Signal

36

--

--

Not Used

37

BLK

1744

Fuel Injector 1 Control

38

PNK/BLK

1746

Fuel Injector 3 Control

39

LT GRN

1745

Fuel Injector 2 Control

40

BLK/WHT

845

Fuel Injector 5 Control

41

WHT

776

Transmission Range Switch Signal P

42

YEL

492

MAF Sensor Signal

43

ORN/BLK

463

Requested Torque Signal

44

GRY

847

Extended Travel Brake Switch Signal

45-49

--

--

Not Used

50

DK BLU/WHT

1677

HO2S Low Signal (Bank 1 Sensor 2)

51

DK GRN/WHT

1678

HO2S High Signal (Bank 1 Sensor 2)

52

TAN

1664

HO2S Low Signal (Bank 1 Sensor 1)

53

PPL/WHT

1665

HO2S High Signal (Bank 1 Sensor 1)

54

TAN/WHT

1669

HO2S Low Signal (Bank 2 Sensor 1)

55

PPL/WHT

1668

HO2S High Signal (Bank 2 Sensor 1)

56

YEL

400

Signal High - Front

57

PPL

401

Signal Low - Front

58

RED

631

12 Volt Reference

59

PPL

1807

Class 2 Serial Data

60

BLK/WHT

451

Ground

61

PPL

2121

IC 1 Control

62

DK BLU

417

TP Sensor Signal

63

PNK

39

Ignition 1 Voltage

64-65

--

--

Not Used

66

PNK/BLK

429

AIR Solenoid Control

67

LT BLU/WHT

1229

PC Solenoid Valve Low Control

68

BLK

3112

H2OS Heater Low Control (Bank 1 Sensor 1)

69

RED/BLK

1228

PC Solenoid Valve High Control

70

DK GRN/WHT

465

Fuel Pump Relay Control

71

RED

1676

EGR Solenoid High Control

72

PPL

1490

Chassis Pitch Signal

73

WHT

1310

EVAP Canister Vent Solenoid Control

74

--

--

Not Used

75

BRN

436

AIR Pump Relay Control

76

LT BLU/BLK

844

Fuel Injector 4 Control

77

YEL/BLK

846

Fuel Injector 6 Control

78

--

--

Not Used

79

DK BLU/WHT

878

Fuel Injector 8 Control

80

RED/BLK

877

Fuel Injector 7 Control

Powertrain Control Module (PCM) Connector C2


Object Number: 15030  Size: CF

Connector Part Information

    • Complete Assembly (W/O TPA) - 12191488
    • 80 Way F Micro- Pack 100W Sealed Series
    • TPA (Clear) - 12176409
    • Terminal - 12084913

Pin

Wire Color

Circuit No.

Function

1-2

--

--

Not Used

3

BLK/WHT

451

Ground

4

BLK

2760

Low Reference

5

--

--

Not Used

6

ORN/BLK

469

Low Reference

7-8

--

--

Not Used

9

YEL

2174

Low Reference

10

--

--

Not Used

11

BLK

2762

Low Reference

12

BLK

2753

Low Reference

13

BLK

2759

Low Reference

14

BLK

2751

Low Reference

15

BLK/WHT

451

Ground

16

--

--

Not Used

17

GRY

2709

5 Volt Reference

18

--

--

Not Used

19

DK BLU

496

Knock Sensor [1] Signal

20

TAN/BLK

231

Oil Pressure Switch Signal

21

LT BLU

2123

IC 3 Control

22

RED/WHT

2122

IC 2 Control

23

BRN

1174

Oil Level Switch Signal

24

LT BLU/BLK

396

Cruise Control Engaged Signal

25

LT GRN

2867

12 Volt Reference

26

BLK/WHT

451

Ground

27

--

--

Not Used

28

YEL

2868

Low Reference

29-30

--

--

Not Used

31

YEL

410

ECT Sensor Signal

32

YEL/BLK

1227

TFT Sensor Signal

33-34

--

--

Not Used

35

GRY

1716

Low Reference

36

--

--

Not Used

37

RED

1226

Transmission Fluid Pressure Switch Signal C

38-39

--

--

Not Used

40

RED

225

Generator Turn On Signal

41

--

--

Not Used

42

DK GRN/WHT

428

EVAP Canister Purge Solenoid Control

43

LT GRN

1222

1-2 Shift Solenoid Valve Control

44

YEL

447

Starter Relay Coil Control

45

YEL/BLK

1223

2-3 Shift Solenoid Valve Control

46

TAN/BLK

422

TCC Solenoid Valve Control

47

DK GRN/WHT

459

A/C Compressor Clutch Relay Control

48

BLK/WHT

1423

HO2S Heater Low Control (Bank 1 Sensor 2)

49

GRY

2704

5 Volt Reference

50

GRY

2702

5 Volt Reference

51

GRY

2701

5 Volt Reference

52

BRN

1456

EGR Valve Position Signal

53

--

--

Not Used

54

GRY

904

Ignition Coil Supply Voltage

55

DK BLU

473

High Speed Cooling Fan Relay Control

56

WHT

121

Engine Speed Signal

57

GRY

2700

5 Volt Reference

58

--

--

Not Used

59

DK GRN/WHT

2124

IC 4 Control

60

LT BLU/WHT

2126

IC 6 Control

61

PPL/WHT

2128

IC 8 Control

62

DK GRN

2125

IC 5 Control

63-64

--

--

Not Used

65

LT GRN

1867

12 Volt Reference

66

YEL/BLK

1868

Low Reference

67

PNK/BLK

632

Low Reference

68

BLK

2761

Low Reference

69

BLK

2752

Low Reference

70

GRY

435

EGR Solenoid Control

71

GRY

2175

Low Reference

72

PPL

1589

Fuel Level Sensor Signal

73

PNK

1224

Transmission Fluid Pressure Switch Signal A

74

RED/BLK

380

A/C Refrigerant Pressure Sensor Signal

75-78

--

--

Not Used

79

GRY

23

Generator Field Duty Cycle Signal

80

PPL

420

TCC Brake Switch/Cruise Control Release Signal